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Expeditions to the Sea Floor.....East Pacific Rise Part 2 February 02, 2009 4:49 AM

   

View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
80.6°F (27°C)
Latitude: 1 deg 16’N
Longitude: 102 deg 18’W
Wind Direction: Variable
Wind Speed: 8 Knots
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1013 MB
Visibility: 10-25 Nautical Miles

     Please stay tuned for the next installment.....

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 February 04, 2009 4:09 AM

what's to eat today?
Breakfast
Western Omelet
Blueberry Pancakes
Pound cake
Hash Browns and hot cereal
Bacon and sausage
Eggs to order
Mangos and melons
Dry cereal

Lunch
Chicken Tortas with salsa
Lyonnaise potatoes
Black eyed peas
Mushroom soup
Salad bar
Dan’s whatchamacallits

Dinner
BBQ Tenderloin
Baked Potato
Steamed New Zealand Mussels
Rice with mushrooms
Grilled onions
Fresh baked dinner rolls
Salad bar
Sour cream apple squares
Homemade cinnamon and spice ice cream  [ send green star]
 
 February 06, 2009 4:19 AM

This is what Mike Perfit and Dan Fornari found when they went to use "Mighty Mo" the rock corer tonight. Those naughty Pollywogs will pay for this! We cross the Equator in only a few days, and then the Honorable Shellbacks on King Neptune's Royal Ship RV Melville will rid the vessel of the Pollywogs. Their days are numbered!

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 February 08, 2009 4:34 AM

King Neptune and the Royal Court visit RV Melville
April 17, 2000
By Davey Jones

As the official scribe and reporter for His Royal Highness King Neptune, it is my duty to report that RV Melville crossed into the realm of the Equatorial Regions today. The Melville, with a fit and capable crew of noble Shellbacks on board, is one of Neptune’s prized vessels used to investigate the secrets of the briny deep. Unfortunately, there was also a contingent of scurrilous Pollywogs on board -- people who have never crossed the Equator before on a ship.

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 February 10, 2009 4:27 AM

Only Shellbacks are authorized to ply the sacred waters of King Neptune’s briny realm. So this afternoon, Captain Buck welcomed King Neptune, his Queen, and the Royal Court, as they boarded Melville for the Equator Crossing ceremony to rid the ship of the Pollywogs.

The Pollywogs were required to clean the ship thoroughly from bow to stern, and measure its length with both a squid and a flying fish (268 squid lengths and 210 flying fish lengths). They then entertained the Royal Court with songs and skits. The sacred ceremony was performed as RV Melville traveled through the glassy tropical waters at 12.5 knots. Magically, the transformation was accomplished, and Melville now sails towards the Galapagos Islands with only noble Shellbacks on board.

Official Record of the Sea Chantey recited by the Pollywogs to entertain the Royal Court:

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 February 12, 2009 4:46 AM

I was born on the crest of a wave,
Rocked in the cradle of the deep.
My father is King Neptune, my Mother a mermaid,
My eyes be stars, my teeth be spars,
And when I spit, I spits tar, Argh be Argh!

 

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 February 14, 2009 4:29 AM

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
87.8°F (31°C)
Latitude: 2 deg 14’N
Longitude: 98 deg 40’W
Wind Direction: n/a
Wind Speed: calm
Sea State: 1
Swell(s) Height: 2-4 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles

what's to eat today?
Breakfast
Linguica and eggs
Bacon and sausage
Oatmeal and raisin cookies
Hash browns and hot cereal
Walnut waffles
Eggs to order
Mangos and melons
Dry cereal
Polywog Breakfast

Lunch
Pepperoni Pizza
Matzo ball soup
Buffalo wings
Polywog pizza
Salad bar
Hermit cookies

Dinner
Honey glazed dinner ham
Au gratin potatoes
Peek-n-beans
Vegetables and fresh dinner rolls
Salad bar
Chocolate cake a la mode

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 February 16, 2009 4:09 AM

Crossing the Line!
April 18, 2000
By Ben Wigham -- aka "Klutz" Pollywog

After days of creating mischief and playing practical jokes on those most “honorable” Shellbacks on board RV Melville, the day of judgment for us Pollywogs was fast approaching! In the VERY early hours of yesterday morning, we were woken up by a cut-throat band of brigands, who closely resembled Chief Mate Dave Murline and other co-conspirators from the Melville’s crew. A bleary-eyed band of Pollywogs were led to the ship’s bow where we were given our Pollywog names. We were made to scrub the decks and learn sea chanteys under the watchful eyes of Dave and his motley crew. Captain Buck then had us accurately measure the length of ship. Unfortunately, he had conveniently forgotten to supply us with a tape measure, so we were forced to measure the ship using a squid and a flying fish!

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 February 18, 2009 4:17 AM

Cleaning was a big part of our day! After a hearty breakfast of jellybean pancakes, rainbow colored eggs, and oatmeal, we were given various cleaning tasks by the Shellback scientists and technicians, included cleaning the rust off the DSL-120 clump weight! Lunch brought another culinary treat from Dan the cook -- pizza. Not bad you're thinking? But how about pizza with a peanut butter, chocolate, cheese, and pickle topping?  [ send green star]
 
 February 20, 2009 4:35 AM

After lunch, King Neptune (a superbly cast Bob Elder) and his Royal Court arrived on the Melville -- it was time for the Pollywogs to pay for their crimes! We were forced to entertain the Royal Court and other watching Shellbacks. We had written a couple of songs and a hilarious skit, which poked fun (in a nice way!) at our principal scientists and favorite Resident Technician, Ron Comer. By now, the Shellbacks were thinking that the day was going very well for them. They didn’t know that we Pollywogs were well prepared, and had one last trick up our sleeves! At the end of our last song, we revealed our secret stash of water balloons and plastic dart guns, and launched one last defiant assault on the surprised Shellbacks. Our mini-mutiny was short-lived, and soon we found ourselves surrounded and blindfolded in a corner of the deck.  [ send green star]
 
 February 22, 2009 4:27 AM

Then came time for the trials! We Pollywogs were led in turn before King Neptune, where we were tried and sentenced by the Royal Court to “torture” and “execution”! All the time, we could hear the Shellbacks being egged on by our increasingly excitable Chief Scientist! After this “ordeal”, we were then all happily reborn as the newest Shellbacks -- free at last to safely sail throughout the seas of Neptune’s realm.  [ send green star]
 
 February 26, 2009 5:07 AM

The whole day was great fun from start to finish, with great costumes and great jokes. It was the perfect way to end the first leg of our expedition! We’re all just glad that we don’t have to do it all again on the way home!


   

View Today's Slideshow!


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 February 28, 2009 4:28 AM

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
82.4°F (28°C)
Latitude: 0 deg 24’N
Longitude: 94 deg 06’W
Wind Direction: n/a
Wind Speed: calm
Sea State: 0
Swell(s) Height: 2-4 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles

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 March 02, 2009 4:46 AM

what's to eat today?
Breakfast
Farmer's Breakfast
French toast
Hash browns and hot cereal
Bacon and sausage
Cinnamon rolls
Eggs to order
Pineapple and melon
Dry cereal

Lunch
Mexicali pork chops
Beans and rice
Seafood soup
Salad bar
Assorted cookies

Dinner by Dan Fornari
Spicy marinara sauce
Spinach pesto sauce
Sausage and vegetable sauce
Linguini and penne pasta
Foccaccia
Salad Bar
Chocolate mousse with orange pound cake  [ send green star]
 
 March 04, 2009 4:26 AM

Dave Grimes entertained members of the science party last night with his sea chanteys played on his concertina. (Click here and check out the sound file of one of his chanteys.)

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 March 06, 2009 4:33 AM

At anchor in the Galapagos Islands
April 19, 2000
By Dr. Susan Humphris

This morning, the RV Melville sailed into Santa Cruz Island, one of the main islands in the Galapagos archipelago. She set anchor in Academy Bay where she will remain until Thursday evening. Check out the slide show for some pictures of the island and the wildlife that the scientists have seen so far. Tomorrow, they will go on a field trip and visit the Charles Darwin Field Station -- we expect more great slides of the island!

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 March 08, 2009 4:19 AM

You may be wondering why I am writing this update from Woods Hole Oceanographic Institution. As you know, the scientists are sending the updates and slide shows using the SeaNet satellite. While they are at sea, the ship has a clear “line of sight” to the satellite at all times. But, while they are at anchor in Academy Bay, the ship swings as the wind, tides and currents change. In certain positions, the land blocks the ship’s “line of sight” to the satellite. When that happens, the transmission doesn’t get through. Jim Charters was able to get the slide show of their arrival transmitted to us before the RV Melville swung round into a position where they could no longer “see” the satellite.  [ send green star]
 
 March 10, 2009 4:25 AM

Everything will be fine again by tomorrow evening, when they leave Academy Bay to sample the submarine parts of Fernandina Volcano. Then they will be on the open ocean, and once again, able to “see” the SeaNet satellite!


 

View Today's Slideshow!


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 March 12, 2009 4:11 AM

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
82.4°F (28°C)
Latitude: 0 deg 45.12’N
Longitude: 90 deg 17.83’W
Wind Direction: n/a
Wind Speed: calm
Sea State: 0
Swell(s) Height: 2-4 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles

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 March 14, 2009 4:03 AM

Adventures in the Galapagos Islands
April 20, 2000

RV Melville pulled into Academy Bay on Santa Cruz Island yesterday, 164 years after the Beagle arrived here with Charles Darwin. We were all looking forward to seeing the wonders of nature that these islands provide. Below are two accounts of some of our experiences during our brief, but very enjoyable, port stop.  [ send green star]
 
 March 16, 2009 4:29 AM

Diving with sharks

By Greg Kurras Most marine life has learned to fear and hide from humans. However, in the Galapagos Islands, spiny lobsters stare you in the eye and sea lions nudge you as you swim by. Strict laws protect all marine life in the Galapagos Islands. That is why divers can find animals that are as curious about rubber-clad, funny looking humans as the humans are about them! Sharks, sea lions, manta rays, lobster, sea turtles, and even the fish, approach divers with a timid curiosity. So, while most of the science crew went inland to explore the highlands of Santa Cruz, I went to explore the underwater world around the island. I could spend hours describing the wonders I saw. Imagine swimming with a school of twenty or more white tip sharks, each shark coming over to check out the new member (you!); seeing a couple of 3 meter-long hammer head sharks pass only less than an arm length above you as you hold your breath to avoid scaring them away; watching sea turtles sleeping in underwater caves; playing underwater tag with a family of sea lions.  [ send green star]
 
 March 18, 2009 4:03 AM

The Galapagos Islands are such an amazing place! I think my favorite moment was watching a school of white tip shark swimming “in-place” against the current. As I clung to the rocks fascinated by the product of millions of years of evolution, and surrounded by one of nature’s most efficient eating machines -- the shark, I saw something I never expected to see. Among the white tip sharks, there were three sea lions racing around playing, a couple of sea turtles lazily swimming through the sharks, and two very large hammer head sharks passing a couple of meters above the white tips! None of these creatures was trying to eat or kill each other -- or more importantly me! We were all completely at ease. Thirty minutes later, as my dive buddy and I slowly rose to the surface, I noticed a large manta ray (with a wing span of about 3 meters) gracefully gliding past. Nature is so amazing!
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 March 20, 2009 4:20 AM

Snorkeling with sea lions
By Ben Wigham and Jonathan Burgess

Yesterday afternoon, eight of the students and Resident Technician Randy Dickau took to the high seas in search of adventure. A hastily arranged snorkeling trip, booked with the aid of master haggler Jon Burgess, soon turned into one of the highlights of our stay in the Galapagos. After a brief but bumpy boat ride, we reached the small island of Caama�o -- home to a large colony of sea lions. We were immediately welcomed by a large group of playful pups, who seemed intent on showing off. We wasted little time in jumping into the water to join them, and were soon accepted into the fun and games. There were at least thirty pups and some watchful adults making sure that we posed no threat to their youngsters. The pups were very inquisitive and moved gracefully, but quickly, through the water around us. Mimicking the twists and turns of our mammalian cousins, we found it impossible to keep up with these agile and friendly creatures! Some pups mischievously nibbled at our fins while others played tug-of-war with a piece of rope. Some snapped up the occasional fish in front of our eyes, and played a game of catch with an unfortunate sea cucumber! We were struck by their intelligence and abundance of energy as we played for over an hour. Playing with wild sea lion pups in their natural habitat was an experience difficult to convey in words -- and one that we will not soon forget. We hope that the animals of the Galapagos Islands continue to accept humans in their environment for as long as we give them no reason to fear us.

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 March 22, 2009 4:14 AM



View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
84.2°F (29°C)
Latitude: 0 deg 45’S
Longitude: 90 deg 17’W
Wind Direction: SE
Wind Speed: 10 Knots
Sea State: 1
Swell(s) Height: 3-4 Foot
Sea Temperature: 80.6°F (27°C)
Barometric Pressure: 1010 MB
Visibility: 10-25 Nautical Miles
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 March 24, 2009 4:34 AM

what's to eat today?
Breakfast
Eggs
Bacon and sausage
Oatmeal and raisin cookies
Hash browns and hot cereal
Mangos and melons
Dry cereal

Lunch
(At the Lava Tube Restaurant, Santa Cruz Island, Galapagos)
Mini Pizzas
Spaghetti with tomatoe sauce
Broiled Chicken and Vegetables
Fruitcake, coffee, tea

Dinner
Spaghetti with Meatballs
Salad Bar
Vegetables
Cherry Pie and Ice Cream


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 March 26, 2009 9:56 AM

Tortoises and volcanoes on Santa Cruz Island
April 21, 2000
By Clare Williams and Erin Todd

Yesterday was truly a day we shall remember! Early in the morning, we headed out to the Charles Darwin Research Center in Puerto Ayora on Santa Cruz Island. The Center was created in the 1960’s as a research and breeding center for endangered animal species of the Galapagos Islands, including tortoises, terrestrial and marine iguanas, and several species of birds. After the islands were discovered by sailors and pirates in the 1600s, many animals were killed for food. Because the giant tortoises can go without food or water for many months, they were prized as food sources by early sailors. The killing of tortoises for food, and the introduction of non-native animals, such as goats, rats, dogs, and cats, have had very dramatic effects on the indigenous (native) population of Galapagos tortoises and lizards.

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 March 28, 2009 3:26 AM

We visited the tortoise breeding and rearing center where endangered species of tortoise are hatched and cared for until they are about 5 years old. Only then are they old enough to protect themselves in the wild. Did you know that tortoises can live to be 150 years old? We were lucky enough to meet Lonesome George, the last surviving member of the Pinto Island species of tortoise. We were able to get close to a few of the adult tortoises that are kept in outdoor enclosures. It was fascinating to watch them eat and move around.  [ send green star]
 
 April 11, 2009 9:13 AM

It was then up into the highland jungle of Santa Cruz to see some of the volcanic features of the island. At our first stop, we followed a very narrow path that took us through some tall grasses and dense trees, making some of us wish we had a machete to help clear the way. But what a sight at the end -- a dramatic view of a giant pit-crater over 100 meters deep. Pit craters form when heat coming up from molten rock underground melts and loosens the surface rocks. When that happens, the entire area collapses inwards, leaving a huge, steep-walled hole in the ground. The ones that we saw were very old, and many years of vegetation had grown on their floor and walls.  [ send green star]
 
 April 13, 2009 10:23 AM

Our second stop was to see a lava tube that the owner of a rustic guava plantation had found on his property. As he tells it, some years ago he noticed that he was missing some horses. He started smelling a foul odor, and decided to investigate the cause. He discovered that his horses had fallen into a “skylight” -- a hole in the roof of a large cave -- that had been covered up with grassy plants. The horses could not escape and had died. He and his son decided to see how far the cave went. What they had found was not a simple cave, but a large lava tube that ran right under his property and all the way down to the ocean, over 30 kilometers away!  [ send green star]
 
 April 15, 2009 3:24 AM

A lava tube is a long tunnel whose walls are made of lava rock. It forms when the surface of a lava flow cools, but the lava inside remains molten, so it can continue to flow. How can this happen? Just like the Thermos bottles or insulated cups that people use to keep their coffee hot, the tube “insulates” the molten rock inside. At the end of a volcanic eruption, the molten lava flows down the hill and out the end of the tube, and the tunnel empties. This leaves a tube-shaped cave with walls of lava. It was pretty spooky and mysterious walking through a tube that many years ago served as a pipe for transporting lava! The walls and ceiling were decorated with bizarre and interesting rock formations, and there were a few places where we walked on a bridge to cross over huge cracks in the ground. We felt just like Indiana Jones! It took half an hour to walk through the tube, and when we got to the end, there was a single ladder up to a small skylight above. It was really cool seeing the ladder illuminated out of the gloom by the small amount of light coming through the skylight. As we climbed out of the cave, we were shocked by how much cooler the temperature was inside the cave than outside. This was an experience that we won’t soon forget!  [ send green star]
 
 April 17, 2009 4:33 AM

Parents of two of our students were inspired to write limerick�s about their sons -- here they are!

From Ben Wigham's parents in Grenada:
There was a young scientist called Ben,
Who forgot how to pick up a pen.
His Mum and Dad said,
�E-mail us instead,
Or we�ll fly over and kidnap the hen!�

From Erin Todd's Dad:
There was a young man from Palm Beach,
Who found everything easily in reach.
For a time he was a debater, and later a ’Gator,
There were times he would learn, and times he would burn,
Many beers he could drink -- between times he would think.
When he went on a cruise, he had the Pollywog blues.
After hard work and a dance, he earned his Shellback pants!
Now his beard grows long, as he breaks into song
With a two handed slap, it’s back to his Rap!
The music is loud, but there's none that’s more proud
as the Rap man’s Dad, sitting back in his pad,
Watching pics of his son, his man on the run
in the bright Pacific Sun...

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 April 19, 2009 5:15 AM



View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly cloudy with haze
77°F (25°C)
Latitude: 0 deg 12.5’S
Longitude: 91 deg 48.5’W
Wind Direction: n/a
Wind Speed: calm to light airs
Sea State: 0
Swell(s) Height: 3-4 Foot
Sea Temperature: 77°F (25°C)
Barometric Pressure: 1010 MB
Visibility: 5-10 Nautical Miles
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 April 21, 2009 4:58 AM

what's to eat today?
Breakfast
Ham and cheese omelet
Fruit filled pancakes
Banana bread
Hash browns and hot cereal
Bacon and sausage
Eggs to order
Mangos and melon
Dry cereal

Lunch
Beef Stroganoff
Egg noodles
Turkey soup
Buttermilk Biscuits
Salad bar

Dinner
Baked Salmon in lemon and garlic
Rosemary rice
Curried lentils
Fresh wheat rolls
Salad bar
Cream puffs




Click here to see baby tortoises from Santa Cruz.  [ send green star]
 
 April 23, 2009 7:03 AM

Eat It 'N' Beat It - Cooking for 50 on RV Melville!
April 22, 2000
By Dan Engelbrecht

Imagine stocking your kitchen with everything your family needs for 48 days -- and then try doing it for 50 people! That’s a challenge -- especially with the limited storage space (called stowage) and refrigeration on board. There is never any wasted space; we pack supplies into every inch! After we load the ship at the beginning of each expedition, it can be quite difficult to find what you need. So, for the first week, meals tend to be made of whatever is easiest to get to!

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 April 25, 2009 4:41 AM

Working as a Marine Cook is one of the most challenging jobs on board an oceanographic research vessel. Up at 5:30 every morning and on the go until 6 in the evening, the Cooks’ day is one of the longest compared to other positions on the ship (except for the Chief Scientist, of course!). The cooks that are best at the job tend to be a little clairvoyant! They use their psychic abilities every day, deciding what to make that will keep everyone happy. The ship’s schedule of watch standing, and the spirits of everyone on board, revolve around meals. Not only do meals have to be on time, but they also have to be yummy! This requires that the Cook be creative and serve meals on time -- 3 times a day, everyday. When it is mealtime, you had better be ready! Sore necks are a constant bother to us because we are constantly looking up at the clock to check the time! When the meals are over, the scientists and crew are expected to leave quickly so that clean-up can begin. We have a saying here in the galley -- “Eat it ’n’ Beat it”. I think I just like saying it!  [ send green star]
 
 April 28, 2009 2:14 PM

Cooking is only about 60% of the job. From sweeping and mopping the mess hall and galley, to stocking coffee, sugar, and ice cream bars, the Marine Cook has plenty to do while at sea. But one of the most interesting challenges to a Marine Cook is shopping while visiting foreign ports. What you want and what you get are usually two different things! You learn to become multilingual as time goes on. Most of us don’t know how to say “Where is the post office?” in another language, but we can ask “How much for the cucumbers?” Even more fun is trying to figure out what’s inside a foreign-labeled package after it’s been stowed awhile. You think you’re opening a can of tomato sauce -- and you find that it’s really apple sauce! Now, instead of having “Linguini with Marinara” for dinner, you’re having “Linguini ala Manzana.” Very creative, I think!  [ send green star]
 
 April 29, 2009 7:37 AM

On board the RV Melville, we try hard to produce balanced meals to keep the scientists and crew healthy. Today, Marine Cooks are faced with an increase in “vegetarianism” among the scientific parties that come on board. Long gone are the days of “meat and potatoes”; now, it’s “tofu and sprouts”. What a difference a generation makes! However, we have a solution -- it’s called “The Salad Bar”. If you don’t want the prime rib and crab legs, you can help yourself to one of many vegetable salads. Why someone wouldn’t want prime rib and crab legs is beyond me!  [ send green star]
 
 May 01, 2009 1:46 PM

During each expedition, the amounts of various food items that we use are pretty enormous! Here are just a few items and the amounts that will be consumed completely during this 48 day, 50 person expedition:

Eggs 360 dozen (that’s 4320!)
Juices 240 gallons
Milk 144 gallons
Flour 360 lbs.
Sugar 220 lbs.
Coffee 192 lbs.
Rice 150 lbs.
Lettuce 288 heads
Potatoes 650 lbs.
Ice Cream Bars 1152 (Wow!)

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 May 03, 2009 4:13 AM

Keep in mind that these are just 10 of over 850 that we use, and that have to be ordered again when stock is low. So how big is your grocery list when you go shopping? Because we spend lots of money on groceries, we have to “buy smart”. For example, buying pineapples in Hawaii is smart; buying coconuts in Alaska is not! Whatever port the Melville is in, for the Marine Cook: “It’s not just a job...it's an adventure!”



View Today's Slideshow!
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 May 05, 2009 5:14 AM

partly cloudy weather

TODAY'S WEATHER
Blue skies with haze
77°F (25°C)
Latitude: 0 deg 27’S
Longitude: 91 deg 48’W
Wind Direction: n/a
Wind Speed: calm to light airs
Sea State: 0
Swell(s) Height: 3-5 Foot
Sea Temperature: 73.4°F (23°C)
Barometric Pressure: 1010 MB
Visibility: 5-10 Nautical Miles

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 May 07, 2009 5:25 AM

what's to eat today?
Breakfast
Huevos Rancheros
French toast
Coffee cake
Cottage fries and hot cereal
Bacon and sausage
Eggs to order
Melon and mangos
Dry cereal

Lunch
BBQ Pork loin
Parsley potatoes
Spanish soup
Corn bread
Salad bar
Assorted cookies

Dinner
Chicken Fajitas
Rice and beans
Mexican corn
Jalapeno casserole
Salad bar
“Maya’s Birthday Cake”- Carrot cake with homemade frozen peach yogurt


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 May 09, 2009 8:52 AM

Mapping submarine volcanic rift zones on Fernandina Island
April 23, 2000
By Dan Fornari, Mark Kurz, Mike Perfit and Dan Scheirer

If you have looked at the Plate Tectonics module in the Deeper Discovery section of the web site, you know that many volcanoes occur at the edges of plates that move either towards each other or away from each other. However, there are other groups or “chains” of volcanoes that develop in the middle of tectonic plates. They often form lines of volcanoes that are created as the tectonic plates move over “hotspots” -- plumes of hot material that rise through the mantle. Linear chains of islands and seamounts (volcanoes whose tops do not reach sea level), such as the Hawaiian Islands and Emperor Seamount Chain, and groups of islands, like the Galapagos Islands, are example of hotspot volcanic chains. Each island may be made of one or more individual volcanoes. Fernandina Island, the westernmost island in the Galapagos archipelago, is an island formed by a single volcano named “La Cumbre”.

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 May 11, 2009 11:39 AM

La Cumbre volcano is the most active volcano in the Galapagos Archipelago. It rises 4600 feet above sea level and has young lava flows over all its slopes. It last erupted in 1995 on its southwestern flank. Fernandina is in one of the most remote areas in the Galapagos Islands, and there are no permanent human inhabitants. For this reason, there are not very good records of many of the eruptions. One of the best described eruptions occurred in 1968, when a huge ash cloud was seen for many miles. When a team of volcanologists reached the summit after the eruption, they saw that the caldera floor had dropped by almost 1000 feet! This was caused by the rocks on the caldera floor collapsing into the hole left behind by the erupting magma. The caldera is now 5 miles across and 3300 feet deep. Although geologists have collected samples from the parts of the volcano that are exposed, there has been very little work on the submarine part of Fernandina. That is surprising when most of the volume of the volcano is underwater (see the slideshow for a 3-D image of the western submarine flank of Fernandina we made using the multibeam data we collected).  [ send green star]
 
 May 13, 2009 8:04 AM

The most recent eruption in the Galapagos Islands occurred in 1998 at Cerro Azul, which is the southernmost volcano on Isabela Island -- the biggest island in the archipelago. Isabela has five active volcanoes: Cerro Azul, Sierra Negra, Alcedo, Darwin, and Wolf (from south to north). Although there have been other eruptions in the Galapagos, the two western islands of Isabela and Fernandina are where the action is for volcanologists!

Fernandina and Isabela Islands have also been visited by other explorers. In 1835 during a five-week visit to the islands, Charles Darwin visited Tagus Cove, which lies on the western shore of Isabela Island. The cove is in the middle of a small volcanic ash cone -- one of several that formed during an eruption of Darwin Volcano. When the hot, flowing lavas from Darwin Volcano ran into the cold ocean water, explosions created volcanic ash that was then deposited in a circle around the place where the lava entered the sea.

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 May 15, 2009 5:34 AM

This afternoon, RV Melville sailed down the Bolivar Canal (the narrow channel between Isabela and Fernandina Islands), and entered Tagus Cove. We got a great look at this historical site! Tagus Cove was named after the British naval ship, Tagus, which landed there in 1814 in search of tortoises. The cove was also used as a refuge for pirate and whaling ships in the 1700-1800s. Sailors carved their ships’ names into the soft volcanic ash rock that forms the cliffs of the cove. Although we could not see them from the ship, we are told that if you look closely, you can see the names of vessels going back to the 1700’s. Today, it is illegal to mark the walls of Tagus Cove, but the historical graffiti serves as a vivid reminder of the many people who have visited the Galapagos Islands through the centuries.  [ send green star]
 
 May 17, 2009 6:03 AM

Over the past three days, we have been multibeam mapping and sampling lava west of Fernandina Island. This evening, we headed back to Academy Bay on Santa Cruz Island to drop off Mark Kurz and Josh Curtis (both from Woods Hole Oceanographic Institution), and the three official Ecuadorian observers who were out with us for the past 3 days. Tomorrow, RV Melville will steam at full speed to the northwest, to the mid-ocean ridge crest along the Galapagos Rift at 97.5°W. At that location, we will be looking for a submarine volcanic eruption that took place about 18 months ago based on the T-phase seismicity recorded by the Autonomous Hydrophone Array. Join us as we explore for and study what may be the youngest mid-ocean ridge volcanic eruption so far on this expedition!  [ send green star]
 
 May 19, 2009 6:46 AM


View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Blue skies with haze
73.4°F (23°C)
Latitude: 0 deg 31’S
Longitude: 91 deg 31’W
Wind Direction: Variable
Wind Speed: 8-10 Knots
Sea State: 1
Swell(s) Height: 3-6 Foot
Sea Temperature: 77°F (25°C)
Barometric Pressure: 1010 MB
Visibility: 5-10 Nautical Miles
 [ send green star]
 
 May 21, 2009 5:36 AM


Breakfast
Creamed chipped beef over toast points
Glazed doughnuts
Walnut Waffles
Hash browns and hot cereal
Bacon and sausage
Eggs to order
Pineapple and melon
Dry cereal

Lunch
Turkey, bacon and Swiss sandwich
Grilled Ahi
Split pea and ham soup
French fries
Salad bar

Dinner
T-bone steaks
Fried shrimp
Baked potato
Green bean casserole
Fresh baked dinner rolls
Salad bar
Easter Cake a la mode


 [ send green star]
 
 May 23, 2009 5:45 AM

In the steps of the HMS Beagle
April 24, 2000
By Dr. Dan Fornari

Almost 165 years ago, the HMS Beagle sailed up the channel between Isabela and Santa Cruz Islands carrying Charles Darwin to several of the islands in the Galapagos Archipelago. Today, we followed the same track as we left these beautiful islands to head north on the last leg of our expedition. Sailing by the young volcanic landscapes on these islands was like looking through the pages of a textbook on volcanoes! There was plenty of wildlife to watch too. Frigate birds, gulls, and boobies swooped and dived for small bait fish that scattered from the bow of RV Melville. Porpoises were herding tuna in the distance, but the ship was going too fast (over 13 knots) for our trolling lines to attract any fish.

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 May 25, 2009 5:31 AM

We have been at sea for over a month -- a long time to be away from home, loved-ones, and friends. One of the reasons we stopped in the Galapagos Islands was to let off two members of our science team who had to return to their universities for other pressing research projects. Rachel Haymon and Paul Johnson have been valued members of our expedition and we were sad to see them leave in Santa Cruz. We wish them a safe and speedy return home. For the rest of us, it is back to the open ocean after the change of pace that the few days working in the Galapagos Islands brought us.  [ send green star]
 
 May 27, 2009 7:08 AM

Soon we will begin working at the final mid-ocean ridge study site for this expedition -- the Galapagos Rift near 2° 08’N Latitude and 97° 34’W Longitude. There, we will be looking for evidence that a volcanic eruption occurred 18 months ago. Our data from the Autonomous Hydrophone Array indicate that a seismic event occurred then -- now we have to show that it was caused by volcanic activity.

We got a great view of the northwest coast of Santa Cruz Island as we sailed northwest up the Isabela Channel. Small islets, like the one in this picture, are havens for marine life and are some of the best SCUBA diving spots in the Galapagos Islands. 

This post was modified from its original form on 27 May, 7:09  [ send green star]
 
 May 29, 2009 5:46 PM

As I write this journal, RV Melville is steaming northwest at 13.5 knots. If we maintain this speed, we will get to our survey area in the early morning hours of Wednesday, 26 April. In the meantime, we are planning our strategy for the DSL-120 sonar and Argo II surveys that we will do in that area. Check in tomorrow for more details on the next survey site and what we plan to do.

 

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 May 31, 2009 9:22 AM



View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
78.8°F (26°C)
Latitude: 0 deg 45’S
Longitude: 90 deg 18’W
Wind Direction: S
Wind Speed: 8 Knots
Sea State: 1
Swell(s) Height: 2-4 Foot
Sea Temperature: 80.6°F (27°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles

 [ send green star]
 
 June 02, 2009 7:39 AM


what's to eat today?
Breakfast
Spanish Omelet
Blueberry pancakes
Quesadillas
Cinnamon rolls
Bacon and sausage
Hash browns and oatmeal
Sliced fruit
Dry cereal

Lunch
BBQ Pork sandwiches
Chili dogs
Oven-glo potatoes
Spanish soup
Salad bar
Butter cookies

Dinner
Savory baked chicken
Sweet potatoes
Rice and vegetables
French bread
Salad bar
Pudding and cream
 [ send green star]
 
 June 05, 2009 6:22 AM

Next Stop, the Galapagos Rift
April 25, 2000
By Dr. Dan Fornari

RV Melville sliced through the broad low swells of the equatorial Pacific Ocean today at an average speed of 12.3 knots. At 1900 hours (our local time), we were 72 nautical miles from our final survey site, the Galapagos Rift near 97° 30’W Longitude. Try to estimate when we will arrive there Wednesday morning. I'll give you our exact arrival time in tomorrow’s update.

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 June 07, 2009 7:54 AM

After more than 30 days at sea, some familiar foods have started to run out. The cooks on board RV Melville are doing a great job of keeping us well-fed, healthy and in good spirits, but after such a long time away from home and the comforts of our normal, shore-based lives, we start to miss some of the little things. Here are some of the foods we have run out of: English muffins, salad lettuce, granola cereal and strawberries. BUT, we still have plenty of melons, pineapples and mangoes for breakfast, cabbage for slaw, meats and poultry, and, of course, just about all the fresh fish we could ask for. The wahoo that the “Daves” caught yesterday was our main dish at supper today. It was FANTASTIC! Dan Engelbrecht, the head cook, promises to reveal the recipe, and I’ll post it on the Web site.  [ send green star]
 
 June 09, 2009 5:32 AM

Today, people took the opportunity to catch up on work and rest and prepared to survey the final area we will study on this expedition. There are several very interesting things about this site. First, very little is known about the mid-ocean ridge in this area. It is called the Galapagos Rift because it is close to the Galapagos Islands. At the Galapagos Rift, the Cocos and Nazca plates are spreading apart at about 6 centimeters per year. That speed is about half as fast as the areas on the East Pacific Rise that we mapped earlier during this expedition. No rock samples have ever been recovered from this area. Mike Perfit confirmed this by combing through every existing petrological data base on ocean floor rocks. Also, until last week, no detailed bathymetric map of the area existed, so we had no good idea about the structure of the ridge axis at this site. We collected multibeam data on one survey line last week when we were headed toward the Galapagos Islands. We plan to collect additional data early tomorrow morning. You can see a 3-D perspective of the bathymetry data that we collected last week in today's slide show. The area where we believe the most volcanic activity takes place lies in a 4.5- kilometer-wide rift valley. The shape of the ridge axis is different from that at the crest of the East Pacific Rise at 9-10°N, 3° 20'N or 1° 45'N, which we surveyed earlier during this expedition. Data from the Autonomous Hydrophone Array, which Maya Tolstoy, Julia Getsiv and Chris Fox, our NOAA shore-based collaborator have been analyzing, indicate that that between August 31, 1998, and September 12, 1998, 335 seismic events occurred in the Galapagos Rift valley near 97° 30’W. Most of the events happened in the first few days, and it appears that the epicenters of the seismic events “migrated” along the rift valley as time passed. That indicates that magma rose from the mantle in a long thin channel called a dike, which moved up and away (or “ropagated” from the original source of the magma. Did the dike reach the seafloor and erupt there? That’s what we’re going to try to find out over the next nine days.  [ send green star]
 
 June 11, 2009 5:51 AM

Starting tomorrow morning, we have planned DSL-120 surveys of the entire floor of the rift valley for about 25 nautical miles along the ridge axis. Based on our previous experiences during this expedition, this will take us about 2.5 days. We can’t wait to discover what this part of the mid-ocean ridge axis looks like and to find young lava flows that would be evidence that a seafloor eruption took place in 1998.



View Today's Slideshow!

overcast weather

TODAY'S WEATHER
Overcast
86°F (30°C)
Latitude: 1 deg 14’N
Longitude: 94 deg 40’W
Wind Direction: n/a
Wind Speed: calm
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1013 MB
Visibility: 10-25 Nautical Miles

 [ send green star]
 
 June 13, 2009 6:01 AM


what's to eat today?
Breakfast
Steak and egg burrito
Banana nut bread
Waffles and sausage
Hash browns and hot cereal
Eggs to order
Mangos and melon
Dry cereal

Lunch
Beef short ribs
Mashed potatoes with gravy
Buttermilk bisquits
Shrimp bisque
Baked beans
Salad bar
Assorted cookies

Dinner
Parmesan Wahoo
Fettuccine Alfredo
Rice pilaf
Fresh baked dinner rolls
Salad bar
Lemon cake a la mode
 [ send green star]
 
 June 15, 2009 12:01 PM

Surveys and visitors at the Galapagos Rift
April 26, 2000
By Dr. Dan Fornari

For the last time on this expedition, we have begun our detective work to find a young volcanic eruption -- this time at the Galapagos Rift. We arrived here at 0047 hours local time, or 0647 hours GMT (Greenwich Mean Time) today -- how does that match your calculation based on the information I gave you yesterday? The first step in collecting evidence -- our multibeam bathymetry survey -- took about seven hours. Just after breakfast, we were at the launch position for the start of the DSL-120 sonar survey. Calm seas helped the DSL-120 sonar launch this morning go smoothly. If all goes as planned, in about 2.5 days, we will have a detailed sonar image of the 4.5 kilometer-wide rift valley where spreading is separating the Cocos Plate from the Nazca Plate to the south. Each of our sonar survey lines is about 20 nautical miles, or 37 kilometers, long. It will take us about 12.5 hours to run each line. Can you calculate what speed we are towing the DSL-120 sonar fish? (Hint: look at the March 25th Daily Journal for information on calculating speed if you know the time and the distance.) We will post the answer in tomorrow’s Daily Journal along with some images of the sonar data we have collected so far.

 [ send green star]
 
 June 17, 2009 6:22 AM

This afternoon, we were busy with visitors! Several pods of short-finned pilot whales came by. They dove and surfaced around the ship for about 15 minutes before they swam away. Then, about mid-afternoon, we were buzzed by a small helicopter, like the ones used by tuna boats to scout for schools of fish. A short while later, we spotted two fishing vessels coming over the horizon. One of the ships, the Maru#18, was a Japanese long-liner (a ship that uses long lines of baited hooks to catch large, open ocean fish like tuna). They had strung their fishing line out in front of the RV Melville. Not the best of situations while we were towing the DSL-120 sonar system! We were able to raise the Maru#18 on the radio, and they kindly recovered their fishing line before we crossed over it. It was good to have company, even briefly, out in the middle of the ocean!  [ send green star]
 
 June 19, 2009 5:23 AM

Dan Engelbrecht’s Dynamite Parmesan Wahoo

Everyone loved the way Dan Engelbrecht prepared the fresh Wahoo we had for dinner last night. We have the “Dave’s” to thank for hauling it in, but Dan tickled our taste buds last night with his “Parmesan Wahoo” recipe. Here it is for you all to enjoy.

Ingredients:
Grated Parmesan Cheese
Mayonnaise
Dry White Wine
Dill Weed
White or Brown Onions, sliced thinly
Fresh Wahoo (also called “Ono” in Hawaii; the word that means “very good”

 [ send green star]
 
 June 21, 2009 5:38 AM

1) In a bowl, mix equal amounts of cheese and mayonnaise. Add white wine to thin the mixture into a batter consistency. Add dill weed (fresh if possible) to taste. Make enough to coat all sides of the Wahoo generously.

2) Cut the Wahoo into 2 inch thick pieces, removing all skin and bones.

3) Lightly grease a glass or stainless baking dish that is large enough for all the fish pieces.

4) Take the sliced onions and cover the bottom of the baking dish.

5) Dredge the Wahoo in the batter and place on top of the onions in the baking dish.

6) Bake at 400°F for 20-25 minutes or until the top of the fish is golden brown and the fish flakes easily.

7) Serve immediately with wedges of lemon for garnish.

8) Eat and enjoy!

 [ send green star]
 
 June 23, 2009 7:16 AM



View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
84.2°F (29°C)
Latitude: 2 deg 7’N
Longitude: 97 deg 26’W
Wind Direction: E
Wind Speed: 6 Knots
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1010 MB
Visibility: 10-25 Nautical Miles
 [ send green star]
 
 June 25, 2009 7:05 AM


what's to eat today?
Breakfast
Ham & Cheese Omelet
French Toast
Pound Cake
Bacon & Sausages
Hash Browns & Hot Cereal
Eggs to Order
Fresh Mangoes and Melon
Dry Cereal
Juices

Lunch
Cheese Burgers
French Fires
Minestrone Soup
Salad Bar
Fresh “Aku” Tuna Sashimi
Pumpkin Bars

Dinner
Roasted Pork Loin
Mashed Potatoes w/Gravy
Beets and Broccoli
Fresh “Aku” Tuna Sashimi
Salad Bar
Blueberry and Cream Cheese Blintz
Homemade Vanilla Ice Cream




Click here to see pilot whales swimming next to RV Melville.  [ send green star]
 
 June 27, 2009 8:46 AM

Being Prepared
April 27, 2000
By Dr. Dan Fornari

Yesterday, we asked you to calculate how fast we are towing the DSL-120 sonar fish. Well, the answer is -- 1.6 knots (nautical miles per hour). Did you get it right?

We are now about half way through our survey of the Galapagos Rift valley floor in this area. We are busy processing and analyzing the data looking for evidence of young volcanic lava flows that will be the target of our rock sampling and Argo II surveying. That phase of our work will begin on Saturday. If you check out the image of the seafloor in today’s slide show, you will see that it is much rougher and more complicated than the seafloor at our other study sites. That makes it more difficult to process our sonar data, so it takes us a bit longer to produce the images. But, by tomorrow, we will be able to show you some data.

 [ send green star]
 
 June 30, 2009 11:31 AM

Today, we enjoyed the company of several pods of pilot whales and playful dolphins. For most of the day, the pilot whales, and what we believe were bottlenosed dolphins, swam gracefully around the ship. At times, the dolphins jumped completely out of the water, did back-flips, and slapped their tails, as the pilot whales continued their slow graceful swimming around the ship.

While we survey, others on board work to keep the ship operating. When equipment has to be repaired, we have to be able to do it with what is on board. There are no hardware stores, repair shops, or other facilities that we can go to. We have to rely on the supplies we brought with us, and the skills and experience of the engineers, mechanics, and technicians on the ship. Today’s slide show features several photos of the different equipment repair shops on the ship that house equipment and supplies needed to keep both RV
Melville running properly, and the DSL-120 and Argo II survey systems collecting good data. Having the right shipboard supplies and tools, keeping them well-stocked from cruise to cruise, and having good people on board who have experience at fixing lots of different things is key to successful oceanographic research.
 [ send green star]
 
 July 02, 2009 11:26 AM


 

View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
86°F (30°C)
Latitude: 2 deg 8’N
Longitude: 97 deg 35’W
Wind Direction: n/a
Wind Speed: <1 Knot
Sea State: 1
Swell(s) Height: 3-4 Foot
Sea Temperature: 86°F (30°C)
Barometric Pressure: 1010 MB
Visibility: 10-25 Nautical Miles

 [ send green star]
 
 July 04, 2009 7:35 AM

what's to eat today?
Breakfast
Spinach & Jack Cheese Omelet
Oat Bran Muffins
pancakes & Sausage
Hash Browns & Hot Cereal
Eggs to Order
Fresh Pineapple and Mangoes
Dry Cereal
Juices

Lunch
Rolled Tacos
Rice & Beans
Nachos
Ensenada Soup
Salad Bar
Strawberry Jello

Dinner
Veal Parmigiana
Spaghetti with meat sauce
Fried Calamari
Spinach & Garlic
Fresh Baked Garlic Twists
John Boing Birthday Cake

 [ send green star]
 
 July 06, 2009 6:49 AM

Making Maps of the Seafloor
April 28, 2000
By Dr. Dan Fornari

Finally, some rain! For the first time in several weeks, RV Melville got a freshwater wash this morning thanks to numerous passing rain squalls that turned the sky gray and the seas choppy. It was a welcome change from the nearly continuous heat and sun we've experienced in the tropics during this expedition.

As I write this Journal, we are hauling the sonar fish up to the surface, having completed the last survey line. It will be on board by 2300 hours, and then we will dredge for young lava based on the maps we’ve been making the past few days.  [ send green star]
 
 July 08, 2009 6:36 AM

Have you ever thought about what it takes to make a map? First, you must know exactly where you are every second of the time you are collecting the data. If you don't know where you are, you can’t make a good map! While we are surveying, we continuously record the ship’s navigation and location, and also that of the mapping system we are using. Scott White and Uta Peckman then go through all the navigation data and analyze it to make sure all the locations are correct. Once this is done, Steve Gegg, Julia Getsiv and Greg Kurras match the sonar data with the navigation data. They do this using the time of each data point in the navigation and sonar files. They then can make detailed images of the seafloor terrain. Remember that the DSL-120 sonar images can resolve features on the seafloor just a bit larger than your dining room table -- pretty amazing considering the seafloor is 3400 meters below us!  [ send green star]
 
 July 13, 2009 3:24 PM

Once we have the DSL-120 sonar images of the seafloor and the multibeam bathymetry maps that Uta Peckman produces -- the fun begins! We put all the maps and images on a light table in the Main Lab. A light table is a table with a glass top with lights inside. With the lights on, you can overlay one type of map over another and see through them. In this way, we can relate the seafloor elevation to the seafloor features that show up on the DSL-120 data. We then try to figure out where recent volcanic eruptions have occurred.  [ send green star]
 
 July 15, 2009 5:35 AM

Based on our analysis of the maps we have made of the Galapagos Rift, we have selected three dredge targets to collect samples of seafloor lava. While we are sampling, the WHOI Deep Submergence Operations Group will switch the fiber optic cable from the DSL-120 to the Argo II imaging system. By tomorrow afternoon, we should have rocks to look at -- hopefully, they will be very fresh! Then we’ll send Argo II down to the bottom of the ocean to collect images of the seafloor for the final time on this expedition!

 [ send green star]
 
 July 17, 2009 7:28 AM

   

View Today's Slideshow!

rainy weather

TODAY'S WEATHER
Rain
78.8°F (26°C)
Latitude: 2 deg 9’N
Longitude: 97 deg 42’W
Wind Direction: W
Wind Speed: 6 Knots
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1011 MB
Visibility: 10-25 Nautical Miles

 [ send green star]
 
 July 19, 2009 7:44 AM

what's to eat today?
Breakfast
Corned Beef Hash and Poached Eggs
French Toast
Pound Cake
Home Fries
Oatmeal
Sausage and Bacon
Pineapple and Melon
“Granola” Cereal!!

Lunch
Honey Glazed Cornish Game Hens
Potato Cakes
Green Beans
Minestrone Soup
Biscuits
Marshmellow Crispy Squares

Dinner
Oven Fried Fish
Orange Rice
Italian Vegetables
Freshly Baked Rolls
Salad Bar
"Strawberries and Cream" Pastry

 

 [ send green star]
 
 July 21, 2009 7:21 AM

"See the dredge - be the dredge"
April 29, 2000
By Dr. Dan Fornari Prof. Mike Perfit

Imagine you are in a helicopter about 2 miles (3500 meters) above your house. You have a winch in the helicopter that lets you lower a line and a basket to scoop up things that are laying on the ground around your neighborhood. However, clouds block your view, so you have to do this without being able to see where the basket is or where the objects are. You have a map of what’s down there, but you cannot see anything! All you know is the position of the helicopter, your height above the ground, and how much of the line you have let out to drag the basket over the ground.

 [ send green star]
 
 July 23, 2009 7:34 AM

What we’ve just described is what we do to dredge rocks from the seafloor! We've made our detailed maps, our navigation systems are all tuned up, and we have selected seafloor targets. Now, the technique and “art” of dredging come into play. We, together with Ron Comer, are old hands at dredging. With the RV Melville hovering above the seafloor about 3400 meters below, the process begins! First, we lower the heavy dredge with the chain bag over the side of the ship. Then the winch operator lets out about 150 meters of the 9/16 inch diameter steel wire wound on the drum of the winch. Next, we put the pinger on the wire. The pinger is the sound source that “ings” ever second at a frequency 12 kiloHertz so that we can tell when the dredge is on the seafloor. Then the winch operator lowers the dredge to the seafloor and we move the ship slowly along the dredge track.  [ send green star]
 
 July 25, 2009 6:37 AM

When we dredge, we imagine ourselves on the seafloor, at the mouth of the dredge. Our motto is: “See the dredge, be the dredge”! From experience and the maps that have been made, we know what the seafloor slope is, what kinds of volcanic features are on the ocean floor, and what is the best direction to drag the dredge (usually up the steepest slope). As we pull in and let out the wire to keep the dredge moving across the seafloor, we “feel” the bites that the dredge makes. Bites are what all dredgers like to see -- an increase in the tension on the wire followed by the sudden release of tension when the rocks break free. Hopefully, those rocks end up in the dredge bag!  [ send green star]
 
 July 26, 2009 4:37 PM

Last night and through this morning, we dredged the seafloor of the Galapagos Rift valley. At two of the volcanoes mapped during our multibeam and DSL-120 sonar surveys, the lava was VERY fresh. Some of the rocks had whitish bacterial slime on them. This is a very important key to looking for newly erupted lava! We know that when there is a volcanic eruption on the seafloor, large amounts of bacteria quickly start growing on the rocks. This is probably in response to the heat of the lava flow, and chemicals that are added to the bottom water from seafloor eruptions and possibly hydrothermal venting. We now need to see more of the seafloor in this area to map out the lava flow and look for hydrothermal activity! To do that, we are towing Argo II about 10 meters above the seafloor at a speed of 0.5 knots. Check back tomorrow for some images and video of the seafloor and see what we've discovered!  [ send green star]
 
 July 29, 2009 7:30 AM


    View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
84.2°F (29°C)
Latitude: 2 deg 10’N
Longitude: 97 deg 45’W
Wind Direction: Variable
Wind Speed: 6 Knots
Sea State: 1
Swell(s) Height: <3 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles
 [ send green star]
 
 July 31, 2009 7:25 AM



what's to eat today?
Breakfast
Fried Egg Sandwitch
Banana Bread
Waffles & Sausage
Hash Browns & Hot Cereal
Eggs to Order
Fresh Melon and Mangoes
Dry Cereal
Juices

Lunch
Egg Foo Yung with Ginger Sauce
Fried Rice
Stir-Fry Vegetables
Miso Soup
Egg Rolls
Salad Bar

Dinner
Rack of Lamb
Couscous
Potatoes in Cream Sauce
Cabbage with Dill
Fresh Baked Wheat Rolls
Salad Bar
Strawberry Chiffon Pie


 [ send green star]
 
 August 01, 2009 6:32 PM

Rock Talk
April 30, 2000
By Prof. Mike Perfit

For the past month, we have been mapping the seafloor, collecting images of volcanic lavas, and sampling the rocks. Have you been wondering what the lavas are made of and what the interiors of the rocks look like?

Rocks are made up of minerals, and are given different names depending on the minerals in them and their chemical composition. The samples we have been collecting are a type of rock called “basalt”, and they are called Mid-Ocean Ridge Basalts, or MORB for short. Basalts are also the rock type that erupts on oceanic islands, like the Galapagos and Hawaii. But they are slightly different in chemical composition (in particular, they contain more water) and so are called Ocean Island Basalts, or OIBs for short.

 [ send green star]
 
 August 04, 2009 8:31 AM

When magma (the name given to molten rock) cools, minerals start to crystallize. The more the magma cools, the more it transforms into solid crystals. If cooling is slow, then the crystals have time to grow quite large. On the other hand, when magma erupts rapidly on to the seafloor and meets the very cold seawater at the bottom of the ocean, it does not have time to form many crystals. Instead, the surface of the molten rock “freezes” or “quenches” and forms a clear, brown glassy material. Because MORB always erupt underwater, they tend to have outer crusts that are made almost entirely of glass. The interior of the lava cools more slowly because the glassy outer rind insulates the hot magma from its cold surroundings. As the interior slowly cools, more crystals form, and the crystals also grow larger.  [ send green star]
 
 August 06, 2009 8:14 AM

Geologists determine what minerals are in a rock by taking very thin slices of rocks that you can almost see through! They then look at them under a special microscope. Take a look at slides 3 and 4 in today’s slide show to see how pretty a black rock really looks under a microscope! Slide 3 shows the cooled interior of a pillow basalt; slide 4 shows a very thin slice of the outer rind of a MORB.  [ send green star]
 
 August 08, 2009 9:02 AM

Minerals in basalts tell geologists about the chemical composition of the magma and the temperature at which the minerals crystallized. The two most common minerals in basalt are called olivine and plagioclase. Olivine is a mineral made mostly of magnesium, silicon and oxygen. Olivine crystals are olive-green, and they generally have a round shape. When these minerals are large and of high quality, they are known as the gem “eridote”. In MORB, olivine usually occurs as tiny individual crystals in clumps with plagioclase. Plagioclase is a mineral made mostly of calcium, aluminum, silicon and oxygen. Plagioclase crystals are often seen as rectangular crystals with smooth, glassy to white surfaces. Either olivine or plagioclase is the first mineral to crystallize in MORB. The other mineral that is commonly found in the more slowly cooled interior of MORB lava, is called pyroxene. It is made mostly of calcium, magnesium, silicon and oxygen, and often occurs in radiating groups with plagioclase. You can see all these minerals in today’s slide show!  [ send green star]
 
 August 09, 2009 4:59 PM

   

View Today's Slideshow!

clear weather

TODAY'S WEATHER
Clear
82.4°F (28°C)
Latitude: 2 deg 9’N
Longitude: 97 deg 41’W
Wind Direction: n/a
Wind Speed: calm
Sea State: 0
Swell(s) Height: 3-5 Foot
Sea Temperature: 87.8°F (31°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles

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 August 12, 2009 6:45 AM

what's to eat today?
Breakfast
Cheese Omeletes
Pineapple Pancakes
Hash Browns & Hot Cereal
Eggs to Order
Fresh Melon and Mangoes
Dry Cereal
Juices

Lunch
Grilled Ahi Sandwitch
French Fries
Split Pea Soup
Spanish Beans
Salsd Bar
Sugar Cherry Cookies

Dinner
Prime Rib
Shrip Scampi
Baked Potatoes
Calico Corn
Fresh Baked Dinner Rolls
Salad Bar
Apple Turnovers
Homemade Cinnamon-Walnut Ice Cream

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 August 14, 2009 6:28 AM

Single Digits!
May 1, 2000
By Dr. Dan Fornari

Nine days and counting! Despite our great successes out here in the balmy Pacific Ocean, everyone is getting anxious for the cruise to end. After 38 days at sea (albeit with a very enjoyable port stop in the Galapagos Islands!), both the science team and ship’s crew are looking forward to getting back to port and, for those going home, back to family and friends.

Work at the end of a long expedition becomes more difficult. People are tired, both physically and mentally! The long hours and concentration required to keep RV Melville and the deep submergence vehicles in top condition and running perfectly take a physical toll on everyone. Quickly processing and analyzing the enormous amount of data we have collected to help us decide where we need to do more mapping and sampling, is mentally very demanding. As the cruise goes on, we have to be very careful not to make mistakes or wrong decisions because we are tired. We check every action and every decision at least twice!

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 August 16, 2009 6:01 AM

We pulled Argo II up from the depths of the Galapagos Rift valley this afternoon after collecting nearly 36 hours of observations along the volcanic axis of the rift valley. Check out the videos of some of the volcanic terrain we have seen, and the digital images of the seafloor in today’s slide show. While we have found some glassy young lava in a few of the dredges, we still have not imaged a very young (18 months old) seafloor lava flow. We have about 5.5 days left to complete our work here before we head for port. We are now carefully reviewing again the DSL-120 sonar data, the earthquake data, and the rocks we’ve collected to make sure that our plan for mapping and sampling different areas in the rift valley is the best one for the time we have left. Like any good experiment or detective story, we’re using all the available evidence and techniques at our disposal to try to solve the problem!  [ send green star]
 
 August 18, 2009 7:01 AM

   

View Today's Slideshow!

showers weather

TODAY'S WEATHER
Cloudy with passing showers
82.4°F (28°C)
Latitude: 2 deg 12’N
Longitude: 97 deg 43’W
Wind Direction: E
Wind Speed: 10 Knots
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1011 MB
Visibility: 10-25 Nautical Miles

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 August 20, 2009 7:04 AM

what's to eat today?
Breakfast
Pumpkin Rasin Muffins
Walnut Waffles
Bacon & Sausage
Hash Browns & Hot Cereal
Eggs to Order
Fresh Melon and Pineapple
Dry Cereal
Juices

Lunch
Hot Links, Polish Sausage and Bratwurst
Onion Rings
Pasta Shells in Meat Sauce
Mushroom & Beef Soup
Salad Bar
Blueberry Pan Pie

Dinner
Blackened Chicken
Cajun Rice
Spicy Lentils
Cajun Cauliflower
Fresh Baked Corn Rolls
Chocolate Chip Cookies and Ice Cream


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 August 22, 2009 7:37 AM

Monster Rocks!
May 2, 2000
By Dr. Dan Fornari

There’s an old saying: “Be careful what you wish for - you may get it!” We have wished for lots of good samples of fresh lava from the seafloor. Well, two of our dredges have grabbed “monster” rocks from the Galapagos Rift valley. Each one must weigh about 100 kilograms. Today’s slide show has a photo of one of them.

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 August 24, 2009 5:10 PM

The past day’s sampling work has been very successful, and we have retrieved a variety of lava from the rift valley floor. Some of the lava appears to be old--the glass is not very shiny and has a coating of manganese oxide, which gives it a dull, black-brown color. But other samples we have collected are very glassy and include pillow lava, lobate lava, and sheet lava--some with very interesting textures and shapes. One sample we recovered today looks like it has ledges inside it. These form when some lava inside the chilled outer crust of a newly formed pillow drains out quickly from the center. The lava remaining inside continues to cool and forms horizontal layers of crust inside the outer crust. Then, if the pillow cracks and the rest of the lava spills out, what remains is a lava pillow with the original outer crust and one or more inner shelves of lava--like the sample we collected today.  [ send green star]
 
 August 26, 2009 8:15 AM

After a day of sampling, we again deployed Argo II to map the area where we had just dredged in central volcano area in the Galapagos Rift valley. As you can probably tell, we are using a combination of data to figure out the best plan for mapping and sampling over the remaining four days. We still have much to do to complete our objectives.

This evening, some lucky folks up on the bow of RV Melville were treated to a light show. A meteor flashed close by across the night sky. It was so bright that some people thought that they were being photographed with a flashbulb. Meteors are bits of dust, ice and space rocks that enter Earth’s atmosphere and get vaporized. The vaporization creates the burst of light that we see as shooting stars. These kinds of experiences are the ones that we remember for a lifetime. I remember a night at sea several years ago when the sky was clear and filled with stars. I could trace the path of a satellite hurtling across the entire sky, and for several hours the sky was filled with many shooting stars, or meteors. It was better than Fourth of July fireworks!

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 August 28, 2009 8:02 AM


 

View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
84.2°F (29°C)
Latitude: 2 deg 9’N
Longitude: 97 deg 35’W
Wind Direction: S
Wind Speed: 14 Knots
Sea State: 1
Swell(s) Height: 3-5 Foot
Sea Temperature: 78.8°F (26°C)
Barometric Pressure: 1010 MB
Visibility: 10-25 Nautical Miles

     Please stay tuned for Part Three.....

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 August 30, 2009 6:56 AM


what's to eat today?
Breakfast
French Toast
Coffee Cake
Hash Browns & Hot Cereal
Bacon & Sausage
Eggs to Order
Fresh Pineapple and Melon
Dry Cereal
Juices

Lunch
Turkey Pot Pie
Bean Soup
Rice & Vegetables
Salad Bar
Popcorn Balls

Dinner
Baked ham w/Pineapple Sauce
Jefferson Noodles
Succotash
Sweet Potatoes
Corn Bread
Salad Bar
Custard Pie

 [ send green star]
 
 September 01, 2009 8:22 AM

Pollywog to Shellback -- My First Experience at Sea
May 3, 2000
By Clare Williams

It has been nearly six weeks since I arrived in Mazanillo, Mexico. I had never been on a research vessel and I remember thinking: “Forty-eight days with no shops, no phones, no school friends, no nights out and no land! You had better remember to take everything you need, because once you leave port you can’t go back.”

 [ send green star]
 
 September 03, 2009 8:23 AM

My first impression of the 87-meter-long RV Melville was that it is much bigger than I expected, but it would become my little world for the next seven weeks. I was surprised at the amount of equipment everywhere, from hundreds of computers to the deep-sea instruments, Argo and DSL 120.

During the two days before we left port, we familiarized ourselves with the boat, equipment, safety drills, the areas we would work in and what jobs we would be expected to do. When we left Mazanillo, the weather was sunny and the seas calm, but the boat was rolling enough for me to take seasickness medicine for a couple of days, until I got my sea legs. Even with the very calm seas we have experienced throughout this trip, the swell rolls the boat slightly and you get used to not being able to walk in a straight line.

 [ send green star]
 
 September 05, 2009 7:04 AM

Chief Scientist Dan Fornari organized us into watch groups so we can collect data 24 hours a day. Once the watches started, we all had to alter our sleeping patterns to accommodate our watch times. I am on the Mid or 12-4 watch, which means I stay up until 4 a.m. and then sleep until 11 a.m. It doesn’t take long to get used to and most people set up their own routine, which they stick to for the rest of the cruise. Spare time is normally filled with sunbathing, reading, working out, watching movies and the sunset every night, which is a great social event.  [ send green star]
 
 September 07, 2009 9:00 AM

Watch standers have several jobs, depending on which deep submergence vehicle is deployed. When the DSL 120 sonar or Argo II mapping systems are in the water, we work inside the “Control Van,” a converted shipping container that holds the controls for “flying the fish,” navigation and data logging. During each lowering we have to plot the position of the ship and the vehicle, log events, check that the sonar is working, and change the tapes that record the data every few hours. The van has no windows and when Argo is down, the lights are switched off so we can see the camera images more clearly on monitor screens. It’s always a bit of a shock to walk out into blinding sunlight at the end of your watch. If we are dredging or rock coring, we spend most of our time in the Main Lab at the winch controls, lowering and hauling in the wire with the sampling device on the end of it, or out on the fantail retrieving the instruments and rocks. I have also been working in the Rock Lab, helping to identify, bag and clean the rock samples we collect. The watch system is hard work, especially when we are working in the Control Van, and everyone enjoys the small breaks we get when the ship transited from one survey area to the next.  [ send green star]
 
 September 09, 2009 9:07 AM

I really enjoy living onboard Melville. Having all our meals prepared for us is a great luxury. In fact, the only domestic chore we have to do is our laundry, so we have plenty of time to do our jobs. I love being out on the ocean with water as far as the horizon all around you. We are a long way from shipping lanes, so we hardly ever see other vessels and it’s easy to forget that the rest of the world is out there.

The wildlife out here is really abundant. I have seen huge schools of tuna, mahi mahi, flying fish, giant squid and sharks. A pod of pilot whales followed the boat throughout an entire day, and sea lions and porpoises abounded around the Galapagos. The sunsets are almost always spectacular and I saw the green flash for the first time--it does exist! At night, the bioluminescence in the bow wake looks like something out of the movie Fantasia and we can see the Southern Cross, shooting stars --more stars than I have ever seen in the sky. It is it so clear out here.

 [ send green star]
 
 September 11, 2009 7:01 AM

The data we have collected so far have been really interesting. Getting the data is a long and fairly slow process (the ship has to go at about 0.6 knots while towing Argo and about 1.6 knots while towing the DSL-120 sonar). But actually seeing the seafloor, where no one has ever been before, through Argo’s video cameras is great thrill. Watching hydrothermal vents never mapped before, strange animals and the different lava terrains that go by on the video monitors, it sometimes hard to comprehend that this is all going on beneath us. It’s like another planet down there.


Stopping for two days in the Galapagos was a nice change, although I wasn’t desperate to see land as some of the rest of the crew were. Our Shellback ceremony on the transit across the Equator to Santa Cruz Island was definitely an experience. Let’s just say it takes a while for your hair to smell normal again! Snorkeling with sea lion pups is my most memorable experience from the Galapagos. I wold love to go back one day.

 [ send green star]
 
 September 13, 2009 7:00 AM

In one week we will be back in port in Manzanillo, and I can’t believe six weeks have gone by already. I have really enjoyed being out at sea--making good friends, learning huge amounts about marine geology and geophysics and seeing so many amazing places, animals and spectacles of nature. I would particularly like to thank Dr. Dan Fornari for inviting us to come on this cruise, as well as Dr. Rachel Haymon and Dr. Ken Macdonald at the University of California, Santa Barbara, for teaching me a lot and helping to arrange this experience. Fingers-crossed, I will be our here again soon doing more research!

   

View Today's Slideshow!

partly cloudy weather

TODAY'S WEATHER
Partly Cloudy
84.2°F (29°C)
Latitude: 2 deg 10’N
Longitude: 97 deg 42’W
Wind Direction: n/a
Wind Speed: <1 Knot
Sea State: 0
Swell(s) Height: 3-4 Foot
Sea Temperature: 86°F (30°C)
Barometric Pressure: 1010 MB
Visibility: 10-25 Nautical Miles


 [ send green star]
 
 September 15, 2009 9:09 AM

what's to eat today?
Breakfast
Bacon, Peppers & Cheese omelet
Glazed Doughnuts
Pancakes & Sausage
Hash Brown & Hot Cereal
Eggs to Order
Fresh Pineapple and Melon
Dry Cereals
Juices

Lunch
Chicken Fried Steak w/country gravy
Grits
Creamed Potatoes
Tomato Soup
Buttermilk Biscuits
Salad Bar

Dinner
Seafood Italiano
Vegetarian Lasagna
Green Beans Almondine
Garlic Toast
Salad Bar
Strawberry Short Cake

 [ send green star]
 
 September 17, 2009 8:30 AM

There's never enough time!
May 4, 2000
By Dr. Dan Fornari

After 41 days at sea, you would think that we’d be glad to be almost finished with our field work. But, no matter how long a cruise is, there is never enough time to collect all the data and samples we would like! We know that it will be several years before we can come back to this area to do more work. So we must collect as much information as possible to help us answer the scientific questions that brought us out here in the first place.

 [ send green star]
 
 September 19, 2009 6:53 AM

Today we completed the last Argo II lowering of Expedition #3! As I write this journal, there is still lots of activity on board! Steve Gegg is processing the data, and copying it on to many data disks and CDs ready for us to take home. The science team is sorting through maps, making notes, and selecting images and videos of the highlights of our last 10 days of work at the Galapagos Rift valley. Mike Perfit and the watch standers are sending “Mighty-Mo”, the rock corer, hurtling down to the ocean bottom at 100 meters per minute to bash into the seafloor lava flows and collect chips of volcanic glass. We are planning to do 16 more rock cores and 4 dredges before we leave for Manzanillo on Saturday, May 6 at about 1200 hours local time.  [ send green star]
 
 September 21, 2009 12:40 PM

Today we completed the last Argo II lowering of Expedition #3! As I write this journal, there is still lots of activity on board! Steve Gegg is processing the data, and copying it on to many data disks and CDs ready for us to take home. The science team is sorting through maps, making notes, and selecting images and videos of the highlights of our last 10 days of work at the Galapagos Rift valley. Mike Perfit and the watch standers are sending “Mighty-Mo”, the rock corer, hurtling down to the ocean bottom at 100 meters per minute to bash into the seafloor lava flows and collect chips of volcanic glass. We are planning to do 16 more rock cores and 4 dredges before we leave for Manzanillo on Saturday, May 6 at about 1200 hours local time.  [ send green star]
 
 September 23, 2009 6:32 AM

The DSL-120 sonar maps and the Argo II images have provided us with many interesting volcanoes and lava flows that we would like to sample. But -- time will not allow us to sample them all! Making the hard decisions about which are the important volcanic features to sample so that we can relate the volcanic activity here to the AHA seismic event observed 18 months ago is very frustrating! We have to constantly ask ourselves: “What data and samples will help us the most in answering the scientific questions, or hypotheses, we are investigating?” Our answer at this study site is to concentrate our sampling in the rift valley floor. With the time we have left, we are focusing on sampling the three main volcanoes, and several smaller volcanic cones and lava flows throughout the rift valley floor.  [ send green star]
 
 September 25, 2009 7:40 AM

Tonight will be a long one for Mike Perfit, the watch standers, “Mighty Mo”, and me! But we have schools of small mahi mahi (dolphin fish), flying fish, and squid to keep us company and entertain us in the evening drizzle. We also have thoughts of dry land, loved ones, and home- where we will be in less than a week!


   

View Today's Slideshow!


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 September 27, 2009 8:44 AM

cloudy weather

TODAY'S WEATHER
Cloudy
82.4°F (28°C)
Latitude: 2 deg 10.3’N
Longitude: 97 deg 43.1’W
Wind Direction: SW
Wind Speed: 10 Knots
Sea State: 1
Swell(s) Height: 4-6 Foot
Sea Temperature: 84.9°F (29.4°C)
Barometric Pressure: 1011 MB
Visibility: 20 Nautical Miles

 [ send green star]
 
 September 29, 2009 11:17 AM

what's to eat today?
Breakfast
Creamed Tuna with Biscuits
Pineapple Pancakes
Cinnamon Rolls
Bacon & Sausage
Home Fries & Hot Cereal
Eggs to Order
Fresh Mangoes and Melon
Dry Cereal
Juices

Lunch
Cajun Meatloaf
Rissole Potatoes
Fish Soup
Salad Bar
Assorted Cookies

Dinner
Walnut Chicken
Rice & Vegetables
EggRolls & Dinner Rolls
Salad Bar
Cherry Crunch
Homemade Coffee Ice Cream


Bosun Bill Kamholtz, shown here behind the DSL-120 sonar fish, and his deck crew have been busy painting throughout the cruise so that RV Melville stays in good shape for subsequent oceanographic cruises.

 [ send green star]
 
 October 01, 2009 7:22 AM

Lots of hot air!
May 5, 2000
By Capt. Eric Buck


For most of this voyage, RV Melville has been operating in equatorial waters. Hot, sultry days are the norm, with light and variable winds, or no wind at all. During periods of calm, which can last for days or weeks, the surface of the sea becomes glassy -- almost like a mirror. The only apparent motion of the sea surface is caused by the long, low swells that have traveled thousands of miles to reach us having been generated by some distant storm. So, what's going on here? Why is there not more of a steady breeze? At other places Melville has worked, the wind blows constantly and strongly.

 [ send green star]
 
 October 03, 2009 6:43 AM

Why do we have winds at all? The main cause of all winds is the unequal heating of the Earth’s surface. A good example of how wind is created by unequal heating can be found along many coastlines. The ocean is an enormous heat sink and moderator of temperature. Land is the opposite -- it heats up fast when the sun comes up, and cools off fast when the sun goes down. At night, as the land cools off, the air over it cools off too. The cooler air sinks, hits the ground, and spreads out laterally. This means that along the coast, the wind blows offshore, or away from the coast, in the morning. By about midday, the land is really heating up, while the water has a relatively constant temperature. As the hot air rises over the land, cooler air at ground level has to rush in to fill the void left by the rising air. Along the coast, the wind reverses and now blows onshore. Fishermen have known this for centuries, and used the morning offshore breeze to carry them to the fishing grounds, and the afternoon onshore breeze to take them home.  [ send green star]
 
 October 05, 2009 2:18 PM

On a global scale, unequal heating causes a general circulation pattern and predominant winds. If you imagine the rotating Earth moving around the sun, you can see that the equatorial regions receive the greatest amount of heat from the sun, while the polar regions receive the least amount of heat. The tilt of the Earth’s axis is what causes our seasons -- but that’s another story! Because of the uneven heating of the Earth, areas of high pressure and low pressure are generated. The air flows from high to low to try to even out the pressure. This creates wind. However, it doesn’t flow in a straight line from high pressure to low pressure. The rotation of the Earth affects the apparent path of the wind (this is known as the Coriolis effect), as does the elevation of the land.  [ send green star]
 
 October 07, 2009 7:00 AM

In the equatorial regions, hot air rises and a region of low pressure is created at the surface. Because the air is rising rather than moving laterally, there is little wind. Once it gets high in the atmosphere, the air cools and spreads out to the north and south. Somewhere in the mid-latitudes (30-40 degrees), the cool air begins to sink, forming a region of high pressure at the surface. Because the air is sinking rather than moving laterally, there is little wind here too. Air flows from these latitudes (high pressure) back to the equatorial region (low pressure) at the surface. The rotation of the Earth deflects the apparent flow of air from a north to south path. In the northern hemisphere, the flow is deflected to the right, creating the northeast trade winds. In the southern hemisphere, the flow is deflected to the left, creating the southeast trades. Over the ocean, the trade winds blow with a fairly constant force (15-20 knots) and direction. Over land, the trade winds are less constant because their flow can be interrupted by localized heating and changes in relief of the land.  [ send green star]
 
 October 09, 2009 12:14 PM

Over the centuries, sailors have given peculiar names to winds and regions. The equatorial area is known as the “doldrums” because of the lack of wind. In the days of sail, ships could get stuck here for weeks waiting for a breeze to come up. That could be quite depressing -- hence the name “doldrums”. It was not uncommon for a ship to launch her boats, with sailors pulling at the oars in an attempt to tow the ship out of the area! Another odd practice was a result of sailors’ superstitions. Whistling was generally banned on board ship for fear of whistling up a storm. However, in the doldrums, it was not unusual to see the Captain standing by the aft rail and whistling gently in the hopes of raising a breeze to move his ship along!  [ send green star]
 
 October 11, 2009 8:13 AM

Above the mid-latitudes, from about 40-55 degrees latitude, the prevailing winds are westerlies in both hemispheres. In the southern ocean, these latitudes were (and still are) another area of dread for sailors -- but for the opposite reason! Look at a globe and see how much land occurs between 40-55°S. There are hardly any land masses to interrupt the flow of the westerlies, and so they can attain significant speeds -- 30-45 knots on average. Constant winds of this magnitude cause enormous seas that make life aboard ship miserable. This band of latitude is called the “Roaring Forties”.  [ send green star]
 
 October 13, 2009 10:27 AM

The relief of the land can contribute locally to a wind’s character. For example, where mountain ranges are close to a coast, a cold wind can blow down the mountains and offshore with considerable force. This is called a “fall wind”. Fall winds can endanger small craft and making things uncomfortable for larger vessels. Off the west coast of Mexico and Central America, this kind of wind is called a “tehuantepecer”. The “ampero” off Argentina and the “mistral” wind of the western Mediterranean are also examples of fall winds.



It seems as if all the nasty winds get the memorable names, but sailors have names for the gentle ones as well. A light breeze that just barely ripples the surface of the water is called a “cat's paw”.

 [ send green star]
 
 October 15, 2009 11:43 AM

Nautical Trivia: the Beaufort Scale



When we observe and report the wind, we note the direction it is coming from and the speed (expressed in knots aboard ship). When wind blows across the water, it first causes ripples to form. If the wind blows long and hard enough, these ripples build into waves. The effect of the wind on the water and the height of the waves produced, is called the sea state. Perhaps the best known scale of wind forces is that developed by Admiral Sir Francis Beaufort in 1806. Known as the Beaufort Scale, it is a series of numbers from 0 (calm) to 12 (hurricane) that indicates the strength of the wind. The scale was accepted by the British Admiralty in 1838, and the International Meteorological Committee adopted it in 1874. As originally written, the Beaufort Scale made no reference to wind speed. That was because Admiral Beaufort was a naval tactician, and his Scale was developed to assist ships’ officers in handling and maneuvering their vessels under certain conditions of wind. Hence, the Scale expressed the effect that certain amounts of wind would have on maneuvering a British Man-of-War, a ship with 40 guns. Over the years, various attempts were made to assign wind velocity ranges to the Beaufort Scale, often with conflicting results. Even though the age of sail died away, Beaufort’s numbers have survived as a common way of expressing wind strength. Today there is general agreement on the wind speeds for different Beaufort Numbers.

 [ send green star]
 
 October 17, 2009 9:19 AM


 

View Today's Slideshow!

rainy weather

TODAY'S WEATHER
Overcast and rain
77°F (25°C)
Latitude: 2 deg 10’N
Longitude: 97 deg 45’W
Wind Direction: NW
Wind Speed: 10 Knots
Sea State: 2
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29.4°C)
Barometric Pressure: 1013 MB
Visibility: 5-10 Nautical Miles  [ send green star]
 
 October 19, 2009 1:26 PM

what's to eat today?
Breakfast
Linguica and onion frittata
Banana nut bread
Omelets
Bacon and sausage
Eggs to order
Assorted tropical fruits
Dry Cereal

Lunch
Darby’s roast beef
Curly fries
Chicken noodle soup
Pork and beans
Salad bar
Homemade apricot granola bars

Dinner
Fried Catfish
Wild rice
Black bean casserole
Vegetables
Fresh dinner rolls
Salad Bar
Pete’s Birthday Cake


Uta Peckman displays one of the Galapagos Rift maps that covers 33 nautical miles. It is just about as tall as she is!  [ send green star]
 
 October 21, 2009 7:41 AM

Heading to port!
May 6, 2000
By Dr. Dan Fornari


At 1115 hours local time, we hauled up the last dredge from the eastern volcano in the Galapagos Rift valley. Our deadline to finish sampling was 1200 hours. Thanks to the great ship handling by the Bridge watches, and the expert support by the winch controllers we did all the sampling we had planned. In the last dredge we recovered two types of lava from inside the crater and at the top of the volcano. One type was glassy and younger, and the other older and blocky The blocky lava appears to be slightly magnetic. Mike Perfit thinks this rock may be have high concentrations of iron and titanium. It is called a “FeTi basalt” after the chemical symbols for those two elements. It is a rock type that forms when magmas have cooled for a long time in a magma chamber before they are erupted. The geochemical analyses of these samples that he will do back on shore will tell Mike if he is right.  [ send green star]
 
 October 23, 2009 3:40 PM

As we picked the rocks out of the dredge bag, RV Melville did a slow turn and began the four day transit to Manzanillo, Mexico. As the science team finishes up the last bit of data compilation and copying, and we pack up the vehicles and all our equipment, I thought you might be interested in a summary of all the different types of data we have collected during this expedition. As you can see from the list that follows, this expedition has been exceptionally successful and productive thanks to all the hard work by every person on board RV Melville, and the shore based support staffs at Scripps Institution of Oceanography and the Woods Hole Oceanographic Institution who helped make this expedition possible. I thank them all for their dedication, effort and good spirit during this field program.  [ send green star]
 
 October 25, 2009 7:47 AM

   

View Today's Slideshow!

rainy weather

TODAY'S WEATHER
Overcast and rain
77°F (25°C)
Latitude: 2 deg 10’N
Longitude: 97 deg 45’W
Wind Direction: NW
Wind Speed: 10 Knots
Sea State: 2
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29.4°C)
Barometric Pressure: 1013 MB
Visibility: 5-10 Nautical Miles  [ send green star]
 
 October 27, 2009 6:58 AM


Breakfast
Linguica and onion frittata
Banana nut bread
Omelets
Bacon and sausage
Eggs to order
Assorted tropical fruits
Dry Cereal

Lunch
Darby’s roast beef
Curly fries
Chicken noodle soup
Pork and beans
Salad bar
Homemade apricot granola bars

Dinner
Fried Catfish
Wild rice
Black bean casserole
Vegetables
Fresh dinner rolls
Salad Bar
Pete’s Birthday Cake

Bob “Yogi” Elder carefully slides the electronic chassis out of its pressure housing. These units are the “brains” of Argo II. Craig Elder is helping.  [ send green star]
 
 October 29, 2009 11:35 AM

The Rules of the Road
May 7, 2000
By Capt. Eric Buck

Earlier in the cruise, I wrote about navigation and shiphandling. These are relatively simple undertakings on the high seas when a vessel is by herself and has ample sea room all around. Adding traffic (other vessels) to the mix makes the navigation/shiphandling equation a little more interesting and complex! There are thousands of ships, boats and watercraft of every description upon our seas and waterways. Somehow, they must get to where they are going without bumping into each other. Unlike driving on a road or highway, there are no double-yellow lines, traffic lights, or yield signs out on the water to regulate the flow of traffic. And, just like there are rules for driving a car in traffic, so there are rules for driving a ship or boat around other vessels.  [ send green star]
 
 October 31, 2009 7:17 AM

One of the curious things about going to sea is that you can sometimes go for weeks at a time without seeing any other ships or boats. Then, suddenly, you detect another ship by radar at a range of 24 miles, and you begin tracking her (plotting her movement relative to your own). Somewhere between a range of 12 and 14 miles, you begin to see her masts poking above the horizon. At 9 miles away, you can see her hull, and it becomes clear that your courses are converging. In fact, your plot reveals that you and the other ship will be at the same place at the same time! That’s what sailors call a collision course and it needs to be avoided! What is the chance that two ships leaving different ports at different times, traveling at different speeds, and going to different destinations, will arrive at the same place at the same time in the middle of the ocean? The chance must be astronomical, but I’ve seen it happen often enough. So, how do these two ships avoid running into each other?  [ send green star]
 
 November 02, 2009 4:30 PM

Fortunately, there are navigation rules that govern how ships, boats, and watercraft interact with each other. Sailors call them the Rules of the Road. The Rules are international in scope, and cover crossing, meeting and overtaking (passing) situations to name a few. The Rules also differentiate between power driven vessels, sailing vessels, and vessels of different sizes. Check out the slide show to see what the rules are when two power-driven vessels are in sight of one another, and are either meeting head on, crossing or overtaking.  [ send green star]
 
 November 05, 2009 5:35 AM

Beyond the basic relationships described in the Rules of the road slide show, the Rules of the Road get very technical. For example, a power-driven vessel must stay out of the way of a sailing vessel, but a sailing vessel must not get in the way of a power-driven vessel that can safely navigate only within the confines of a narrow channel. A fishing vessel enjoys certain privileges when engaged in fishing; when not fishing, she must obey the same rules as any other power-driven vessel of her size. The Rules also define how ships interact in any condition of visibility, when in sight of one another, and when operating close to, but not in sight of, each other (as when operating in fog or rain).  [ send green star]
 
 November 05, 2009 6:03 PM

Besides defining who shall give way to whom, the Rules prescribe lights to be shown and whistle and bell signals to be sounded. The positioning and color of lights on a vessel are critical to discerning the type of vessel and which way it is going at night. This determines who gives way and who holds her course. In addition, by sounding whistle or bell signals, you can let other vessels in the area know what you’re doing. In spite of their complexity, the beauty of the Rules is that, when properly applied, vessels can meet and pass each other in safety without the need to guess what the other vessel might do.  [ send green star]
 
 November 08, 2009 11:51 AM

These days, most vessels carry two-way radios for communicating with each other. Using the radio to let other vessels know what you are doing or to make passing agreements with them helps us follow the Rules, and greatly improves safety on the water. This is of enormous help when all the things I have talked about -- navigation, shiphandling, and traffic -- come together on a dark, foggy night off a rocky shoreline. That is when a mariner’s knowledge and skill are put to the test.  [ send green star]
 
 November 10, 2009 8:33 AM

In closing, I have an observation and a recommendation. You need a license to drive a car, and you need a license to drive a big ship. But you don’t need a license to operate a recreational boat. Whether driven by power or sail, a boat is a vehicle just like a car or ship and can be just as dangerous. Statistics show that many boating accidents occur because the Rules of the Road were ignored. Even though recreational boats do not require a licensed operator, they must still abide by the Rules. If you and your families are recreational boaters, please operate your boat responsibly and know your obligations under the Rules of the Road. Copies of the Navigation Rules are available at most any boating supplies store or from the US Government Printing Office. Further information and boating safety courses can be obtained through your local Coast Guard Auxiliary.  [ send green star]
 
 November 11, 2009 6:49 PM

Nautical Trivia–

Throughout these essays, I have used the words vessel, ship, boat and watercraft fairly interchangeably. But did you know that each one has a specific technical definition? In nautical terms, a vessel is any object or craft that can be used for transportation upon the water. By this definition, both a log raft and a super tanker are vessels! The word boat generally refers to small craft. As a rule of thumb, sailors say a boat is any vessel that can be lifted out of the water and placed aboard a ship. These days, we use the word ship to describe any large vessel. But the original definition of ship has nothing to do with the big, power-driven vessels of today. The word ship was originally used to describe a sailing vessel that was 100% square rigged. A fine example of a ship is at the Maritime Museum in Honolulu, Hawaii. The Falls of Clyde is a four-masted tall ship that is completely square-rigged. Another beautifully restored vessel with square sails resides in Melville’s home port of San Diego. She is the Star of India and because her aftermost mast is fore-and-aft rigged, she is a bark rather than a ship.  [ send green star]
 
 November 13, 2009 3:13 PM

 

View Today's Slideshow!

overcast and cloudy weather

TODAY'S WEATHER
Overcast and cloudy
84.2°F (29°C)
Latitude: 6 deg 54’N
Longitude: 99 deg 23’W
Wind Direction: Variable
Wind Speed: <1 Knot
Sea State: 0
Swell(s) Height: 3-5 Foot
Sea Temperature: 87.8°F (31°C)
Barometric Pressure: 1011 MB
Visibility: 10-25 Nautical Miles  [ send green star]
 
 November 17, 2009 11:52 AM

what's to eat today?
Breakfast
Ham & Cheese Pastry
Cow Patties
Bran Muffins
Fresh Pineapple and Mango
Dry Cereals
Juices

Lunch
Fornari’s Pizzas (spinach/feta, pepperoni, sausage/onion, plain)
Beef and Barley Soup
Green Beans
Salad Bar

Dinner
Rib-eye Steak
Deep Fried Prawns
Baked Potatoes
Sweet Corn
Fried Onions
Salad Bar
Cherry Cream Pie

RULES OF THE ROAD
Slide Show  [ send green star]
 
 November 18, 2009 3:26 PM

Farewell from Expedition #3!
May 8, 2000
By Dr. Dan Fornari

As RV Melville cuts through the low, broad Pacific swells at 12.5 knots on a northwest course towards Manzanillo, Mexico, the scientific and technical teams on board have nearly finished packing. In fact, the computer I am using to write this last daily journal will be boxed up and put in the shipping vans tomorrow morning. Everyone on board is starting to relax after 6 weeks of nonstop activity. There is a lot of excitement and anticipation of arriving in Manzanillo on Wednesday and, for the science team and some of the crew, heading home before week’s end.  [ send green star]
 
 November 21, 2009 6:43 AM

What have we accomplished during this cruise? It has been spectacularly successful! We have mapped in detail and sampled three previously unexplored areas of the mid-ocean ridge crest where the Autonomous Hydrophone Array (AHA) had detected seismic events over the past few years. When we get back to our home institutions, we will begin many months, even years, of analyses and interpretation of the sonar and photographic data, and the rock samples. We will relate our sonar images of the seafloor to the bathymetric maps to learn about the sizes and shapes of volcanoes on the mid-ocean ridges. We will identify new lava flows from all the images that we have collected to determine which volcanoes erupted recently. We will test whether those recent eruptions are related to the seismic events detected with the hydrophones by determining the ages of the freshest lavas we have collected. Will the age of the rocks match the timing of the earthquake activity? Only time (and a lot of painstaking scientific work) will tell!  [ send green star]
 
 November 22, 2009 5:46 AM

Mike Perfit and his students will analyze the volcanic glass samples that we have collected to determine their chemical compositions. From those data, they will be able to reconstruct the history of the lavas -- how deep in the Earth they came from, whether they pooled in a magma chamber before erupting on to the seafloor, and how each lava flow is related to the others. Just like a jigsaw puzzle, this information will be fitted together with all the other data to learn about how the ocean floor is built along the mid-ocean ridge over thousands of years, as well as in episodic bursts that may last only days.  [ send green star]
 
 November 24, 2009 3:13 PM

We also discovered new sites of hydrothermal activity on the East Pacific Rise near 1° 40’N. What is the heat source driving the circulation systems? Is it a new lava flow, or a new fault that opened up a crack deeper into the Earth? Could their development be related to the three-year old seismic event detected by the hydrophones at that site? Can our data provide new insights to answer these questions?  [ send green star]
 
 November 26, 2009 7:29 AM

The Science Party of Expedition #3

For now, it is “farewell” from all of us on board the RV Melville! We have enjoyed being able to Dive and Discover with you on the East Pacific Rise and Galapagos Rift during this expedition -- thank you for participating!

Next spring, we are going to the Indian Ocean to explore for hydrothermal vents that have never been seen before! Will we be able to find vents there? Will they be different from those we have found in the Atlantic and Pacific Oceans? What will the animals that live at vents in the Indian Ocean look like? There are different types of animals on the different continents on land--is the same true in the deep ocean? Will Indian Ocean vent animals be the same as those around Atlantic Ocean or Pacific Ocean vents? Or, since the Indian Ocean is between those two oceans, will they be a mixture, or completely different? Can we learn something about how vent animals spread from ocean to ocean, and vent to vent? Join us as we use the remotely operated vehicle (ROV) Jason to get a close look at the first hydrothermal vents ever seen at the mid-ocean ridge in the Indian Ocean!  [ send green star]
 
 Saturday, 7:35 AM

Personal Footnote –


I wish to thank my colleague Dr. Susan Humphris, my Co-Principal Investigator on the Dive and Discover project, for the significant help she has provided in the content, organization and writing of the web site material for this expedition. In addition, Lori Dolby and Danielle Fino at Woods Hole Oceanographic Institution (WHOI) were Web Masters for the site, and their tireless efforts back on shore to make the site superb are greatly appreciated. Lonny Lippsett, Steve Lerner and Andy Maffei, all at WHOI, provided additional editorial support and SeaNet support and I am very grateful to them for their collaboration. Finally, I want to sincerely thank all of my Co-Principal Investigators on Expedition #3, the wonderful group of students, skilled technicians, and the officers and crew of RV Melville, for contributing greatly to the success of the science program and the Dive and Discover web site. None of this work could have been done without them.  [ send green star]
 
 Monday, 5:20 AM


   

View Today's Slideshow!

overcast and cloudy weather

TODAY'S WEATHER
Cloudy
86°F (30°C)
Latitude: 11 deg 38’N
Longitude: 101 deg 18’W
Wind Direction: NE
Wind Speed: 13 Knots
Sea State: 2
Swell(s) Height: 3-5 Foot
Sea Temperature: 84.2°F (29°C)
Barometric Pressure: 1012 MB
Visibility: 10-25 Nautical Miles  [ send green star]
 
 Wednesday, 3:39 PM

what's to eat today?
Breakfast
Ham & Cheese Omelet
Poundcake
Pancakes & Sausage
Hash Browns & Oatmeal
Eggs to Order
Peaches & Yogurt

Lunch
Cheese Burgers
French Fries
Baked Beans
Pepper Pot Soup
Peanut Butter Crispy Bars

Dinner
BBQ Chicken
O’Brien Potatoes
Mushroom & Onion Quiche
Fresh Baked French Bread
Sour Cream Chocolate Chip Cake
Homemade Cherry Nut Ice Cream

Click here to see a movie of a hydrothermal vent.  [ send green star]
 
 Friday, 4:04 PM

Indian Ocean

Mission:
Dive and Discover’s first expedition of 2001 will be a 40 day long voyage to explore for hydrothermal vents at the mid-ocean ridgeglossary item in the central Indian Ocean, one of the most remote places on Earth. Like 16th century explorers who traveled across the Indian Ocean in search of new lands and exotic spices, the scientists and crew on Expedition 4 will search for new hydrothermalglossary item vent animals and ancient bacteriaglossary item -- missing links that can help explain how the fauna living at hydrothermal vents in the Atlantic and Pacific Oceans are genetically related.
 [ send green star]
 
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