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Hold On, Santa – Earth’s Poles are Moving Quickly

Hold On, Santa – Earth’s Poles are Moving Quickly

Santa Claus has always lived on shifting ground. The Earth’s geographic poles move around a bit every year depending on the distribution of mass, creating a kind of wobbling effect, which we fortunately don’t feel. Now a group of researchers at the University of Texas, Austin have noted an acceleration in the movement of the poles, and they attribute it to climate change.

Between 1982 and 2005, the North Pole moved about six centimeters every year in the direction of Labrador, Canada –unlikely to be pulled over for speeding, right? But in 2005, the pole abruptly changed direction, veering East towards Greenland and almost doubling its speed. Looking for explanations, the research team turned to a plethora of geophysical data about the region, and one observation was inescapable: at the same time the pole was speeding up, the rate of Arctic sea ice melt was increasing.

They took a closer look at information from the Gravity Recovery and Climate Experiment (GRACE) run by NASA. GRACE measures changes in the Earth’s gravity field, which also changes over time, with the potential to allow researchers to track changes in the distribution of mass. Using GRACE, they were able to follow sea ice melt, and they noted that, as predicted, when the Earth lost mass in one area, it naturally tilted slightly in that direction.

Since Greenland’s ice sheet has been retreating at a shocking rate, it’s no surprise that the geographic pole has been moving that way recently, and that the movement has sped up. Their research shows that it’s possible to doublecheck data on sea ice melt by looking at the position of the pole, creating a confirmation method. Being able to confirm data via an independent method is tremendously helpful in science, where much can ride on the outcome of studies and researchers want to make sure they have their facts right.

Furthermore, this study, the researchers posit, will help bridge a gap between GRACE and the followup mission, GRACE II, which isn’t scheduled to launch until 2020. Additionally, now that the researchers have established a baseline and refined their data, it might be possible to perform a lookback study to improve estimates of ice loss before satellite monitoring was available. That’s more good news that will make it easier to make accurate comparisons when looking at sea ice then and now.

This research is fascinating and it has important implications for future studies, showing how a symptom of climate change can in turn be used as a tool to measure specific aspects of climate change. While migrations of the geographic pole don’t have a big impact on the daily lives of most of us, the underlying cause, melting sea ice and rising sea levels, most definitely does. The researchers claim that 90% of the movement of the Earth’s poles can be attributed to climate change, illustrating yet another phenomenon hitched to this runaway environmental train.

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Photo credit: Staff Sgt. Joseph Burke and Sgt. Brandi Manuel from the 7th Sustainment Brigade, XVIII Airborne Corps reenlist at the South Pole, February 2012. US Army

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53 comments

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7:10PM PDT on May 19, 2013

interesting

2:05AM PDT on May 19, 2013

As the world turns there will be big changes.

10:48PM PDT on May 18, 2013

ty

7:16AM PDT on May 18, 2013

Thank you S. E. Smith, for Sharing this!

4:28AM PDT on May 18, 2013

There's no such thing as Santa Claus. He is a lie perpetuated by parents to explain where children get their new material possessions ( gifts) during the holidays.

2:25AM PDT on May 18, 2013

thanks for sharing

9:46PM PDT on May 17, 2013

Overpopulation.

9:10PM PDT on May 17, 2013

ty

11:56AM PDT on May 17, 2013

If one stops to think about it, it makes perfect sense; that physical change in our planet takes place with and without man's help. Unfortunately man's help seems to have a more negative effect than natural changes.

11:46AM PDT on May 17, 2013

Knowing this makes absolutely no difference. The sceptics will say "I'm not going to give up my life-style just so someone else may benefit". The tree huggers, like me, will try to change a bit more, but not enough to counter everything else. In the meantime the Governments pour carbon into the air (think how much is produced by a tank shelling a town in Syria or a fighter jet sortie in Afghanistan versus the amount I save by using the bus instead of my small car when I can). I just hope the next dominant species is actually intelligent not just clever.

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