5 Questions
Which of the following is the second largest contributor to polar drift, after the rebound of Earth's surface following the retreat of glaciers since the last ice age?
Irrigation
What is the estimated distance that the North Pole has been nudged by irrigation from 1993 through 2010?
78 centimeters
What causes part of the cyclical drift of the North Pole across the Arctic seascape?
Seasonal weather patterns
What is the 14-month-long oscillation that helps drive the movement of the North Pole?
Chandler wobble
According to Clark Wilson, a geophysicist at the University of Texas at Austin, what else moves the North Pole around, aside from the cyclical drift and oscillations?
Subtler factors
Test your knowledge about the impact of irrigation on Earth's rotation with this quiz. Explore the surprising findings from computer simulations and learn about the significant role irrigation plays in shifting the North Pole. Discover how this phenomenon ranks in relation to other contributors to polar drift.
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