The world is getting warmer. It comes as no surprise, therefore, when researchers announced in September that Arctic sea ice extent is still below normal, continuing a years-long downward trend, covering less and less of the north polar seas.
On the heels of that announcement, came another, a little more puzzling. While Arctic sea ice was melting, on the other end of the world, Antarctic sea ice was at an all-time high. In 2014, sea ice surrounding Antarctica covered more of the southern oceans than it has since satellite record began in the late 1970s.
Arctic and Antarctic sea ice are both affected by climate change, but the two poles of Earth are behaving in intriguingly different ways. This new NASA video explores the curious differences between north- and south-polar sea ice.
Bottom line: A new NASA video explores the question of why, in our warming world, sea ice is decreasing in the Arctic while Antarctic sea ice is at an all-time high.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. Today, as Lead Editor at EarthSky.org, she helps present the science and nature stories and photos you enjoy. She also serves as one of the voices of EarthSky on social media platforms including Facebook, Twitter and G+. She and her husband live in Tennessee and have two grown sons.