Aerial photo of sea ice in Antarctica's Amundsen Sea
May 2, 2019

Differences in geography drive differences between Arctic and Antarctic sea ice. Antarctic sea ice shows a less clear long-term trend, and much greater variability.

Global sea ice thumbnail
March 5, 2019

NASA ice expert Claire Parkinson confirms that global sea ice coverage has continued its overall downward trend since her original analysis was published in 2015.

July 12, 2014

Observing temperature patterns in the lower stratosphere gives scientists clues about our planet’s changing climate. Global average temperatures in the lower stratosphere for 2013 were slightly below the 1981–2010 average.  

Like a prehistoric fly trapped in amber during dinosaurs' days, airborne relics of Earth's earlier climate can end up trapped in glacial ice for eons. How do climate scientists turn those tiny relics into a story about Earth's ancient climate?

January 22, 2014

Among the questions triggered by the entrapment of a Russian ship near Antarctica on Christmas Eve were whether the ice conditions were out of the ordinary, and, if so, whether long-term climate change was playing a role.

July 10, 2011

In the Arctic, an ocean is surrounded by continents, while Antarctica is continent surrounded by oceans. These differences in the arrangement of land and water contribute to differences in each polar region’s climate, oceanic and atmospheric circulation patterns, and seasonal and long-term sea ice patterns.

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