Saildrones redeployed
August 22, 2019

Despite a run-in with an iceberg and the world’s worst sailing conditions, Saildrone 1020 successfully completed its 13,670-nautical-mile journey around Antarctica, and indicated that parts of the Southern Ocean emit carbon dioxide in winter.

Aerial photo of sea ice in Antarctica's Amundsen Sea
March 26, 2021

The most recent maximum (September 2020) was above the long-term average, and the most recent minimum (February 2021) was below the long-term average, but neither set a record. Antarctic sea ice has greater year-to-year variability than the Arctic, and little evidence of long-term change.

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.

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