Rapid Stratospheric Temperature Spikes Over the Arctic When temperatures in the polar stratosphere suddenly climb, climate analysts instantly recognize this as one of the most critical warning signs.

A sharp, late-season flip in the jet stream is setting up a winter pattern that looks very different from the one that opened ...

Maps show projected sea surface temperature trends over 2015-2099 due to moderate-high greenhouse gas emissions. The upper map includes a model where winds can't change the ocean circulation, and the ...