The easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

An unexpected consequence of climate change known ... located in the lower stratosphere. The most intense ozone destruction occurs in "polar stratospheric clouds that form over low-temperature ...

Scientists have long debated the role of clouds in climate change, with some arguing that they would make temperatures warmer while others arguing they might help cool the atmosphere. This is ...

and we don't know if this could impact the climate. One risk is that these new particles could seed polar stratospheric clouds, which are spectacular rainbow-colored clouds that can damage the ...

The polar dance ... Polar Vortex Blog at Climate.gov, and it’s not the only weather pattern to blame for blasts of cold air. "Weather can happen regardless of what the stratosphere is doing ...

Scientists have quantified how much climate change has driven the population decline of polar bears living in Canada's Hudson Bay.

The multi-colored clouds are known as polar stratospheric clouds (PSCs) and look similar to auroras blazing in the sky. However, these rainbow clouds aren’t auroras as you might think.

Is this stream of cold air "a polar vortex?" Not in the truest sense of the word, scientists say. This week the actual polar vortex, which lives in the stratosphere, may be helping to steer the ...