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Jet stream

The Polar jet stream carries weather systems around the northern hemisphere. It's powered by the temperature differential between the Arctic and areas farther south, but new research finds that it's being disrupted as rapid warming in the Arctic reduces t

Here’s a new climate change reality that Trump’s new policies ignore

Global Politics

As President Trump turns US government policy away from the realities of climate change, a new scientific study confirms a link between climate pollution and dangerously extreme weather. The irony of the timing is not lost on the study’s lead author.

Strange weather and climate change

Environment
The polar jet stream carries weather around the Northern Hemisphere. Climate researcher Jenifer Francis believes the rapidly warming Arctic is slowing and warping the jet stream, allowing Arctic air to spill farther south in some places.

How the warming Arctic might be behind Boston’s deep freeze

Science
A man is silhouetted against condensation rising off of Lake Michigan in Chicago on January 6, 2014. Chicago was experiencing historic cold this week.

Could the polar vortex have something to do with global warming?

Environment
The European Space Agency’s Earth Explorer CryoSat makes precise measurements of changes in the thickness of marine ice floating in the polar oceans, as well as variations in the thickness of the ice sheets of Greenland and Antarctica.

On a long downward slide, scientists say 2013 was an up year for Arctic Ice

Environment

Scientists find waste heat affects climate in winter

Environment

In a recent study, climate scientists learned that the amount of waste heat large global cities produce influences regional climates. Now, scientists are using the study to explain how the planet is warming.

In Sandy’s wake, Scientists Explore Links Between Warming Arctic and Extreme Weather

Environment

Months before both this year’s record Arctic ice melt and Hurricane Sandy, a climatologist identified changing weather patterns that suggest links between the two seemingly separate events. Sam Eaton reports from New Jersey. In the first of two special reports for The World and the PBS program NOVA, Sam Eaton reports from New Jersey.