The mechanism involves atmospheric waves that bounce between the upper atmosphere and ground level, amplifying weather ...

While global temperatures are rising, climate change is paradoxically causing harsher and colder winters in many regions.

The polar vortex is area of fast-moving winds well above the Earth’s surface and the jet stream that circle the Arctic during the Northern Hemisphere’s coldest months.

WASHINGTON (AP) — The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic Greenland seem like a toasty vacation spot in comparison. Even Mars has ...