With respect to the polar jet stream, how does a warming global climate lead to more extreme weather?. Geography

Warming is altering the polar jet stream, adding lazy north-south meanders to its path around the planet. Why

North America was so warm last winter and Europe so cold. Meandering farther north than normal into Canada,

the jet stream brought warm air with it; dipping far south over Europe, it delivered frigid winds and snow to that

region. Because the meanders move around every year, the extreme weather may too.