Related: (video) Extreme Cold in USA, Melting Arctic — Manmade jet stream manipulation?
From: Arctic News
MONDAY, FEBRUARY 16, 2015
Our climate has changed, as illustrated by the image below.
The left map shows temperatures of 40 degrees below zero moving down into North America from the Arctic, while temperatures in much of Alaska are above freezing point. The right map shows temperature anomalies over large parts of North America at both the top end (red) and the bottom end (purple) of the scale. Temperature anomaly forecasts for the week from Feb 19 to 26, 2015, feature in the video below.
What causes our climate to change? The image below shows that the jet stream, which once used to move over North America horizontally, has become more wavy, pushing warm air north on the left, while drawing cold air from the Arctic south on the right.