The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles. It ALWAYS exists near the poles, but weakens in summer and strengthens in winter. The term "vortex" refers to the counter-clockwise flow of air that helps keep the colder air near the Poles. Many times during winter in the northern hemisphere, the polar vortex will expand, sending cold air southward with the jet stream (see graphic above). This occurs fairly regularly during wintertime and is often associated with large outbreaks of Arctic air in the United States. The one that occurred January 2014 is similar to many other cold outbreaks that have occurred in the past, including several notable colder outbreaks in 1977, 1982, 1985 and 1989.
Full story at http://bit.ly/2wlA6eZ
Source: http://www.nws.noaa.gov
Donation:
If you appreciate the things I share, consider making a contribution
no matter how small via PayPal or with TransferWise (EUR).
If you use Waves my wallet address is: 3PPeCnXEDAiRVzvsuGRycrNDHhWgDq68uVt
If you use Bitcoin my wallet address is: 12pAsyMdZoTHPvkiRAZiuQhC8bF4DLbYpQ
Bitcoin QR-Code
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.