Cutting Through The Crap

Monday, January 21, 2013

Changes Up North



I make no claim fully to understand this article, but it sounds serious. And it seems to explain (far as I can tell) why global warming (note to Rick: there are times when it's the better term) can result in record cold temperatures (climate change) in some areas. Like Atlanta, Frankie.


Sudden stratospheric warming has split the polar vortex in two. The polar vortex, which forms and deepens as the atmosphere loses heat to space in the darkness of the long Arctic winter night, was split in two by massive heating from below. A series of intense storms in the far north Pacific intensified a very long wave in the lower atmosphere... 
... Major stratospheric warmings have taken place, on average, every other year over the past 50 years. The physics of these warmings is very complicated. Since 1998 these warmings have been more frequent and earlier in the winter. Previously, major warmings typically happened in February. Over the past decade they have happened in December and January, but this one is exceptional on all counts. This stratospheric warming is apparently the strongest ever observed in the first half of January according to the NOAA figure... 
...The vortex over north America has been pushing cold air over the United States.  Multiple outbreaks of Arctic air can be expected over the eastern half of the U.S. and Canada over the next ten days. A winter storm developing now over the southern Appalachians is forecast to bring snow to the DC area tomorrow afternoon. Then the storm is predicted to intensify over the north Atlantic. The amplifying energy of the southward displaced vortex over north America are forecast by the GFS model to make the storm "bomb" to a 944mb low south of Greenland. Huge waves are forecast to hit the Atlantic coast of Europe early next week.


[The image is from the linked article.]

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