This New York Times article explains the abnormally cold temperatures in the United States in the winter of 2009 and 2010. The article says a changing pressure pattern called the arctic oscillation is responsible. It also touches on global climate change.
New York Times Company. Feeling that Cold Wind? Here's Why. New York: New York Times Company, January 10, 2010. http://www.nytimes.com/2010/01/10/weekinreview/10chang.html (accessed 30 September 2016).
%0 Electronic Source %D January 10, 2010 %T Feeling that Cold Wind? Here's Why %I New York Times Company %V 2016 %N 30 September 2016 %8 January 10, 2010 %9 text/html %U http://www.nytimes.com/2010/01/10/weekinreview/10chang.html
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