Cause snow and abnormally cold weather in December 2009 and early January 2010 meteorologists tend to believe the negative phase of the Arctic oscillation (AO). It is a periodic strengthening or weakening of the low and high atmospheric pressure in the Arctic and mid-latitudes. One of the consequences of the negative phase of the AC is cold and snowy weather in Eurasia and North America during the winter months. The index value AK in December, according to the American meteorologists, was the lowest in the last 60 years.
Global warming, El niño, testing seismic climaticchange, and now the Arctic oscillation… What else will come up with these \»British scientists\»?