Land temperatures, December 2010

Land temperatures, December 2010

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Credit: NASA/SCIENCE PHOTO LIBRARY

Caption: Land temperatures. Map showing northern hemisphere land surface temperatures in December 2010 compared to the average temperature for the same period between 2002 and 2009. Blue areas are cooler than average and red areas are warmer than average. While north Europe and most of eastern North America were colder than average, Greenland and parts of Canada were exceptionally warm. This was caused by a negative Arctic Oscillation, which arises when the two opposing pressure systems over the Arctic (low pressure) and mid-latitudes (high pressure) are weak. Cold air from the Arctic moved south causing heavy snow fall, while some warm air seeped north. Image obtained by the Moderate Resolution Imaging Spectrometer (MODIS) on NASA's Aqua satellite.

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Keywords: 21st century, aqua, arctic, arctic oscillation, asia, asian, atmospheric pressure pattern, climate science, cold, cold episode southern oscillation, continent, december 2010, deviation from average, earth observation, europe, european, extreme weather, la nina, land temperature, map, meteorological, meteorology, moderate resolution imaging spectrometer, modis, negative oscillation, negative phase, north america, north american, northern hemisphere, satellite, satellite image, temperatures, weather, winter

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