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January-June 2010 Temperatures
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The map shows where average surface temperatures were up to 7 degrees Celsius above (red), below (blue), or near (white) the long-term average (1971-2000) for the first half of 2010. The warming influence of an El Niño event in the tropical Pacific contributed to one of the two warmest January-June periods on record. The contrast between warmth in Canada and cool conditions across the North Atlantic is the influence of a strongly negative phase of the Arctic Oscillation.

Photo Credit: 
Ned Gardiner

ghcn_2010jul-dec_lrg.png

July-December 2010 Temperatures
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The map shows difference from average temperature for July-December 2010. Temperature anomalies are more muted as the influence of the Arctic Oscillation fades across high northern latitudes. Meanwhile shades of blue in the tropical Pacific indicate the emergence of a moderate-to-strong La Niña in the second half of the year. Theheatwave in western Russia also left its mark on the July–December average temperatures.

Photo Credit: 
Ned Gardiner
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Maps of global surface temperature anomaly from January-June 2010 (top) and July-December (bottom). Based on Global Historical Climatology Network data from NCDC.

Photo Credit: 
Hunter Allen - NOAA Climate.gov