Monday, January 3, 2011

Global Climate Update

Headline: January -November 2010 Global Temperatures were warmest on record.

The global combined land and ocean surface temperature for the year-to-date through November was 0.64°C (1.15°F) above the 20th century average—the warmest such period since records began in 1880. The combined land and ocean surface temperature through November in the Northern Hemisphere was also the warmest on record, while the combined land and ocean surface temperature in the Southern Hemisphere tied with 2005 as the fifth warmest such period on record. The globally averaged land temperature was 1.02°C (1.84°F) above average, which was the warmest January–November in the period of record.

The shift from a warm phase to a cold phase ENSO during 2010 contributed to a globally averaged January–November ocean surface temperature anomaly of 0.50°C (0.90°F) above the 20th century average, tying with 2005 as the third warmest such period on record. Images of sea surface temperature conditions are available for all weeks during 2010 from the weekly SST page.

Warmer-than-average temperatures occurred during the year-to-date (January–November) for most of the world's surface. The warmest 11-month above-average temperatures occurred throughout the high latitude regions of the Northern Hemisphere, Canada, Alaska, the tropical Atlantic Ocean, the Middle East, eastern Europe, and northern Africa. Temperatures were notably cooler across the Southern oceans, most of the eastern Pacific Ocean, western Scandinavia, parts of central Russia, and parts of Australia.

According to Environment Canada, 2010 set a record as the warmest January–November period for the country, 2.9°C (5.2°F) above normal. This value surpassed the previous record set in 2006 at 2.4°C (4.3°F) above normal. In addition to the second warmest fall (September–November) period on record during 2010, Canada also experienced its warmest spring (March–May) and winter (December 2009–February 2010) and third warmest summer (June–August) on record.

Map and data information from NCDC.

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