Friday, September 16, 2011

Summer 2011 Global Climate Update

"Summer 2011, 3rd Warmest on Record for Global Land Surfaces"

For the June–August three month period (Northern Hemisphere summer / Southern Hemisphere winter), this was the third warmest global land surface temperature on record. This was also the 19th consecutive June–August with the average global land temperature above the 20th century average. The 2011 Northern Hemisphere summer was the second warmest on record, behind 2010, while the Southern Hemisphere winter was the eighth warmest on record. Across the globe, warmer-than-average conditions were observed across Mexico, the eastern two-thirds of the United States and Canada, and most of Europe and Asia. Cooler-than-average regions included Alaska, Chile, Argentina, Uruguay, part of western Russia, northern Kazakhstan, and northern Australia.

In northern Europe, Finland had its fourth warmest summer since records began in the early 1900s with temperatures 2.62°C (6.52°F) above the 1971–2000 average, according to the Finnish Meteorological Institute.

The June–August 2011 global ocean temperature ranked as the 12th warmest in the 132-year period of record as ENSO-neutral conditions held during June and July before returning to La Niña in August. The warmth was most pronounced across the north central, northwest, and south central Pacific, the equatorial north Atlantic, and the Labrador Sea.

Combined, the June–August global land and ocean temperature was the seventh warmest such period on record and the 35th consecutive June–August (since 1976) with the average temperature above the long-term average. Separately, it was the 26th consecutive above-average Northern Hemisphere summer and 43rd consecutive above-average Southern Hemisphere winter.

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