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Climate bulletin - December 2013

Temperature anomalies relative to the 1961 - 1990 average.

Summary of the world's climate in December 2013.

The global average temperature for December 2013 was 0.49 ± 0.15 °C above the 1961-1990 average (down slightly from November). Sea-surface temperatures (SSTs) in the Tropical Pacific remained close to the long-term average, but together with other indicators, conditions were still El Niño-Southern Oscillation (ENSO) neutral.

During December, the global average air temperature over land was warmer than the long-term average. The pattern of temperature anomalies in the northern hemisphere bore certain similarities to November. Northern Eurasia was much warmer than average, but cooler than average conditions were reported in southern parts of the continent. Much of the US and Canada were colder than average, but Alaska and parts of the west coast were warmer than average. South America was largely warmer than average, but the far southern tip and the Antarctic Peninsula were colder than the long-term average.

SSTs were generally warmer than average. Areas of cooler than average SSTs were recorded in the eastern Pacific, south Atlantic and Southern Oceans. Unusually high water temperatures were recorded in the north Pacific, north Atlantic and western Pacific.

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