Global Highlights:
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Contents of this Section: |
The data presented in this report are preliminary. Ranks and anomalies may change as more complete data are received and processed. The most current data may be accessed via the Global Surface Temperature Anomalies page. |
IntroductionTemperature anomalies for June-August and August 2005 are shown on the four maps below. The dot maps on the left provide a spatial representation of anomalies calculated from the Global Historical Climatology Network (GHCN) data set of land surface stations using a 1961-1990 base period. The maps on the right are a blended product of a merged land air and sea surface temperature anomaly analysis which is based on data from the Global Historical Climatology Network (GHCN) of land temperatures and the Comprehensive Ocean-Atmosphere Data Set (COADS) of SST data. Temperature anomalies with repsect to 1961-1990 are analyzed separately and then merged to form the global analysis. Additional information on this product is available.During the boreal summer, above average temperatures occurred over Alaska, Canada, India, China, the majority of the U.S., the western South American coastline and Australia. There were no notable cool anomalies during June-August 2005. Much warmer than average SSTs occurred over the Northern Pacific and the Tropical Atlantic. Cooler than average conditions were observed off the coasts of Ecuador, Peru and the Gulf of Guinea. |
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During August, there
were above average temperatures over Alaska, Scandinavia, the
Middle East, Mongolia, the eastern half of North America and the
U.S. Pacific Northwest. Cooler than average temperatures were
observed over parts of Mexico, east-central Siberia and the U.S.
Great Plains. Much warmer than average SSTs occurred over the Northern Pacific and the Northern Atlantic. Cooler than average conditions were observed in the Southern Pacific and Southern Atlantic. |
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The mean position of upper level ridges of high pressure and troughs of low pressure (depicted by positive and negative 500 millibar height anomalies on the August 2005 map and the June-August 2005 maps) are generally reflected by areas of positive and negative temperature anomalies at the surface, respectively. For other Global products see the Climate Monitoring Global Products page. |
Images of sea surface temperature conditions are available for all weeks during 2005 at the weekly SST page |
Temperature Rankings and Graphics |
Current Month / Seasonal / Year-to-date |
August | Anomaly | Rank | Warmest Year on Record |
---|---|---|---|
Global Land Ocean Land and Ocean |
+0.77°C (+1.39°F) +0.49°C (+0.88°F) +0.57°C (+1.03°F) |
4th warmest 2nd warmest 3rd warmest |
1998 (+0.96°C/1.73°F) 1998 (+0.50°C/0.90°F) 1998 (+0.64°C/1.15°F) |
Northern Hemisphere Land Ocean Land and Ocean |
+0.86°C (+1.55°F) +0.64°C (+1.15°F) +0.73°C (+1.31°F) |
4th warmest warmest 3rd warmest |
2003 (+1.07°C/1.93°F) 2nd - 2003 (+0.61°C/1.10°F) 2003 (+0.79°C/1.42°F) |
Southern Hemisphere Land Ocean Land and Ocean |
+0.51°C (+0.92°F) +0.37°C (+0.67°F) +0.40°C (+0.72°F) |
11th warmest 6th warmest 4th warmest |
1884 (+1.42°C/2.56°F) 1998 (+0.42°C/0.76°F) 1998 (+0.47°C/0.85°F) |
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June-August | Anomaly | Rank | Warmest Year on Record |
---|---|---|---|
Global Land Ocean Land and Ocean |
+0.95°C (+1.71°F) +0.45°C (+0.81°F) +0.60°C (+1.08°F) |
2nd warmest 2nd warmest 2nd warmest |
1998 (+0.96°C/1.73°F) 1998 (+0.49°C/0.88°F) 1998 (+0.64°C/1.15°F) |
Northern Hemisphere Land Ocean Land and Ocean |
+1.00°C (+1.80°F) +0.58°C (+1.04°F) +0.75°C (+1.35°F) |
warmest warmest warmest |
2nd - 1998 (+0.99°C/1.78°F) 2nd - 1998 (+0.55°C/0.99°F) 2nd - 1998 (+0.73°C/1.31°F) |
Southern Hemisphere Land Ocean Land and Ocean |
+0.73°C (+1.31°F) +0.35°C (+0.63°F) +0.42°C (+0.76°F) |
2nd warmest 7th warmest 3rd warmest |
1998 (+0.81°C/1.46°F) 1998 (+0.46°C/0.83°F) 1998 (+0.52°C/0.94°F) |
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January-August | Anomaly | Rank | Warmest Year on Record |
---|---|---|---|
Global Land Ocean Land and Ocean |
+0.94°C (+1.70°F) +0.44°C (+0.80°F) +0.59°C (+1.06°F) |
3rd warmest 2nd warmest 3rd warmest |
2002 (+1.08°C/1.94°F) 1998 (+0.51°C/0.92°F) 1998 (+0.68°C/1.22°F) |
Northern Hemisphere Land Ocean Land and Ocean |
+0.94°C (+1.70°F) +0.51°C (+0.92°F) +0.68°C (+1.22°F) |
3rd warmest 2nd warmest 3rd warmest |
2002 (+1.20°C/2.16°F) 1998 (+0.52°C/0.94°F) 1998 (+0.77°C/1.39°F) |
Southern Hemisphere Land Ocean Land and Ocean |
+0.80°C (+1.44°F) +0.40°C (+0.72°F) +0.47°C (+0.85°F) |
2nd warmest 4th warmest 3rd warmest |
1998 (+0.86°C/1.55°F) 1998 (+0.51°C/0.92°F) 1998 (+0.58°C/1.04°F) |
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The most current data may be accessed via the Global Surface Temperature Anomalies page.
PrecipitationThe maps below represent anomaly values based on the GHCN data set of land surface stations using a base period of 1961-1990. During the 2005 boreal summer, above average precipitation fell over the southeastern U.S., the U.S. northern Great Plains, the western coast of Canada, southeast Asia, eastern Europe, much of Russia and the majority of Australia. Below average precipitation was observed in France, Spain, South Africa, most of India, along the U.S. western Gulf Coast and Great Lakes.During August 2005, above average precipitation fell over central America, eastern China, most of eastern Europe, the U.S. middle Mississippi and Ohio Valleys and parts of the Carribean. While below average precipitation was observed in Venezuela, India, Thailand, South Africa, the southeastern coast of Australia, the northeastern U.S., southern portions of Brazil and western Europe. Heavy rain led to flooding in several regions of the world, including Bulgaria, Romania, Hungary, Sudan and Ethiopia. Information on these events are available in the August Global Hazards report. |
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ENSO SST AnalysisClick here for animated loop |
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ReferencesPeterson, T.C. and R.S. Vose, 1997: An Overview of the Global Historical Climatology Network Database. Bull. Amer. Meteorol. Soc., 78, 2837-2849. |