Global Highlights:
|
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 July 2006 are shown on the two maps below. The dot map on the left provides 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 map on the right is a product of a merged land surface and sea surface temperature anomaly analysis which is based on data from the GHCN of land temperatures and the Comprehensive Ocean-Atmosphere Data Set (COADS) of Sea-Surface Temperature (SST) data. Temperature anomalies with respect to the 1961-1990 mean for land and ocean are analyzed separately and then merged to form the global analysis. Additional information on this product is available. |
During July, there
were above average temperatures across the United States, Brazil,
Chile, Europe, Siberia and parts of China. Cooler than average
temperatures were observed primarily in far western Russia. During January-July 2006, there were above average temperatures in the majority of North America, China and western Europe. Cooler than average temperatures were observed in Alaska, far eastern Europe, parts of Russia and western Australia. In January-July and July, warmer than average SSTs occurred in the South Pacific and the North Atlantic. In January-July, cooler than average conditions were observed in the Niño 3.4 region, and the western coast of Australia. In July, cooler than average conditions were observed in the North Pacific and South Atlantic. Please see the latest ENSO discussion for further information. |
larger image |
larger image |
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 July, 2006 map) 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 2006 at the weekly SST page. |
Temperature Rankings and Graphics |
Effective with the January, 2006 report, NCDC transitioned from the use of the Operational Global Surface Temperature Index (Quayle et al. 1999) to the blended land and ocean dataset developed by Smith and Reynolds (2005). The differences between the two methods are discussed in Smith et al. 2005. |
Current Month / Year-to-date |
July | Anomaly | Rank | Warmest Year on Record |
---|---|---|---|
GlobalLandOcean Land and Ocean |
+0.88°C (+1.58°F) +0.45°C (+0.81°F) +0.56°C (+1.01°F) |
3rd warmest 6th warmest 3rd warmest |
1998 (+0.98°C/1.76°F) 1998 (+0.55°C/0.99°F) 1998 (+0.67°C/1.21°F) |
Northern HemisphereLandOcean Land and Ocean |
+0.82°C (+1.48°F) +0.53°C (+0.95°F) +0.64°C (+1.15°F) |
4th warmest 5th warmest 3rd warmest |
1998 (+1.01°C/1.82°F) 2005 (+0.64°C/1.15°F) 2005 (+0.76°C/1.37°F) |
Southern HemisphereLandOcean Land and Ocean |
+1.06°C (+1.91°F) +0.38°C (+0.68°F) +0.48°C (+0.86°F) |
warmest 8th warmest 2nd warmest |
2nd - 1984 (+0.97°C/1.75°F) 1998 (+0.57°C/1.03°F) 1998 (+0.62°C/1.12°F) |
larger image |
larger image |
January-July | Anomaly | Rank | Warmest Year on Record |
---|---|---|---|
GlobalLandOcean Land and Ocean |
+0.75°C (+1.35°F) +0.42°C (+0.76°F) +0.51°C (+0.92°F) |
5th warmest 6th warmest 6th warmest |
2002 (+1.05°C/1.89°F) 1998 (+0.53°C/0.95°F) 1998 (+0.65°C/1.17°F) |
Northern HemisphereLandOcean Land and Ocean |
+0.84°C (+1.51°F) +0.41°C (+0.74°F) +0.57°C (+1.03°F) |
5th warmest 6th warmest 5th warmest |
2002 (+1.21°C/2.18°F) 2005 (+0.53°C/0.95°F) 2002 (+0.72°C/1.30°F) |
Southern HemisphereLandOcean Land and Ocean |
+0.47°C (+0.85°F) +0.43°C (+0.77°F) +0.44°C (+0.79°F) |
8th warmest 5th warmest 5th warmest |
2005 (+0.91°C/1.64°F) 1998 (+0.56°C/1.01°F) 1998 (+0.60°C/1.08°F) |
larger image |
larger image |
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 July, above average precipitation fell over areas that include Argentina, Chile, India, the majority of Southeast Asia, and in the U.S., the Great Lakes, Gulf Coast and Southwest regions. Heavy rain and flooding occurred in India, Turkey, Chile and across the Korean Peninsula. Below average precipitation was observed in areas including the U.S. Northern Plains, most of Brazil, southern India and much of Europe. Additional details on flooding and drought can also be found on the July Global Hazards page. |
larger image |
larger image |
ENSO SST AnalysisClick here for animated loop |
|
ReferencesPeterson, T.C. and R.S. Vose, 1997: An Overview of the Global Historical Climatology Network Database. Bull. Amer. Meteorol. Soc., 78, 2837-2849.Quayle, R. G., T. C. Peterson, A. N. Basist, and C. S. Godfrey, 1999: An operational near-real-time global temperature index. Geophys. Res. Lett., 26, 333-335. Smith, T. M., and R. W. Reynolds (2005), A global merged land air and sea surface temperature reconstruction based on historical observations (1880-1997), J. Clim., 18, 2021-2036. |