The latest global temperature trends from satellite data are reported that can be seen in this article via average world temperatures graph and by which you can see the effects of global warning.
- In the above graph the first five months of 2010 are second warmest on record.
- Worldwide climate tendency since November 16, 1978: +0.14 C per decade.
- May temperatures (preliminary).
- Worldwide compound temperature: +0.53 C (about 0.95 degrees Fahrenheit) above 20-year average for May.
- Northern Hemisphere: +0.78 C (about 1.40 degrees Fahrenheit) above 20-year average for May.
- Southern Hemisphere: +0.29 C (about 0.52 degrees Fahrenheit) above 20-year average for April.
- Tropics: +0.71 C (about 1.28 degrees Fahrenheit) above 20-year average for May.
Contrary to some reports, the satellite measurements are not calibrated in any way with the global surface-based thermometer record of temperature. They instead use their own on-board precision redundant platinum resistance thermometers calibrated to a laboratory reference standard before launch.
In the race to become the warmest year in the satellite temperature record, 2010 is running a close second to 1998. 1998 still leads with the daily average for 1 Jan to 30 June being +0.64 C in 1998 compared with +0.56 C for 2010.Through the first 151 days of the year (Jan. 1 through May 31), 2010 has averaged 0.59 C warmer than season norms. Global average temperatures through the first five months of 1998 were 0.65 C warmer than normal.
It is the third time in the past four months a new high temperature has been set for the Arctic. May 2010 set records as the warmest May in the 32-year satellite temperature record for both the Northern Hemisphere and the northern temperate zone. Compared to the other 31 Mays in the record, May 2010 was the second warmest May globally (+0.53 C), and in the tropics (+0.81 C); fourth warmest May in the Southern Hemisphere (+0.29 C); and seventh coolest May in both the Southern Polar region (-0.86 C) and the continental U.S., where the average temperature was 0.47 C cooler than seasonal norms.
Global warming effects on Average world temperatures graph:
- Decrease in the length of river and lake.
- Snow cover has decreased in many Northern Hemisphere regions.
- Melting of the Greenland Ice Sheet has recently become apparent.
- The oceans are warming.
- Sea ice thickness and extent have decreased in the Arctic in all seasons.
- Sea level is rising due to thermal expansion of the oceans and melting of land ice.
- Glaciers are melting.
