First five months of 2010 second warmest on record
Global climate trend since Nov. 16, 1978: +0.14 C per decade
May temperatures (preliminary)
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.
The chance that 2010 will set a record drops as the El Nino warming event fades and the Central Pacific Ocean cools. NOAA has issued a "watch" for a La Nina Pacific Ocean cooling event.
For the third time in the past four months a new high temperature has been set for the Arctic. Temperatures in the Arctic -- latitude 60 N (about even with Helsinki and the southern tip of Greenland) to the North Pole -- were a full two and a half degrees Celsius (about 4.5 degrees Fahrenheit) warmer than seasonal norms for that region.
May 2010 set records as the warmest May in the 32-year satellite temperature record for both the Northern Hemisphere (+0.78 C) and the northern temperate zone, also +0.78 C.
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.January through May Comparison
The satellite-based instruments measure the temperature of the atmosphere from the surface up to an altitude of about eight kilometers above sea level. Once the monthly temperature data is collected and processed, it is placed in a "public" computer file for immediate access by atmospheric scientists in the U.S. and abroad.
Neither Christy nor Spencer receives any research support or funding from oil, coal or industrial companies or organizations, or from any private or special interest groups.
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