Newswise — Global trend since Nov. 16, 1978: +0.13 C per decade
July temperatures (preliminary)
Global composite temp.: +0.05 C (about 0.09 degrees Fahrenheit) above20-year average for July.
Northern Hemisphere: +0.09 C (about 0.16 degrees Fahrenheit) above 20-yearaverage for July.
Southern Hemisphere: ±0.00 C (about 0.00 degrees Fahrenheit) above 20-yearaverage for July.
June temperatures (revised):
Global Composite: -0.11 C below 20-year average
Northern Hemisphere: +0.01 C above 20-year average
Southern Hemisphere: -0.23 C below 20-year average
(All temperature variations are based on a 20-year average (1979-1998) forthe month reported.)
Notes on data released Aug. 14, 2008:
Shrinking regions of cooler than normal temperatures in the tropical PacificOcean in July suggest the La Niña cooling event is fading, according to Dr.John Christy, director of the Earth System Science Center at The Universityof Alabama in Huntsville.
Notes:As part of an ongoing joint project between UAH, NOAA and NASA, Christy andDr. Roy Spencer, a principal research scientist in the ESSC, use datagathered by microwave sounding units on NOAA and NASA satellites to getaccurate temperature readings for almost all regions of the Earth. Thisincludes remote desert, ocean and rain forest areas for which reliableclimate data are not otherwise available. The satellite-based instrumentsmeasure the temperature of the atmosphere from the surface up to an altitudeof about eight kilometers above sea level.
Once the monthly temperature data is collected and processed, it is placedin a "public" computer file for immediate access by atmospheric scientists in the U.S. and abroad.
Neither Spencer nor Christy receives any research support or funding fromoil, coal or industrial companies or organizations, or from any private orspecial interest groups. All of their climate research funding comes fromstate and federal grants or contracts.
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