Global climate trend since Nov. 16, 1978: +0.12 C per decade
June temperatures (preliminary)
Global composite temp.: ±0.00 C (about 0.00 degrees Fahrenheit) above/below 20-year average for April.
Northern Hemisphere: +0.03 C (about 0.05 degrees Fahrenheit) above 20-year average for June.
Southern Hemisphere: -0.03 C (about 0.05 degrees Fahrenheit) below 20-year average for June.
May temperatures (revised):
Global Composite: +0.05 C above 20-year average
Northern Hemisphere: +0.05 C above 20-year average
Southern Hemisphere: +0.04 C above 20-year average
(All temperature variations are based on a 20-year average (1979-1998) for the month reported.)
As part of an ongoing joint project between The University of Alabama in Huntsville, NOAA and NASA, Dr. John Christy, director of UAHuntsville's Earth System Science Center, and Dr. Roy Spencer, a principal research scientist in the ESSC, use data gathered by microwave sounding units on NOAA and NASA satellites to get accurate temperature readings for almost all regions of the Earth. This includes remote desert, ocean and rain forest areas for which reliable climate data are not otherwise available.
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 Spencer nor Christy receives any research support or funding from oil, coal or industrial companies or organizations, or from any private or special interest groups. All of their climate research funding comes from state and federal grants or contracts.For Additional Information:
Dr. John Christy | Newswise Science News
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