As globe warms, atmosphere may shrink
The height of the upper atmosphere has dropped over the last 40 years, possibly because of greenhouse warming.
Jarvis, M.J., B. Jenkins, and G.A. Rodgers. 1998. Southern hemisphere observations of a long-term decrease in F region altitude and thermospheric wind providing possible evidence for global thermospheric cooling. Journal of Geophysical Research 103(Sept. 1):20,774.
Ulich, T., and E. Turunen. 1997. Evidence for long-term cooling of the upper atmosphere in ionosonde data. Geophysical Research Letters 24(May 1):1103.
Upadhyay, H.O., and K.K. Mahajan. 1998. Atmospheric greenhouse effect and ionospheric trends. Geophysical Research Letters 25(Sept. 1):3375.
Guy P. Brasseur
National Center for Atmospheric Research
Atmospheric Chemistry Division
P.O. Box 3000
Boulder, CO 80307-3000
Martin J. Jarvis
British Antarctic Survey
Natural Environment Research Council
High Cross, Madingley Road
Cambridge CB3 0ET
From Science News, Vol. 154, No. 13, September 26,
1998, p. 199.
Copyright ” 1998 by Science Service.
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