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. Co