February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 6, NUMBER 9, SEPTEMBER 1993
A new analysis of temperature trends examines the likely connection between
rising nighttime temperatures and the rise of greenhouse gases. Current climate
models may be missing important factors controlling climate, such as
anthropogenic effects on cloudiness. (See: "Nighttime Warming and the
Greenhouse Effect," G. Kukla, T.R. Karl, Environ. Sci. Technol.,
27(8), 1468-1474, Aug. 1993.)
A long-term greenhouse
warming simulation 500 years into the future shows that the ocean could
enter a new, stable state in which the present thermohaline "conveyor belt"
circulation ceases. See papers in this issue's section on Prof. Pub./Climate
Projections, and "Tales of the Coming Mega-Greenhouse,"
Science, p. 553, July 30 1993.
Elevated UV-B has
been observed for the first time in a populated region, the southern tip of
Argentina. (See: "Solar Ultraviolet Irradiance Observed from Southern
Argentina: September 1990 to March 1991," J.E. Frederick, P.F. Soulen et
al., J. Geophys. Res., 98(D5), 8891-8897, May 20, 1993.)
Researchers suspect the increase reflects the influence of ozone-poor blobs of
air from the Antarctic ozone hole. A feature article in Chem. Eng. News
discusses that research, but focuses on plans to set up the monitoring networks
in North America necessary to detect any trends in UV-B radiation. (See "Researchers
Lack Data on Trends in UV Radiation at Earth's Surface," pp. 35-37, July
The U.S. EPA seeks recent analyses of species/ecosystem responses to climate
change in support of IPCC activities. Contact Dexter Hinckley, Clim. Change Div.
(PM-221), U.S. EPA, Washington DC 20460 (tel: 202-260-5874; fax: 202-260-0174).
fellowships in the earth and ocean sciences are offered by Lamont-Doherty
Earth Observatory of Columbia University (Palisades NY 10964; 914-365-8546).
Application deadline is Jan. 15.
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Index of Abbreviations