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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999



Item #d93sep124

Nighttime warming: 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.)

Item #d93sep125

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.

Item #d93sep126

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 26.)

Item #d93sep127

Ecological responses: 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).

Item #d93sep128

Postdoctoral 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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