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Global Climate Change Digest

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




Item #d94apr148

Atmospheric CO decrease: The trend of carbon monoxide, like that of methane and nitrous oxide, changed abruptly in 1991. (See "Recent Changes in Atmospheric Carbon Monoxide," P.C. Novelli, K.A. Masarie et al., Science, 263(5153), Mar. 18, 1994: 1587-1590).

Item #d94apr149

Ocean pump shuts down: Oceanographer Peter Wadhams, coordinator of the European Sub-Polar Ocean Program, confirmed that there has been no substantial convection to the deep ocean of the Greenland Sea for 40 years, and especially in the past 10 years. He suspects this change is probably related to global warming, but European and American oceanographers are divided on the significance of the finding. (See New Scientist, p. 4, Mar. 19; Global Environ. Change Rep., p. 5, Mar. 25.)

Item #d94apr150

Second shift for Biosphere 2: A team of six began a 10-month stay in this enclosed ecosystem in the Arizona desert. This time, outside scientists will be allowed to enter and conduct research. During the initial, two-year experiment, outside scientists criticized the privately funded project for wasting a potentially valuable scientific resource. (See Science, pp. 1368-1369, Mar. 11; Nature, p. 88, Mar. 10; New Scientist, p. 10, Mar. 19, and p. 9, Feb. 5.)

Item #d94apr151

"Pumping Iron in the Pacific," M.L. Wells, Nature, pp. 295-296, Mar. 24. Summarizes a session at the February Ocean Sciences Meeting, which discussed the results of a field test of the contentious hypothesis that fertilizing some regions of the ocean with iron would stimulate CO2 uptake. Results give some support for the theory, but further tests are planned and much is expected to be learned in the process. (See related articles on climate engineering in GCCD, Mar. 1994)

Item #d94apr152

"NASA Begins Six-Month Aircraft Ozone Study," P. Zurer, Chem. Eng. News, p. 9, Mar. 14. A campaign based in Christchurch, New Zealand, will study the causes of ozone loss in the Southern Hemisphere and assess the environmental impacts of a planned new generation of supersonic planes.

Item #d94apr153

"Global Ocean Observing System Gains Momentum," M.G. Briscoe, Eos, p. 116, Mar. 8. Summarizes U.S. and international developments in the creation of an internationally-coordinated, scientifically-based program for systematic data collection and exchange.

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