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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 7, NUMBER 4, APRIL 1994
NEWS...
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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