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 9, NUMBER 1, JANUARY 1996
Methyl bromide, an ozone depleter widely used in agriculture, is destroyed
at the ground by bacterial activity, according to new research. This result
leads to a lower estimate of ozone depletion potential. (See paper by Shorter in
Ozone Depletion/Ozone Depleting Substances, this Digest issue--Jan.
1996; also Science News, p. 278, Oct. 26, 1995; New Scientist,
p. 10, Oct. 28; Chem. & Industry, p. 857, Nov. 6.)
UV projections: The paucity of suitable instruments for measuring
solar ultraviolet radiation prevents direct determination of any global trends
due to ozone depletion. A study intended to circumvent this problem by
accounting for the blocking effect of clouds is described by Lubin and Jensen.
(See Ozone Depletion/UV Measurement, this Digest issue--Jan. 1996; also
The New York Times, p. C4, Oct. 26, 1995.)
Greenland ice growth: Laser altimeter measurements show a
significant thickening of part of the Greenland ice cap over the past decade.
This is consistent with, but not necessarily a result of, increased
high-latitude precipitation from greenhouse warming. (See Krabill paper in Trend
Analysis, this Digest issue--Jan. 1996; also New Scientist, p.
18, Nov. 11, 1995.)
Comprehensive global models, with dynamic biogeochemical ecosystem
components that interact realistically with the physical climate system, were
the focus of a conference in Garmish-Partenkirchen, Germany, last September.
Presentations suggest that the ability to predict the broad characteristics of
regional climate on seasonal to interannual timescalesand any
anthropogenic contri-butioncould be realized within the next ten years.
(See Nature, p. 12, Nov. 2, 1995.)
Ocean data declassified: The U.S. Navy is starting to release a cold
war archive of oceanographic data, a move viewed as a bonanza by scientists. The
release has been championed by Vice President Al Gore and a group he set up of
about 60 scientists, called Medea (Measurements of Earth Data for Environmental
Analysis). Medea said the decades of data on ice, temperature and salinity would
greatly aid climate studies. Copies of a report on the data can be obtained from
Medea (tel: 703 883 5265; fax: 703 883 6190).
The NOAA Postdoctoral Program in Climate and Global Change
is accepting applications through March 1, 1996. Request information by phone
(303 497 8649) or e-mail (barba @ncar.ucar.edu). (See Bull. Amer. Meteor.
Soc., p. 2496, Dec. 1995)
"Polar Regions Give Cold Shoulder to Theories," D. Normile,
Science, p. 1566, Dec. 8, 1995. Climate models predict that global
warming will be evident first in the polar regions, but scientists at the recent
Wadati International Conference on Global Change and the Polar Regions
(Tsukuba, Japan) agreed that detecting climate change in a single region is a
lot trickier that was thought a few years ago.
"Global Heat Breeds Superaphids," P. Aldhous, New Scientist,
p. 17, Dec. 23-30, 1995. The insecticide-resistant peach potato aphid is already
a major agricultural pest in the U.K. Experiments at Rothamsted Experimental
Station show that a slight warming of winter temperatures could help it become
an even more serious pest.
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