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 2, NUMBER 9, SEPTEMBER 1989
RESEARCH NEWS NOTES
"Ozone Hole Surprises the Scientists Yet Again," New
Scientist, p. 28, July 29, 1989. Satellite measurements made by NASA
revealed a much weaker ozone hole in the Antarctic spring of 1988 than observed
in the previous year. High-altitude wind fluctuations played a role in the 1988
event, which does not contradict the present understanding of the role of CFCs
in ozone depletion. (See two related papers in PROF. PUBS./OF GEN. INTEREST,
this Global Climate Change Digest issue--Sep. 1989.)
"Depletion on Volcanic Aerosols," R.L. Jones, Nature,
pp. 269-270, July 27, 1989. Discusses implications of a paper by Hofmann and
Solomon which argues that the El Chichon eruption of 1982 caused a 15 percent
local ozone depletion through heterogeneous reactions on sulfuric acid
particles. (See Global Climate Change Digest, PROF. PUBS./ATMOSPHERIC
CHEMISTRY, June 1989.)
"Ancient Ice Reveals Sudden Shift in Climate," R.
Monastersky, Sci. News, p. 374, June 17, 1989; "Ice-Age Clues for a
Warmer World," D. Peel, Nature, pp. 508-509, June 15. Analysis of
Greenland ice cap cores shows that the North Atlantic region took less than 20
years to shift from glacial conditions to warmer ones at the end of the last
(Younger Dryas) ice age. Such rapid transition may be related to switching
between different modes of deep water circulation, with possible implications
for greenhouse warming. (See Dansgaard et al. article in PROF. PUBS./OF GEN.
INTEREST, this Global Climate Change Digest issue--Sep. 1989, and "Human
Activity May 'Flip' Climate from One Stable State to Another," New
Scientist, p. 42, June 24, 1989.)
"Volcanoes Can Muddle the Greenhouse," R.A. Kerr, Science,
pp. 127-128, July 14, 1989; "Questioning the Cooling Effects of Volcanoes,"
F. Flam, Science News, p. 359, June 10. Recent work indicates that the
largest volcanic eruptions can temporarily lower global temperatures for two or
three years, confusing any efforts to detect greenhouse warming. (See Mass and
Portman article in PROF. PUBS./OF GEN. INTEREST, this Global Climate Change
Digest issue--Sep. 1989.)
"Rising Seas May Herald Global Warming," ibid., p.
367. University of Toronto scientists have used computer calculations to remove
from sea level records the effect of glacial rebound (the very slow rising of
land after the retreat of ice age glaciers). They find that sea levels are
rising at a fairly uniform rate of 2.4 millimeters a year, possibly an
indication of global warming. (See paper by Peltier and Tushingham in PROF.
PUBS./SEA LEVEL, this Global Climate Change Digest issue--Sep. 1989.)
"Pollution Measures May Worsen Greenhouse Effect," New
Scientist, p. 32, June 10, 1989. Researchers at the University of East
Anglia conclude that increased cloud cover resulting from sulfate particles
might have offset half of the greenhouse heating of the global climate in the
20th century. (See Wigley paper, Global Climate Change Digest, PROF.
PUBS./GEN. INTEREST, Aug. 1989)
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Index of Abbreviations