February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 5, NUMBER 11, NOVEMBER 1992
UV contrast: Measurements show that surprisingly less ultraviolet
radiation reaches the Earth's surface in Germany than in New Zealand. The
difference is attributed to both stratospheric ozone depletion over New Zealand
and to the screening effect of elevated tropospheric ozone over Germany. (See
Seckmeyer, Nature, p. 135, Sep. 10, 1992, in Prof. Pubs./Gen.
Interest--Ozone Depletion, this GLOBAL CLIMATE CHANGE DIGEST issue--Nov.
1992; and Science News, pp. 180-181, Sep. 19.)
New ice core results: The first major findings from ice coring
conducted by a team from eight European nations, the Greenland Ice Core Project
(GRIP), are reported by Johnsen et al. in Nature (p. 311, Sep. 24, 1992;
see Prof. Pubs./General Int.--Sci., this GLOBAL CLIMATE CHANGE DIGEST issue--Nov.
1992), and further discussed by D. Peel on pp. 274-275 of that issue. The
results confirm the existence of irregular, rapid warmings of up to 7 ° C
during the last ice age, which could provide important cases for testing global
climate models. Future results are expected to show, among other things, whether
greenhouse gas concentrations have led or lagged temperature variations.
Implications of the research are also discussed in New Scientist, p. 15,
Hydroxyl radical measured: The hydroxyl radical controls the
lifetimes of many chemical species in the troposphere, including some greenhouse
gases and ozone-depleting species. "Stalking the Elusive Hydroxyl Radical"
by W.H. Brune (Science, pp. 1154-1156, May 22, 1992) discusses the
implications of a paper on p. 1187 of that issue by Mount and Eisele (see Prof.
Pub./Tropospheric OH), which reports successful measurements of OH that differ
from model predictions.
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