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 10, NUMBER 3, MARCH 1997
Ocean brake on warming: Based on historical observations of sea
surface temperatures, a team of researchers have proposed that global warming by
greenhouse gases is being partly offset by fluctuations of the ocean-atmosphere
system in the tropical Pacific involving upwelling of cool water. (See Cane et
al., PROF. PUBS./OF GEN. INTEREST, this Global Climate Change Digest issue--Mar.
1997.) The theory provides an alternative explanation why climate models (which
do not account for the mechanism) predict a larger global warming response to
greenhouse gases over the past century than has been observed. Anthropogenic
aerosols have been proposed recently to explain the discrepancy, but their
radiative effects remain uncertain and under debate. The research is discussed
in New Scientist, p. 16, Feb. 22, 1997.
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