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Global Climate Change DigestArchives of the
Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999



Item #d95jun121

U.S. climate trends: An extensive analysis of U.S. weather records by Thomas Karl et al., published in the first issue of Consequences, finds trends in weather extremes that are consistent with those expected from greenhouse warming. (See NEWS/NEW PUBLICATIONS, and PROF. PUBS./GEN. INTEREST/GENERAL AND POLICY, both in this Digest issue--June 1995.) They stress however that the analysis only relates to a limited area of the world, and results, while highly suggestive, do not constitute proof of greenhouse warming. (See Science, pp. 363-364, Apr. 21; The New York Times, p. C4, May 23.)

Aerosol cooling: A different study by Karl et al. has revealed evidence of aerosol cooling in global temperature records, which is strongest in areas where aerosol pollution is heaviest. (See Science, p. 802, May 12.)

Item #d95jun122

"Drying Out the Tropics," D. Rind, New Scientist, pp. 36-40, May 6. A climatologist gives a detailed summary of recent evidence suggesting that, contrary to conventional wisdom, global warming could substantially affect the tropical climate. It is vital to track tropical temperatures and watch how they change.

Item #d95jun123

"Will Plants Profit from High CO2?" E. Culotta, Science, 654-656, May 5. Summarizes recent experiments, which indicate that elevated CO2 may help crops grow better, but the overall effect on plants in natural ecosystems remains unknown. Elevated CO2 will alter the growth of green plants whether or not it warms the globe.

Item #d95jun124

"NASA, Academy to Re-examine EOS," A. Lawler, Science, p. 360, Apr. 21. As part of the current political trend to cut government spending by Republicans, Representative Robert Walker, chair of the House Science Committee, has called for review of NASA's massive Earth Observation System, which currently plans to launch a fleet of satellites in 1998. Walker would like to see a trimmed program, although he does acknowledge the scientific value of the project.

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