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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 7, NUMBERS 11-12, NOVEMBER-DECEMBER 1994

NEWS... RESEARCH NEWS

Item #d94nov210

Revised solar index: U.S. and French researchers have assembled a new reconstruction of sunspot number over the past three centuries. Some new features of the record could have implications for climate research. (See Hoyt paper in Prof. Pubs./Gen. Interest/Science, and New Scientist, p. 21, Oct. 29.)

Item #d94nov211

Aircraft impacts: New data collected in the lower stratosphere indicate that nitrogen radicals (which would be emitted by supersonic aircraft) do not destroy ozone there as previously thought. (See Wennberg paper in Prof. Pubs./Aircraft Emissions, and Chem. Eng. News, pp. 6-7, Oct. 24.)