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Global Climate Change Digest

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Item #d97aug73

Temperature range revisited: An expanded study confirms a global trend toward a decrease in the daily temperature range over the past few decades, and that urban growth around meteorological stations is not affecting the result. (See Easterling paper, Prof. Pubs./Gen. Interest & Policy, this Global Climate Change Digest issue--August 1997; and Science News, p. 38, July 19.)

Item #d97aug74

Staving off an ice age may be necessary because the Aswan dam on the Nile River is limiting freshwater input to the Mediterranean, a situation which could worsen with global warming. The originator of this idea proposes a dam across the Strait of Gibralter that will prevent increasingly saline water from entering the Atlantic Ocean and stop the modification of ocean currents that could trigger the ice age. See New Scientist, p. 10, July 26, 1997, and Johnson article in Prof. Pubs./Gen. Interest & Policy, this Global Climate Change Digest issue--August 1997.)

Item #d97aug75

Warming and Penguins: In a seminar sponsored by the U.S. Global Change Research Program, ecologist William Fraser described a new way in which climate change could be affecting penguins. Increased snowfall, caused by regional warming in the western Antarctic Peninsula, may be limiting the nesting area and causing the observed drop in penguin populations. It could also be a sign that warming is affecting other Antarctic ecosystems. His views and those of other scientists are discussed in Science, p. 1790, June 20, 1997.

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