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Global Climate Change Digest

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




Item #d94apr12

Two items from Science, 263(5153), Mar. 18, 1994:

"Did Pinatubo Send Climate-Warming Gases into a Dither?" R.A. Kerr, 1562. Speculates why the increase in three greenhouse gases--carbon monoxide (next article), methane, and nitrous oxide--sharply slowed or stopped in 1991. One possibility is the effect of Mount Pinatubo.

"Recent Changes in Atmospheric Carbon Monoxide," P.C. Novelli (CIRES, Univ. Colorado, Boulder CO 80309), K.A. Masarie et al., 1587-1590. Measurements from 27 locations between 71·N and 41·S show that levels have decreased worldwide over the past two-to-five years, reversing a 30-year increasing trend. The decrease is abrupt in the tropics compared to high northern latitudes.

Item #d94apr13

"Coral Bleaching Threatens Oceans, Life," R.S. Montgomery (U.S. Naval Acad., Annapolis, Md.), A.E. Strong, Eos, 75(13), 145-147, Mar. 29, 1994.

Compares cases of coral bleaching with Bermuda water temperature data. The limited studies done so far have not revealed any evidence that gobal-scale warming of the oceans is responsible for the cases of coral bleaching observed throughout the world.

Item #d94apr14

"The Influence of Climate Change and the Timing of Stratospheric Warmings on Arctic Ozone Depletion," J. Austin (Meteor. Office, London Rd., Bracknell RG12 2SZ, UK), N. Butchart, J. Geophys. Res., 99(D1), 1127-1145, Jan. 20, 1994.

Uses a 3-D dynamical-radiative-photochemical model to show that any significant risk of an Arctic ozone hole will be confined to those years with a late stratospheric warming.

Item #d94apr15

"Record Drilling Depth Struck in Greenland," P.A. Mayewski (Inst. Study of Earth, Ocean & Space, Univ. New Hampshire, Durham NH 03824), M. Wumkes et al., Eos, 75(10), 113, 119, 124, Mar. 8, 1994.

Last July the Greenland Ice Sheet Project (GISP2) hit bedrock, producing the deepest ice core ever recovered (3053 meters). This article reviews the program, and its results (including anthropogenic influences), and future goals.

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