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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 1, JANUARY 1997

REPORTS...
OZONE DEPLETION: NORTHERN HEMISPHERE

Item #d97jan78

Northern Hemisphere Winter Summary - 1995-96— 1995-1996, NOAA, 1996 (NOAA/Clim. Predict.). 

An annual summary confirming recent World Meteorological Organization reports of substantial ozone depletion over the Northern Hemisphere. Over the north polar regions, Greenland, northern Europe, and northern Siberia, total ozone in March 1996 was 20-25% lower than values from the early 1980s. Also confirms that stratospheric temperatures in the Northern Hemisphere reached record or near-record lows during much of the 1995-1996 winter, although in recent months near-normal temperatures prevailed over the middle latitudes.

Item #d97jan79

Stratospheric Ozone 1996 (Ref. No. 96DPL0021), U.K. Stratospheric Ozone Review Group, Nov. 1996 (U.K. Dept. Environ.).

This annual review by an independent advisory group examines the continuing decline in ozone observed at high- and mid-latitudes in both hemispheres. It focuses on depletion over populated latitudes such as the U.K., and explains why low ozone levels observed over northern Britain are likely to reoccur in the future. While chlorine loading of the troposphere passed its peak in 1993, bromine loading continues to increase. New calculations strengthen the suggestion that stratospheric ozone loss has offset at least 30% of the warming of greenhouse gases. (See Global Environ. Change Rep., pp. 1-3, Nov. 22, 1996.)