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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

FROM VOLUME 5, NUMBER 12, DECEMBER 1992

NEWS...
ANTARCTIC OZONE HOLE

Item #d92dec146

September measurements indicated that the ozone hole was developing faster and covered a greater area than ever observed before, leading to speculation that Antarctic ozone levels would reach a record low this year, with the help of dust particles from Mount Pinatubo (GLOBAL CLIMATE CHANGE DIGEST News, Nov. 1992). Subsequent satellite measurements made by NASA did not reach record low levels, as discussed in Science, p. 395, Oct. 16. However, balloon measurements reported by NOAA did exhibit at some locations the lowest levels of ozone ever recorded--105 Dobson units. They also suggest that the volcanic aerosols did play a part in ozone loss this year, extending serious loss to lower levels of the stratosphere than usual. (See Science News, p. 278, Oct. 24; Intl. Environ. Rptr., p. 670, Oct. 21.)

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