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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, NUMBER 2, FEBRUARY 1994

PROFESSIONAL PUBLICATIONS...

• OF GENERAL INTEREST: OZONE DEPLETION

Item #d94feb7

"Do Hydrofluorocarbons [HFCs] Destroy Stratospheric Ozone?" A.R. Ravishankara (Aeronomy Lab., NOAA, 325 Broadway, Boulder CO 80303), A.A. Turnipseed et al., Science, 71(5143), 71-75, Jan. 7, 1994.

Some scientists have voiced concern that HFCs and even some HCFCs, now gaining wide acceptance as substitutes for chlorofluorocarbons (CFCs), may also be capable of destroying stratospheric ozone. However, laboratory measurements of reaction rates and subsequent modeling reported here confirm, for the first time, that this is not the case.

Item #d94feb8

"Unprecedented 1993 Ozone Decrease over the United States from Dobson Spectrophotometer Observation," W.D. Komhyr (CIRES, Univ. Colorado, Boulder CO 80309), R.D. Grass et al., Geophys. Res. Lett., 21(3), 201-204, Feb. 1, 1993.

Observations, conducted since the 1960s at five locations and since 1983 at one additional location, show an ozone decrease of 12.6% below the long-term normal during the winter and spring months of 1993, implying a possible average increase in UV erythemal radiation at that time of 16-25%. UV erythemal radiation may have been 11-17% higher than normal at these stations during the summer of 1993.

Item #d94feb9

"Skin Cancer and UV Radiation," S. Madronich (NCAR, POB 3000, Boulder CO 80307), F.R. de Gruijl, Nature, 366(6450), 23, Nov. 4, 1993.

Updates 1992 estimates of the increases in UV radiation doses and skin cancer due to stratospheric ozone depletion, using new satellite data and new data on skin cancer induction by UV radiation. Compared to the first estimate, the high-latitude trend toward increased cancer persists, and the uncertainty of the estimate is considerably lower.