February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 5, NUMBER 11, NOVEMBER 1992
TREND ANALYSIS: SOLAR RADIATION AND UV
"Estimating the Sun's Radiative Output during the Maunder Minimum,"
J. Lean (Code 4165L, Naval Res. Lab., Washington DC 20375), Geophys. Res.
Lett., 19(15), 1591-1594, Aug. 3, 1992.
Based on understanding of the variations in total solar irradiance and in Ca
II emission from the Sun and stars, estimates that solar irradiance was 24%
below present during the Maunder Minimum in solar magnetic activity (1645-1715
A.D.). This would have caused a global cooling of 0.2-0.6 ° C, which
compares with the roughly 1 ° C cooling of the Little Ice Age.
"Influence of Clouds on the Detectability of Trends in the UV-B
Irradiance Caused by Reduction of the Total Ozone Content," A.V. Belyavskii
(Central Aerol. Observ., Dolgoprudnyi Ukrainian Regional Sci. Res. Hydrometeor.
Inst. (USRHI), Kiev, Ukraine), Atmos. Opt., 4(9), 692-696, Sep.
Detectability of trends in UV-B irradiance and their significance for
biological systems are estimated from synchronous measurements of the total
ozone content and UV-B irradiance. Concludes that the predicted catastrophic
consequences of ozone depletion are at least disputable.
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