http://edition.cnn.com/2006/TECH/science/09/15/global.warming.sun.reut/index
.html
This is the study's abstract:
Variations in solar luminosity and their effect on the Earths climate
P. Foukal1, C. Fro¨hlich2, H. Spruit3 & T. M. L. Wigley4
Variations in the Suns total energy output (luminosity) are caused by
changing dark (sunspot) and bright structures on the solar disk during the
11-year sunspot cycle. The variations measured from spacecraft since 1978
are too small to have contributed appreciably to accelerated global warming
over the past 30 years. In this Review, we show that detailed analysis of
these small output variations has greatly advanced our understanding of
solar luminosity change, and this new understanding indicates that
brightening of the Sun is unlikely to have had a significant influence on
global warming since the seventeenth century. Additional climate forcing by
changes in the Suns output of ultraviolet light, and of magnetized plasmas,
cannot be ruled out. The suggested mechanisms are, however, too complex to
evaluate meaningfully at present.
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So I guess the debate's finally over.. (ha!)
Coby
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