Quote:
Originally Posted by korjik
The discussion is wether the change in temp is due to a change in solar flux, or a change in the heat flow at the Earth. Current thought is that the solar flux hasnt changed enough to explain the recent changes in temp.
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From what I have read on this subject, the claimed warming due to variation in solar output has at least 3 sources:
1. Change in solar irradiation that correlates with sunspot cycle.
2. Change, concurrent with 1, that effects magnetic field shielding from cosmic rays. Reduced cosmic rays entering the atmosphere result in decreased aerosol formation which in turn results in decreased cloud formation and thus increased heating. Increased cosmic rays result in cooling.
These two have probably been discussed here, as they have been discussed at length in other forums.
3. Joule heating of the earth atmosphere caused by variation in the solar wind. I believe this is a relatively new finding after about 10 years of data taking, and is now starting to be included in climate models. It may be the largest solar effect found to date.
TomT