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Solar forcing used in NASA GISS SI2000 simulations.

Other climate forcings shown at http://www.giss.nasa.gov/data/simodel/

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Source: http://www.giss.nasa.gov/data/simodel/solar.irradiance/

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--- Is there something wrong with that NASA data? The page it's link from: http://en.wikipedia.org/wiki/Solar_variation#Solar_variation_theory

...clearly shows that solar variation over the last 30 years is on the order of 0.1% of solar output, or 1.3 W/m^2 on the 1366 W/m^2 solar average. But this plot shows an approximately 0.1 W/m^2 variation in solar forcing. That's a difference of an order of magnitude. This is in fact an important number to get right, since the average global temperature appears to have risen about 0.3% over the past century. This plot suggest that solar forcing has increase ~0.2%, but if it is off by an order of magnitude then the solar forcing alone starts to look like the majority contributor to the measured 0.3% temperature increase (assuming no positive feedbacks, in which case it could conceivably account for all global warming).

~~mjd 11:00 EST 17 November 2006

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	Date/Time	Dimensions	User	Comment
current	21:27, 16 February 2005	566×118 (2 KB)	SEWilco (Talk \| contribs)	(Solar forcing used in NASA GISS SI2000 simulations. {{PD-USGov-NASA}} Source: http://www.giss.nasa.gov/data/simodel/solar.irradiance/ )