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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: RetiredNow who wrote (4183)	1/12/2009 3:24:57 PM
From: RetiredNow	Read Replies (1) \| Respond to of 86356

According to Shindell, the new study also confirms that changing levels of energy from the sun are not a major cause of global warming. Many scientists have argued that the radiation change in a solar cycle — an increase of two to three tenths of a percent over the 20th century — are not strong enough to account for the observed surface temperature increases. The GISS model agrees that the solar increases do not have the ability to cause large global temperature increases, leading Shindell to conclude that greenhouse gasses are indeed playing the dominant role. The general circulation model used in the study included solar radiation data from NASA's Upper Atmospheric Research Satellite, launched in 1991. With data from UARS, which was used to calculate ozone changes, scientists have good measurements of how much radiation the sun puts out, increasing the accuracy of the new model. giss.nasa.gov