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WASHINGTON: The upper reaches of Earth's atmosphere are unexpectedly shrinking and cooling due to lower ultraviolet radiation from the Sun, U.S. scientists said.
The Sun's energy output dropped to unusually low levels from 2007 to 2009, a significantly long spell with virtually no sunspots or solar storms, according to scientists from the National Center for Atmospheric Research in Boulder, Colorado.
During that period, the thermosphere, whose altitude ranges from about 90 to 500 kilometers, shrank and contracted from the sharp drop in ultraviolet radiation, said the study published in Geophysical Research Letters.
Originally posted by XPLodER
reply to post by OrphenFire
my theory is that the sun powers our protective magnetic shield in an induced manner so when the sun powers up so will our shield
no proof only theory