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November 13, 2009
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Much of the nation's warming is happening at night, when record lows occur less often.
Much of the nation's warming is happening at night, when record lows occur less often.
Credit: NCAR/National Science Foundation
Videos credited to the National Science Foundation, an agency of the U.S. Government, may be distributed freely. However, some materials within the videos may be copyrighted. If you would like to use portions of NSF-produced programs in another product, please contact the Video Team in the Office of Legislative and Public Affairs at the National Science Foundation.
Additional information about general usage can be found in Conditions.
Related story: Record Highs Far Outpace Record Lows Across U.S.