US climate sees decline in both hot and cold extreme temperatures since 1899, researchers claim

A comprehensive new study extending the U.S. Historical Climatology Network (USHCN) record back to 1899 finds that both hot and cold temperature extremes across the contiguous United States have declined over the past 127 years. The research, performed by Dr. John R. Christy, Alabama State Climatologist (retired) and professor of atmospheric and Earth science at The University of Alabama in Huntsv
Source
Phys.org
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