January 17, 2015 (San Diego’s East County)--NASA's Goddard Institute For Space Studies has reduced global temperature data from the National Oceanic and Atmospheric Administration. Their "GISS Analysis" uses satellite measurements of night lighting to locate population centers. GISS uses this population map to statistically remove the artificial warming of cities, known as the "Urban Heat Island Effect," or UHI, from the NOAA's ground station data. In the opinion of this author, that correction makes the NASA GISS's data the most reliable estimate of the near surface temperature of our planet. Please see:
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