I FOLLOW THIS SITE BUT IT NEEDS REPEATING
By Paul Homewood
Since 1987, the National Oceanic and Atmospheric Administration’s (NOAA’s) National Climatic Data Center (NCDC) has used observations from the U.S. Historical Climatology Network (USHCN) to quantify national- and regional-scale temperature changes in the conterminous United States (CONUS). Or at least, that is, until last February.
The USHCN is actually a designated subset of the NOAA Cooperative Observer Program (COOP) Network. The USHCN sites having been selected according to their spatial coverage, record length, data completeness, and historical stability. In other words, a high quality network, which consisted of 1218 stations.
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