Infrastructure encroachment at a NOAA Climate Reference (USCRN) site makes the data warmer

Watts Up With That?

Guest analysis by Gary Boden

A little history

Poorly sited stations in the U.S. Historical Climate Network (USHCN) have been documented extensively at WUWT in many posts and by the Surface Stations project Anthony started over a decade ago.

The USHCN is a 1,219 station subset of the much larger NOAA Cooperative Observer Program (COOP) Network that was selected for baseline monitoring of long-term temperature trends in the contiguous United States. See for more information.

Between 2007 and 2012 dozens of Surface Stations project volunteers surveyed 82.5% of the network to document just how poorly it conformed to specifications. The effort resulted in publication (Fall, et al. 2011) of a strong critique of siting deficiencies that bias reported temperatures and call into question the suitability of USHCN data for climate research.


CRN 1 – a clear flat surface with sensors located at least 100 m from artificial heating…

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