how not to calculate temperatures, pt. 2

how not to calculate temperatures, pt. 2

The U.S. Historical Climatological Network (USHCN) was put together in the late 1980s, with 1218 stations chosen from a larger population of 7000-odd cooperative network stations based on their long continuous records and geographical distribution. The group’s composition has been left largely unchanged, though since the late 1980s a number of stations have closed or stopped reporting. Much of this is due to the nature of the instruments; many USHCN stations are manned by volunteers (and are not automated instruments), and these volunteers may quit or pass away over the decades. Since the 1980s the number of reporting USHCN stations has slowly declined from 1218 in the 1980s to closer to 900 today, as shown in the figure below. As an aside, this is quite similar to what happened with GHCN, which birthed the frustratingly-persistent “march of the thermometers”meme. Unsurprisingly, the flaw in Goddard’s analysis mirrors that of E.M. Smith’s similar claims regarding GHCN.

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