Aging weather stations contribute to high temperature records

Watts Up With That?

New paper finds that aging weather stations record much higher daytime temperatures, 1.63°C higher than new stations

While we are all watching the heat wave developing in the US southwest, here is something to consider. Albedo on the surfaces of weather station shelters changes with time, something I and the volunteers have documented with the Surface Stations project. For example, here’s a aged weather station where the whitewash coating is coming off and the bare wood is becoming exposed:stevenson_screen_12-27-07.jpg

Back in 2007, Pat Michaels wrote in an American Spectator column “Not so Hot“:

“Weather equipment is very high-maintenance. The standard temperature shelter is painted white. If the paint wears or discolors, the shelter absorbs more of the sun’s heat and the thermometer inside will read artificially high. But keeping temperature stations well painted probably isn’t the highest priority in a poor country.”

Now there is proof that changes…

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