The temperature sensor at the Picacho Peak visitor’s center is used as part of the official federal temperature record. But the siting of that station is guaranteed to produce warm biased temperatures.
As you can see from the photo, the visitor center is surrounded by desert, but the temperature sensor is not in the desert, it is next to a building at the red spot.
The temperature sensor is that white box on a brown pole on the right side of the photo. It is sited on the southwest side of a building so that radiation from the brick wall will elevate the temperature recorded. It is near an asphalt street so that radiation will elevate temperatures. It is within range of the exhaust from heat exchangers also.
This is how the feds measure surface temperature. Is it any wonder why they can claim that almost every year was the hottest ever?
See more photos and commentary at Watts Up With That? Blog here.
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You can read my comprehensive, 28-page essay on climate change here: http://wp.me/P3SUNp-1bq