I have a new tool for evaluation of the micro-site measurement environment near thermometers. The first site I’ve surveyed has not one but two potential biases. Can you spot them? Can you guess what they are?
This may be the first image of it’s kind. I don’t recall seeing IR photo’s of NOAA thermometers in situ local environment anywhere before. Correct me if I’m wrong.
Read on to see the picture in visible light for comparison…
As you can see, the NOAA MMTS official thermometer is at the edge of a swimming pool, with the stucco wall of the observers residence just 29 feet away. You can see the heat from the residence in the stucco, and the pool, which is also warmer than the ambient air. The air temperature when this photo was taken was 54°F or 12°C. The pool appears to be about 14°C. of course the pool will be significantly warmer than the ambient air at night this time of year.
Here is another view with a wider angle:
This is the official USHCN station for Livermore, CA. I’ll have a complete writeup on this in the near future, but for now you can see the photo gallery here at surfacestations.org