Tahoe City, CA (burn barrel, close by parking, tennis court surface 25 feet away built in early 1980’s)
When someone tries to tell you the earth is warming according to surface measurements, feel free to call them an idiot, or better yet, point them to Anthony Watts’ surfacestations.org project which has the lofty goal of collecting photos of every surface temperature station used to measure the climate in the world.
The photo above is from the Odd sites page, a collection of some of the most obscure stations located near probable heat sources that most definitely bias the measurements.
See Watts’ “Is the U.S. Surface Temperature Record Reliable?" report for more photos and analysis of horribly placed stations.
Finally, for those who like reading scientific journals, the author has been published in the peer-reviewed Journal of Geophysical Research: “Analysis of the impacts of station exposure on the U.S. Historical Climatology Network temperatures and temperature trends.”
So, we’ve only been measuring temperature for a blip of time in the grand scheme of things, and our measuring process is hosed.
Now, if your liberal friend (or enemy) thinks stations placed next to trash burning barrels, A/C exhaust vents, parking lots, industrial plants, and water, sewage, or waste treatment plants should be used in measuring the temperature and as the basis of major scientific conclusions, they are an idiot or worse.