Temperature monitoring stations exist around the globe, on both land and sea, and we see a clear warming trend from many locations. (ucsusa.org)
The number of temperature monitoring stations is decreasing and many areas across -LSB-...] (notrickszone.com)
This how data is cherry picked and has been mentioned before on WUWT that many temperature monitoring stations are near airport runways, where the black body radiation is higher and the heat from the jet engines of the planes is not taken into account. (wattsupwiththat.com)