GISS/NASA/NOAA graphics illustrate significant UHI truths

In a 2000 paper submitted to JGR-Atmospheres GISS lead authors and several other leading US experts in the field of temperature data history include two very simple diagrams which illustrate major truths about how how urban influences impact on temperature station data.

They go to the issue of what temperature trends may have been if […]

San Juan Puerto Rico, EXACTLY how UHI warming can get into global gridded T trends.

San Juan was studied in the 1980’s by C.E Duchon who published in 1986, "Temperature Trends at San Juan, Puerto Rico, Bull.Amer.Met.Soc. 67, 1370-1377. A downloadable pdf file of this paper is available through BAMS. Click on Print Version for Duchon, Claude E.

My 20th Anniversary Review of Jones et al 1986 explores how San […]

Urban cooling in Sweden?

Do you know that GISS sometimes correct temperature data for supposed urban cooling? Let us look at examples from southern Sweden.

The three towns Karlstad, Jönköping, and Visby all have small airports. Of these towns, Visby is located on Gotland, the largest island in the Baltic Sea. Karlstad lies on the northern shores of the […]