Here’s a photo showing one example of how global temperatures are measured incorrectly.
Here’s the Climate Monitoring Weather Station at the University of Arizona, Tucson, measuring temperature in the University parking lot if front of the Atmospheric Science Building.
Let that sink in.
And many famous climatologists objected to the data being collected.
In 1999, the National Academy of Sciences, the research arm of the National Research Council, released a study expressing concern about the accuracy of the data used in the debate over climate change. They said there are,
“Deficiencies in the accuracy, quality and continuity of the records,” that “place serious limitations on the confidence that can be placed in the research results.”
…
Despite this, the IPCC committed to the surface data even though elsewhere decisions were made to reduce the number of stations and thus further limit the coverage. There were two main reasons for the reduction, the increasing diversion of funds to global warming research and expensive computer models, and the anticipation of weather data from satellites.