re: #344 horse

The theory of AGW is not based upon surface temperature readings, from any site.

Temperature compilations (whether GISS or Hadley Center) are used to empirically derive what the climate sensitivity is to a standard measurement of atmospheric composition. In other words, to answer the question: What will be the temperature rise after 100 years if we double the amount of CO2 in the atmosphere?…. one can try to do this by matching temperatures with measured atmospheric composition.

But again, the idea that {changing the atmospheric composition will cause a change in the Earth’s mean temperature} is not based upon temperature measurements at weather sites.