Prof. Robert Carter: Evidence for man-made climate change

By Prof. Robert M. Carter, James Cook University, Queensland, Australia December 9, 2009

Edited by Andy May [comments in square brackets]

I’ve always liked this essay, written by the late Dr. Bob Carter in 2009. It has been plagued by some formatting issues that detract from the excellent content. This version fixes the formatting problems in the original. In particular the spacing is improved and the “°” symbols in the original had been made into zeros. Besides fixing the formatting issues, adding some graphs, a few hyperlinks and updates in square brackets, I’ve left it as Professor Carter wrote it.

Ten facts about climate change

  • Climate has always changed, and it always will. The assumption that prior to the industrial revolution the Earth had a “stable” climate is simply wrong. The only sensible thing to do about climate change is to prepare for it.
  • Accurate temperature measurements made from weather balloons and satellites since the late 1950s show no atmospheric [tropospheric] warming since 1958.  In contrast, averaged ground-based thermometers record a warming of about 0.4°C [0.7°C through 2015] over the same time period. Many scientists believe that the thermometer record is biased by the Urban Heat Island effect and other artefacts. [Below are graphs of the UAH satellite troposphere temperature anomaly measurements (which only go back to 1979) , the Hadley CRU surface temperature anomalies and the RATPAC A global weather balloon temperature anomalies averaged to 19 km and to 7 km. The top of the troposphere varies from 7 km at the poles in the winter to 20 km near the equator. Dr. Carter’s point that it depends on where you measure the “average” temperature is well taken.]


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