Homogenization of temperature data makes Capetown South Africa have a warmer climate record

Playing around with my hometown data, I was horrified when I found what NASA had done to it.  Even producing GISTEMP Ver 2 was counterfactual. Guest essay by Philip Lloyd The raw data that is fed to NASA in order to develop the global temperature series is subjected to “homogenization” to ensure that it does…

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Improving Climate Literacy: 'Temperature Homogenization Activity'

Guest essay by Jim Steele In 2012 the National Academies of Science published A Framework For K-12 Science Education Practices, Crosscutting Concepts, and Core Ideas. Although the framework often characterizes climate change as a negative and disruptive phenomenon, the framework clearly states students need to understand all the factors causing climate change writing, “Natural factors…

Important study on temperature adjustments: 'homogenization…can lead to a significant overestimate of rising trends of surface air temperature.'

From the “we told you so” department comes this paper out of China that quantifies many of the very problems with the US and global surface temperature record we have been discussing for years: the adjustments add more warming than the global warming signal  itself A paper just published in Theoretical and Applied Climatology finds…

Circularity of homogenization methods

Guest post by David R.B. Stockwell PhD I read with interest GHCN’s Dodgy Adjustments In Iceland by Paul Homewood on distortions of the mean temperature plots for Stykkisholmur, a small town in the west of Iceland by GHCN homogenization adjustments. The validity of the homogenization process is also being challenged in a talk I am…

New paper blames about half of global warming on weather station data homogenization

From the told ya so department, comes this recently presented paper at the European Geosciences Union meeting. Authors Steirou and Koutsoyiannis, after taking homogenization errors into account find global warming over the past century was only about one-half [0.42°C] of that claimed by the IPCC [0.7-0.8°C]. Here’s the part I really like:  of 67% of…