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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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Climate Misinformation by Source: Anthony Watts

Anthony Watts is an American TV weather presenter and runs the blog Watts Up With That. He founded, which questions the reliability of the surface temperature record. Typically more than half of Watts' live presentations feature photos of poorly sited weather stations.

However, the surface temperature record is one line of evidence among thousands of lines of evidence for global warming. Ice sheets are melting, sea levels are rising, glaciers are retreating, thousands of species are migrating, seasons are shifting, local populations of species are going extinct. As for the temperature record, warming is also being observed over the ocean, well away from urban heat island and microsite influences.

Lastly, satellite measurements independently find the same warming trend as the surface record, leading prominent skeptic Roy Spencer (head of the UAH satellite team) to conclude about the HadCRUT surface record, "Frankly our data set agrees with his, so unless we are all making the same mistake we're not likely to find out anything new from the data anyway".

The full body of evidence presents a consistent and overwhelming picture of global warming. Anthony Watts' critique of the surface temperature record is an attempt to distract from this larger picture.

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