Tag Archives: peterson

Trends in Peterson 2003

Aug 4, 2007 – 3:01 PM

Peterson 2003 stated: Contrary to generally accepted wisdom, no statistically significant impact of urbanization could be found in annual temperatures. Last week, Peterson sent me a list of the 289 sites used in this study, together with the classification into urban and rural. As I noted previously, there are many puzzles in the allocation of […]

By Stephen McIntyre | Posted in Surface Record, UHI | Comments (71)

Peterson’s “Urban” Sites

Aug 3, 2007 – 9:27 PM

I posted up the list of 289 sites from Peterson 2003 purporting to show that the difference between “urban” and rural sites was negligible. (See related posts here and here.) As noted before, the definition of “urban” includes such metropolises as Wahpeton ND and Hankinson ND. Cottage Grove 1S OR is classified as “urban”, while […]

By Stephen McIntyre | Posted in Surface Record, UHI | Comments (29)

Peterson (2003)

Aug 2, 2007 – 12:37 PM

Peterson (2003) online here is an influential study cited by IPCC AR4 purporting to show that the urbanization effect is negligible. It concluded: Using satellite night-lights—derived urban/rural metadata, urban and rural temperatures from 289 stations in 40 clusters were compared using data from 1989 to 1991. Contrary to generally accepted wisdom, no statistically significant impact […]

By Stephen McIntyre | Posted in Scripts, Surface Record, UHI | Comments (51)