Several AGW doubters have once again raised the issue that surface temperature measurement stations are sometimes located in urban heat island areas. We've discussed this several times before, but apparently it needs to be discussed again.
"The evidence points to a warming of about 0.6-0.8°C over the past century and a neglible effect on this from the [urban heat islands]. While some 'contrarians' appear determined not to accept this finding, the evidence they cite appears thin indeed compared with the published research"
http://www.realclimate.org/index.php?p=43
Further discussions here:
http://ams.confex.com/ams/pdfpapers/102322.pdf
http://www.logicalscience.com/skeptic_arguments/urban-heat-islands.html
http://www.nature.com/nature/journal/v432/n7015/abs/432290a.html
The fact that satellite measurements agree with surface measurements, and that there's no reason for nearby sources to provide steadily increasing amounts of heat should be enough to dismiss this claim.
2007-10-11
05:34:12
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13 answers
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asked by
Dana1981
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Global Warming