This one, co-authored by meteorologist Anthony Watts (of Watts Up With That? fame) shows that at least half of the “global warming” in the US since 1979 has been fabricated by NOAA.
While satellite records have shown no global warming for at least 18 years, the land based data sets like the ones maintained by NOAA for the US Historical Climate Network (USHCN) continue to show a warming trend.
One reason for this discrepancy, the study suggests, is that NOAA has been cherry-picking its raw data. That is, it has ignored the evidence from those weather stations showing little or no late Twentieth century warming and instead placed undue emphasis on the ones that do show warming.
But the ones that do show warming also happen to be the least trustworthy. These are the ones, the study shows, which have been most corrupted by the Urban Heat Island effect – and other environmental factors.
Some, for example, have been surrounded by buildings or had roads built next to them since they were first sited. Others have had airports vastly expand next door to them. What this inevitably means is that their more recent temperature measurements have been running hot – i.e., they have been distorted by factors which have nothing to do with weather or climate.
Yet, bizarrely, these are the ones that NOAA has been using as the basis for its claims about “global warming” in the US.
If, however, you look at those weather stations that haven’t been corrupted – “unperturbed” stations – what you get is US global warming roughly half as much as NOAA claims.
Read the rest at Breitbart.