When future generations try to understand how the world got carried away
around the end of the 20th century by the panic over global warming, few
things will amaze them more than the part played in stoking up the scare by
the fiddling of official temperature data. There was already much evidence
of this seven years ago, when I was writing my history of the scare, The
Real Global Warming Disaster. But now another damning example has been
uncovered by Steven Goddard’s US blog Real Science, showing how shamelessly
manipulated has been one of the world’s most influential climate records,
the graph of US surface temperature records published by the National
Oceanic and Atmospheric Administration (NOAA).
Goddard shows how, in recent years, NOAA’s US Historical Climatology Network
(USHCN) has been “adjusting” its record by replacing real temperatures with
data “fabricated” by computer models. The effect of this has been to
downgrade earlier temperatures and to exaggerate those from recent decades,
to give the impression that the Earth has been warming up much more than is
justified by the actual data. In several posts headed “Data tampering at
USHCN/GISS”, Goddard compares the currently published temperature graphs
with those based only on temperatures measured at the time. These show that
the US has actually been cooling since the Thirties, the hottest decade on
record; whereas the latest graph, nearly half of it based on “fabricated”
data, shows it to have been warming at a rate equivalent to more than 3
degrees centigrade per century."
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