When future generations look back on the
global-warming scare of the past 30 years, nothing will shock them more than
the extent to which the official temperature records – on which the entire
panic ultimately rested – were systematically “adjusted” to show the Earth as
having warmed much more than the actual data justified.
One of the first examples of
these “adjustments” was exposed in 2007 by the statistician Steve McIntyre,
when he discovered a paper published in 1987 by James Hansen, the scientist
(later turned fanatical climate activist) who for many years ran Giss Hansen’s
original graph showed temperatures in the Arctic as having been much higher
around 1940 than at any time since. But
as Homewood reveals in his blog post, “Temperature adjustments
transform Arctic history”, Giss has turned this upside down. Arctic temperatures from that time have been
lowered so much that that they are now dwarfed by those of the past 20 years.
Homewood’s interest in the Arctic
is partly because the “vanishing” of its polar ice (and the polar bears) has
become such a poster-child for those trying to persuade us that we are
threatened by runaway warming. But he
chose that particular stretch of the Arctic because it is where ice is affected
by warmer water brought in by cyclical shifts in a major Atlantic current –
this last peaked at just the time 75 years ago when Arctic ice retreated even
further than it has done recently. The
ice-melt is not caused by rising global temperatures at all.
Of much more serious significance, however,
is the way this wholesale manipulation of the official temperature record – for
reasons GHCN and Giss have never plausibly explained – has become the real
elephant in the room of the greatest and most costly scare the world has known.
This really does begin to look like one
of the greatest scientific scandals of all time.
SOURCE:
http://www.telegraph.co.uk/news/earth/environment/globalwarming/11395516/The-fiddling-with-temperature-data-is-the-biggest-science-scandal-ever.html
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