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Hide the Decline explained March 10, 2011

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Hide the Decline explained

The mystery deepens: Where did that decline go? March 19, 2010

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The mystery deepens: Where did that decline go?

JoNova, March 18, 2010

Frank Lansner has done some excellent follow-up on the missing “decline” in temperatures from 1940 to 1975, and things get even more interesting. Recall that the original “hide the decline” statement comes from the ClimateGate e-mails and refers to “hiding” the tree ring data that shows a decline in temperatures after 1960. It’s known as the “divergence problem” because tree rings diverge from the allegedly measured temperatures. But, Frank shows that the peer reviewed data supports the original graphs, and that real measured temperatures did decline from 1960 onwards…sharply. Yet, in the GISS version of that period, temperatures from the cold 1970’s were repeatedly “adjusted” years later, and progressively made warmer.

The most mysterious period is from 1958 to 1978, when a steep 0.3C decline was initially recorded in the Northern Hemisphere. Years later, this was reduced so far it became a mild warming against the detailed corroborating roabcore evidence. Raobcore measurements are balloon readings. How accurate are they? They started in 1958, twenty years before satellite temperature records (which are renowned for their accuracy). Put the two methods side-by-side, and they tie together neatly, telling us that both of them are accurate, reliable tools.

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Understanding Climate-Gate’s Hidden Decline December 22, 2009

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Understanding Climate-Gate’s Hidden Decline

Written by Marc Sheppard
SPPI, December 21, 2009

Close followers of the Climategate controversy know that much of the mêlée surrounds an e-mail in which Climate Research Unit (CRU) chief Phil Jones wrote about using “Mike’s Nature Trick” (MNT) to “hide the decline.” And yet, seventeen days and thousands of almost exclusively on-line op-eds into this scandal, it still seems that very few understand exactly which “decline” was being hidden, what “trick” was used to do so, and why Jones’s words have become the slogan for the greatest scientific fraud in history

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