The mystery deepens: Where did that decline go? March 19, 2010Posted by honestclimate in Discussions.
Tags: climate change, global warming, Hide the Decline
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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