>The mystery deepens — where did that decline go?

Written by on March 18, 2010 in Rest of Europe with 1 Comment

>Check out this interesting piece that I noticed on www.climatedepot.com

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 emails 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 measured temperatures. But Frank shows that the peer reviewed data supports the original graphs and that measured temperature did decline from 1960 onwards, sharply. But in the GISS version of that time-period, temperatures from the cold 1970’s period were repeatedly “adjusted” years after the event, and progressively got 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 that was reduced so far it became a mild warming, against the detailed corroborating evidence from raobcore data. Raobcore measurements are balloon measures, how accurate are they? They started in 1958, twenty years before satellites (which are renown for their efficient reliability). Put the two different methods side by side and they tie together very neatly–telling us that both of them are accurate, reliable tools.
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