Link: http://www.climateaudit.org/?p=7844

"Hide the decline" refers to the decline in the Briffa MXD temperature reconstruction in the last half of the 20th century, a decline that called into question the validity of the tree ring reconstructions. (I'm going to analyze the letters on another occasion.) In the IPCC Third and Fourth Assessment Reports, IPCC "hid the decline" by simply deleting the post-1960 values of the troublesome Briffa reconstruction - an artifice that Gavin Schmidt characterizes as an “a good way to deal with a problem" and tells us that there is "nothing problematic" about such an artifice. Clima Depot: UK SCIENTIST: 'CASE FOR CLIMATE FEARS IS BLOWN TO SMITHEREENS...WHOLE THEORY SHOULD BE DESTROYED AND DISCARDED AND UN CONFERENCE SHOULD BE CLOSED': “The world is cooling and has been cooling for 7 years and the leading scientists, so-called 'scientists' have been trying to hide that evidence,” Corbyn said in reference to hacked emails showing top UN IPCC scientists apparently conspiring to manipulate temperature data and exclude scientific studies from peer-review that they did not agree with. “We should end this anti-scientific nonsense now,” Corbyn said. “The data, real data, over the last one thousand, ten thousand or million years, shows THERE IS NO RELATIONSHIP BETWEEN CARBON DIOXIDE AND WORLD TEMPERATURES OR CLIMATE EXTREMES.."