“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 (see here.
Not only were the post-1960 values of the Briffa reconstruction not shown in the IPCC 2001 report – an artifice that Gavin describes as being “hidden in plain sight”, they were deleted from the archived version of the reconstruction at NOAA here (note: the earlier Briffa 2000 data here does contain a related series through to 1994.)
Here’s the graph, with the decline added back in.
Wow, look at that decline that somehow wasn’t included in the graphs made the global warming alarmists. Did they use a trick to hide the decline?
Hide the decline
And here’s a catchy video to help you remember all of this. (H/T Lex Communis)
The scary part is that two of my leftist friends still kept their faith in global warming after this scandal broke. It’s a religion, but one that is diconfirmed by the evidence.
Here are a few of my favorites, with links to the original e-mails.
Phil Jones writes to University of Hull to try to stop sceptic Sonia Boehmer Christiansen using her Hull affiliation. Graham F Haughton of Hull University says its easier to push greenery there now SB-C has retired.(1256765544)
Michael Mann discusses how to destroy a journal that has published sceptic papers.(1047388489)
Tim Osborn discusses how data are truncated to stop an apparent cooling trend showing up in the results (0939154709). Analysis of impact here. Wow!
Phil Jones encourages colleagues to delete information subject to FoI (Freedom of Information) request.(1212063122)
Phil Jones says he has use Mann’s “Nature trick of adding in the real temps to each series”…to hide the decline”. Real Climate says “hiding” was an unfortunate turn of phrase.(0942777075)
Kevin Trenberth says they can’t account for the lack of recent warming and that it is a travesty that they can’t.(1255352257)
Tom Wigley discusses how to deal with the advent of FoI law in UK. Jones says use IPR argument to hold onto code. Says data is covered by agreements with outsiders and that CRU will be “hiding behind them”.(1106338806)
Reaction to McIntyre’s 2005 paper in GRL. Mann has challenged GRL editor-in-chief over the publication. Mann is concerned about the connections of the paper’s editor James Saiers with U Virginia [does he mean Pat Michaels?]. Tom Wigley says that if Saiers is a sceptic they should go through official GRL channels to get him ousted. (1106322460) [Note to readers – Saiers was subsequently ousted]
Later on Mann refers to the leak at GRL being plugged.(1132094873)
; Computes regressions on full, high and low pass Esper et al. (2002) series,
; anomalies against full NH temperatures and other series.
; CALIBRATES IT AGAINST THE LAND-ONLY TEMPERATURES NORTH OF 20 N
; Specify period over which to compute the regressions (stop in 1960 to avoid
; the decline
With the release of hundreds of emails by scientists advocates of global warming showing obvious and entirely inappropriate collusion by the authors — including attempts to suppress dissent, to punish journals that publish peer-reviewed studies casting doubt on global warming, and to manipulate data to bolster their own arguments — even the New York Times is forced to concede that “the documents will undoubtedly raise questions about the quality of research on some specific questions and the actions of some scientists.” But apparently the paper’s environmental blog, Dot Earth, is taking a pass on publishing any of the documents and emails that are now circulating.