The ‘Black Tuesday’ of Climate Science

Watts Up With That?

 Jean S writes at Climate Audit:

Today I will review the timeline of the above WMO 1999 graph in the light of the ClimateGate (CG) letters. The main events took place on Tuesday, November 16th, 1999.

Things start rolling 9 AM (UK time), when Tim Osborn sends  the new Briffa and recalibrated Jones (1998) time series to Phil Jones along with the suggestion to hide the decline.

It is ready calibrated in deg C wrt. 1961-90, against the average Apr-Sep land temperature north of 20N.  It goes from 1402 to 1994 – but you really ought to replace the values from 1961 onwards with observed temperatures due to the decline.

Twenty minutes later Jones writes  to the MBH crew (cc Briffa and Osborn) explaining WMO plans and exactly what the graph will look like.

Jones explained that the graph was intended for the cover of the WMO annual…

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