You may recall Hansen’s strange splice of modern instrumental records with a Mg/Ca SST proxy ending in 4320 BP based on a partially dissolved core.’ A couple of months ago, I mentioned a new paper by Newton et al (including L Stott) with a high Warm Pool MWP and briefly discussed Netwon’s presentation at AGU (which additionally used modern Mg/Ca values from 1990-1994 as reference.)’ Here is an interesting diagram of Warm Pool SSTs from Lowell Stott, a senior researcher in the field. Unfortunately the webpage didn’t specify what core this was from or otherwise specify the calculation.’ However, the diagram does seem somewhat inconsistent with Hansen’s claim about it being the warmest in a milllll-yun years, if it wasn’t even the warmest in a 1000 years. But Hansen’s article was personally reviewed by Ralph Cicerone, President of NAS.
Update: Lowell Stott confirmed that this is MD81, discussed in Stott et al 2004.