McIntyre finds the Marcott 'trick' – How long before Science has to retract Marcott et al?

Steve McIntyre has made what I can only describe as a stunning discovery as to why there is a sharp uptick in the main Marcott et al graph being touted by the media from its publication in Science. It seems the uptick in the 20th century is not real, being nothing more than an artifact…

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Marcott's uptick – a result of proxy sign inconsistency

Shades of upside down Tiljander. McIntyre is delving further into the Marcott proxy issue and it looks almost certain now there’s a statistical processing error (selection bias). Steve McIntyre writes: In the graphic below, I’ve plotted Marcott’s NHX reconstruction against an emulation (weighting by latitude and gridcell as described in script) using proxies with published…

NOAA’s Ever-Changing Definition of La Niña Years

UPDATE: I’ve added two illustrations to the end of the post. At the request of blogger “Kurt in Switzerland”, I plotted a comparison of the new and old versions of the Oceanic NINO Index data and posted it in a comment. I also plotted the difference, which is much more interesting. Both graphs have been…