Search Results for: gergis

IPCC Check Kites Gergis

A few days ago, WUWT pointed out that the American Meteorological Society webpage showed that the Gergis et al paper had been officially “withdrawn”. However, readers should know better than to presume that this would have any effect on IPCC use of the reconstruction. The withdrawal of the Gergis article hasn’t had the slightest impact […]

Gergis and Watts Delayed

According to information from the University of Melbourne, Gergis et al was not re-submitted by the end of July, but has been delayed until the end of September. The university stated: Please see latest information below Print publication of scientific study on hold An issue has been identified in the processing of the data used […]

Was Gergis et al “Withdrawn”?

On June 12, David Karoly stated of the then recently disappeared Gergis et al: The paper has been put on hold, while an issue with the data processing and methods that we have identified is checked. The paper has not been withdrawn nor has it been retracted. In a June 13 email to Gergis et […]

More on Screening in Gergis et al 2012

First, let’s give Gergis, Karoly and coauthors some props for conceding that there was a problem with their article and trying to fix it. Think of the things that they didn’t do. They didn’t arrange for a realclimate hit piece, sneering at the critics and saying Nyah, nyah, what about the hockey stick that Oerlemans […]

Gergis et al “Put on Hold”

A few days ago, Joelle Gergis closed her letter refusing data stating: We will not be entertaining any further correspondence on the matter. Gergis’ statement seems to have been premature.  David Karoly, the senior author, who had been copied on Gergis’ surly email and who is also known as one of the originators of the […]

Gergis “Significance”

Jean S observed in comments to another thread that he was unable to replicate the claimed “significant” correlation for many, if not, most of the 27 Gergis “significant” proxies. See his comments here  here Jean S had observed: Steve, Roman, or somebody 😉 , what am I doing wrong here? I tried to check the […]

Gergis’ Two Medieval Proxies

IPCC AR5 (First Draft) cited Gergis et al as follows: New paleo records from Australasia provide evidence of MCA warming around 1250–1330 CE, [my bold] somewhat later than maximum medieval warmth described from many Northern Hemisphere regions (Gergis et al., submitted). Following peak medieval warmth in the early 1300s, a cooling trend reaching a temperature […]

CG2 and Ex Post Picking

Jul 31, 2019: Noticed this as an unpublished draft from 2014. Not sure why I didn’t publish at the time. Neukom, lead author of PAGES (2019) was coauthor of Gergis’ papers. One of the longest-standing Climate Audit controversies has been about the bias introduced into reconstructions that use ex post screening/correlation.   In today’s post, […]

PAGES2K (2017): Antarctic Proxies

A common opinion (e,g, Scott Adams) is that the “other proxies”, not just Mann’s stripbark bristlecone tree rings, establish Hockey Stick. In today’s post, I’ll look at PAGES2K Antarctic data – a very important example since Antarctic isotope data (Vostok) is used in the classic diagram used by Al Gore (and many others) to illustrate […]

PAGES2K (2017) – South America Revisited

The most recent large-scale compilation of proxy records over the past two millennia is PAGES (2017).  They made a concerted effort to archive data (to the credit of Julien Emile-Geay), archiving 692 series, but they perpetuated most other sins within the field.  Rather than abjuring ex post screening, it carried ex post screening to extremes never […]