Search Results for: Pages

Revisions to Pages2K Arctic

Kaufman and the PAGES2K Arctic2K group recently published a series of major corrections to their database, some of which directly respond to Climate Audit criticism. The resulting reconstruction has been substantially revised with substantially increased medieval warmth. His correction of the contaminated Igaliku series is unfortunately incomplete and other defects remain.

PAGES2K Online “Journal Club”

I’m listening to a presentation by PAGES2K authors sponsored by Nature: http://blogs.nature.com/ofschemesandmemes/2013/05/02/npg-journal-club-how-has-earths-climate-changed-in-the-past-2000-years-npgjclub#comment-1503 Started at 11 am Eastern. 11:30. Open for questions. I have submitted the following: Can you explain the decision to label the article as only a “Progress Article”, rather than a Research Article? Nature’s definition of Progress Articles http://www.nature.com/ngeo/authors/content_types.html says that such articles […]

PAGES2K: Gifford Miller vs Upside-Down Kaufman

The PAGES2K Arctic reconstruction uses Gifford Miller’s Hvitavatn (Iceland) data upside down. The error “matters” because this series is one of rather few PAGES2K series that show a Hockey Stick. Such gross errors ought to be corrected before the data is cited for policy purposes or said to confirm previous studies.

PAGES2K Reconstructions

The PAGES2K article to be published tomorrow will show eight regional reconstructions, which are plotted below. In today’s post, I’ll try to briefly summarize what, if anything, is new about them. Antarctica: This is a composite of 11 isotope series (mostly d18O). It includes some new data (e.g. Steig’s new WAIS series) and some long […]

PAGES2K South America

A commenter observed that the forthcoming PAGES2K received over 50 pages of review comments from one reviewer. One wonders what he had to say about the PAGES2K South American network which has some very odd characteristics. Here is a list of proxies with a couple of interesting features highlighted. First, note that the “proxy” network […]

PAGES2K, Gergis and Made-for-IPCC Journal Articles

March 15, 2013 was the IPCC deadline for use in AR5 and predictably a wave of articles have been accepted. The IPCC Paleo chapter wanted a graphic on regional reconstructions and the PAGES2K group has obligingly provided the raw materials for this graphic, which will be published by Nature on April 21. Thanks to an […]

A “Good” Proxy on the Antarctic Peninsula?

Nearly all of the text of this article on an interesting ice core proxy series (James Ross Island) from the Antarctic Peninsula was written in June 2014, but not finished at the time for reasons that I don’t recall.  This proxy was one of 16 proxy series in the Kaufman 12K pdf. 60-90S reconstruction. I […]

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, […]

The impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity

A guest post by Nic Lewis Judith Curry and I have now updated the LC15 paper with a new paper that has been published in the Journal of Climate There has been considerable scientific investigation of the magnitude of the warming of Earth’s climate by changes in atmospheric carbon dioxide (CO2) concentration. Two standard metrics […]

Attribution of 2015-6 Phishing to APT28

In two influential articles in June 2016, immediately following the Crowdstrike announcement, SecureWorks (June 16 here and June 26 here) purported to connect the DNC hack to a 2015-6 phishing campaign which they attributed to APT28.  SecureWorks identified two malicious domains in their article. In today’s article, I’ll show that infrastructure from one domain are connected […]