Site: Climate Audit

Slant: Sceptic

Active: yes


Climate Audit is run by Stephen McIntyre a Canadian mathematician, former minerals prospector, and semi-retired mining consultant. Although he himself is modest about his achievements, he is known worldwide for his astute analysis of climate data and forensic critique of the temperature record of the past 1000 years. Amongst his triumphs is his revelation that the so called "hockey-stick" which was the icon of catastrophic global warming was nothing but a statistical trick. Climate Audit was started on Jan 31, 2005. Prior to its startup Steve had some notes at a prior website http://www.climate2003.com (earliest 3/12/2004), which were transferred to the CA blog at its start-up.

Recent Articles

Climate Audit: Part 2- The TV5 Monde Hack and APT28

In his attribution of the DNC hack, Dmitri Alperovitch, of Crowdstrike and the Atlantic Council, linked APT28 (Fancy Bear) to previous hacks at TV5 Monde in France and of the Bundestag in Germany: FANCY BEAR (also known as Sofacy or APT 28) is a separate Russian-based threat actor, which has been active since mid 2000s

2017-10-10 19:33   Click to comment

Climate Audit: From Nigerian Scams to DNC Hack Attribution – Part 1

In Crowdstrike’s original announcement that “Russia” had hacked the DNC, Dmitri Alperovitch said, on the one hand, that the “tradecraft” of the hackers was “superb” and their “operational security second none” and, on the other hand, that Crowdstrike had “immediately identified” the “sophisticated adversaries”.  In contrast, after three years of investigation of Climategate, UK…

2017-10-06 17:03   Click to comment

Climate Audit: Guccifer 2: From January to May, 2016

Within the small community conducting technical analysis of the DNC hack, there has been ongoing controversy over whether Guccifer 2 (G2) was a false flag for the Russians, whether G2 was located in the US rather than Russia, whether the G2 files were copied locally rather than hacked, whether G2 was a false flag for

2017-10-02 19:26   Click to comment

Climate Audit: Guccifer 2 and “Russian” Metadata

The DHS-FBI intel assessment of the DNC hack concluded with “high confidence” that Guccifer 2 was a Russian operations, but provided (literally) zero evidence in support of their attribution.  Ever since Guccifer 2’s surprise appearance on June 15, 2016 (one day after Crowdstrike’s announcement of the DNC hack by “Russia”), there has been a widespread

2017-09-23 20:35   Click to comment

Climate Audit: Guccifer 2 Email Time Zone

One of the major differences between Mr FOIA and Guccifer 2 is the latter’s use of email to correspond to journalists. G2 contacted Gawker and Smoking Gun on June 15, corresponding further with Smoking Gun on June 21 and June 27. He corresponded with Vocativ on July 4-5 and with the Hill on July 11

2017-09-19 20:59   Click to comment

Climate Audit: Time Zone of Guccifer 2 cf.7z

In a recent post, I observed that the majority of the emails in the Wikileaks DNC archive were sent AFTER Crowdstrike installed their anti-Russian software on May 6.  In today’s post, I’ll look at a metadata issue concerning Guccifer 2, who was, with “high confidence”, attributed by the US intel community to be Russian, supposedly

2017-09-18 17:44   Click to comment

Climate Audit: Email Dates in the Wikileaks DNC Archive

Yesterday, Scott Ritter published a savage and thorough critique of the role of Dmitri Alperovitch and Crowdstrike, who are uniquely responsible for the attribution of the DNC hack to Russia. Ritter calls it “one of the greatest cons in modern American history”.  Ritter’s article gives a fascinating account of an earlier questionable incident in which

2017-09-02 17:59   Click to comment

Climate Audit: Arctic Lake Sediments: Reply to JEG

Julien Emile-Geay (JEG) submitted a lengthy comment concluding with the tasteless observation that “Steve’s mental health issues are beyond PAGES’s scope. Perhaps the CA tip jar pay for some therapy?”  – the sort of insult that is far too characteristic of activist climate science.  JEG seems to have been in such a hurry to make this

2017-07-29 17:42   Click to comment

Climate Audit: PAGES 2017: Arctic Lake Sediments

Arctic lake sediment series have been an important component of recent multiproxy studies.  These series have been discussed on many occasions at Climate Audit (tag), mostly very critical.  PAGES 2017 (and related Werner et al 2017) made some interesting changes to the Arctic lake sediment inventory of PAGES 2013, which I’ll discuss today. Some prior

2017-07-22 19:58   Click to comment

Climate Audit: PAGES2017: New Cherry Pie

Rosanne D’Arrigo once explained to an astounded National Academy of Sciences panel that you had to pick cherries if you wanted to make cherry pie – a practice followed by D’Arrigo and Jacoby who, for their reconstructions, selected tree ring chronologies which went the “right” way and discarded those that went the wrong way –

2017-07-12 05:31   Click to comment

Climate Audit: Comey’s Mishandling of Classified Information

Recently, there has been controversy over allegations that former FBI Director Comey leaked classified information, an issue that I mentioned on twitter  a month ago. The recent news-cycle began with a story in The Hill,  leading to a tweet by Trump, followed by a series of sneering “rebuttals” in the media (CNN, Slate, Politico, Vanity Fair).

2017-07-11 22:29   Click to comment

Climate Audit: Does a new paper really reconcile instrumental and model-based climate sensitivity estimates?

A guest post by Nic Lewis A new paper in Science Advances by Cristian Proistosescu and Peter Huybers “Slow climate mode reconciles historical and model-based estimates of climate sensitivity” (hereafter PH17) claims that accounting for the decline in feedback strength over time that occurs in most CMIP5 coupled global climate models (GCMs), brings observationally-based climate

2017-07-08 11:49   Click to comment

Climate Audit: The effect of Atlantic internal variability on TCR estimation – an unfinished study

A guest article by Frank Bosse (posted by Nic Lewis) A recent paper by the authors Stolpe, Medhaug and Knutti (thereafter S. 17) deals with a longstanding question: By how much are the Global Mean Surface Temperatures (GMST) influenced by the internal variability of the Atlantic (AMV/AMO) and the Pacific (PMV/PDO/IPO)? The authors analyze the

2017-06-19 15:24   Click to comment

Climate Audit: How dependent are GISTEMP trends on the gridding radius used?

A guest post by Nic Lewis Introduction Global surface temperature (GMST) changes and trends derived from the standard GISTEMP[1] record over its full 1880-2016 length exceed those per the HadCRUT4.5 and NOAA4.0.1 records, by 4% and 7% respectively.  Part of these differences will be due to use of different land and (in the case of

2017-05-18 21:04   Click to comment

Climate Audit: Centenary of the End of the Battle of the Somme

November 18 marks the centenary of the end of the Battle of the Somme, an event that passed essentially unnoticed, though it was a seminal event in the development of modern Canada. Its carnage was over 1.1 million casualties from a combined population (both sides) of about 170 million. (For a scale, there have been approximately

2016-11-19 04:03   Click to comment

Climate Audit: The Destruction of Huma Abedin’s Emails on the Clinton Server and their Surprise Recovery

Despite extraordinarily intense coverage of all aspects of Hillary Clinton’s emails, all commentary to date (to my knowledge), even the underlying FBI Report, has paid little to no attention to the destruction of Huma Abedin’s emails, also stored on the Clinton server.  Further, even with the greatly increased interest in Huma’s emails arising from the discoveries

2016-11-04 19:08   Click to comment

Climate Audit: Was early onset industrial-era warming anthropogenic, as Abram et al. claim?

A guest post by Nic Lewis Introduction A recent PAGES 2k Consortium paper in Nature,[i] Abram et al., that claims human-induced, greenhouse gas driven warming commenced circa 180 years ago,[ii] has been attracting some attention. The study arrives at its start dates by using a change-point analysis method, SiZer, to assess when the most recent

2016-08-31 18:12   Click to comment


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