Blog Profile / Climate Audit

Filed Under:Issues & Causes / Climate Change
Posts on Regator:506
Posts / Week:1.4
Archived Since:December 20, 2008

Blog Post Archive

Picking Cherries in the Gulf of Alaska

The bias arising from ex post selection of sites for regional tree ring chronologies has been a long standing issue at Climate Audit, especially in connection with Briffa’s chronologies for Yamal and Polar Urals (see tag.)  I discussed it most recently in connection with the Central Northwest Territories (CNWT) regional chronology of D’Arrigo et al […]

Cherry-Picking by D’Arrigo

One of the longest standing Climate Audit issues with paleoclimate reconstructions is ex post decisions on inclusion/exclusion of data, of which ex post decisions on inclusion/exclusion of sites/data in “regional [treering] chronologies” is one important family. Show More Summary

Marvel et al.: Implications of forcing efficacies for climate sensitivity estimates – update

A guest article by Nicholas Lewis Introduction In a recent article I discussed the December 2015 Marvel et al.[1] paper, which contends that estimates of the transient climate response (TCR) and equilibrium climate sensitivity (ECS) derived from recent observations of changes in global mean surface temperature (GMST) are biased low. Marvel et al. reached this […]

Bob Carter

I was very saddened to learn of the sudden death of Bob Carter ( here here).   He was one of the few people in this field that I regarded as a friend.  He was only a few years older than me and we got along well personally. I will not attempt to comment on […]

Appraising Marvel et al.: Implications of forcing efficacies for climate sensitivity estimates

A guest article by Nicholas Lewis Note: This is a long article: a summary is available here. Introduction In a recent paper[1], NASA scientists led by Kate Marvel and Gavin Schmidt derive the global mean surface temperature (GMST) response of the GISS-E2-R climate model to different types of forcing. They do this by simulations over […]

Update of Model-Observation Comparisons

The strong El Nino has obviously caused great excitement in the warmist community.  It should also cause any honest skeptic/lukewarmer to re-examine whether observations remain inconsistent with models. In today’s post, I’ll show two comparisons: 1) CMIP5 models (TAS) vs HadCRUT4; 2) CMIP5 models (TLT) vs RSS (UAH is only negligibly different).  For this post, […]

COP21 Emission Projections

In the wake of COP21, I thought that it would be interesting to compare the respective pathways of China and the U.S (and others) based on official data. I still plan to post on this topic, but obtaining official data on the pathways proved much more difficult than I anticipated.  Leading into the COP21 conference […]

Balascio et al and the Baffin Island Inconsistency

There was some publicity this week on a paper by Young et al (Science Advances, 2015), which, according to Gifford Miller, whose work has been frequently discussed at CA (see  tag), had supposedly put the “coup de grace on the Medieval Warm Period”, that had been so long wished for by the Team.   […]

What “Science” is “Telling Us” About Climate Damages to Canada

Just before leaving for Paris, the Canadian government, like many others,  stated that “science” was “telling us” that climate change was “one of the greatest threats of our time”. The scientific evidence is clear: climate change is one of the greatest threats of our time. The Government of Canada recognizes that global temperature increases must be […]

Antarctic Ice Mass Controversies

Like many others, I was interested in the recent controversy arising from findings of Zwally et al 2015 that there had been ice mass gain gain of ~112±61 Gt/year over 1992-2001 and ~82±25 Gt/year over 2003-2008.  Zwally’s findings obviously contradict a widely held contrary belief, expressed, for example, in IPCC AR5’s assertion there was “high confidence” that the […]

Shukla’s Gold

Roger Pielke Jr recently made the remarkable discovery that, in addition to his university salary from George Mason University (reported by Pielke as $250,000), Jagadish Shukla, the leader of the #RICO20, together with his wife, hadShow More Summary

Disinformation from Barry Klinger and the RICO 20

The RICO-20 gang of climate scientists commenced its supposed campaign against misinformation with false information about skeptic reactions to the Cuccinelli investigation. Barry Klinger, one of Shukla’s hangers-on at George Mason University,...Show More Summary

The “Blade” of Ocean2K

I’ve had a longstanding interest in high-resolution ocean proxies (with posts as early as 2005 – see Ocean Sediment tag) and had already written detailed reviews of many of the individual high-resolution series used in Ocean2K (e.g. here here here here here here). In these prior discussions, the divergence between the 20th century proxy data and 20th century instrumental […]

The Ocean2K “Hockey Stick”

The long-awaited (and long overdue) PAGES2K synthesis of 57 high-resolution ocean sediment series (OCEAN2K) was published a couple of weeks ago (see here here). Co-author Michael Evans’ announcement made the results sound like the latest and perhaps most dramatic Hockey Stick yet: Today, the Earth is warming about 20 times faster than it cooled during the past 1,800 […]

Op Ed on Deflategate

In Financial Post here. My submitted version was a little harsher. #deflategate For related blog posts, see tag here.

Did McNally Inflate One Football in the Washroom?

In today’s post,  I’m going to show the Deflategate data from a new perspective.   Rather than arguing about whether the Patriots used the Logo gauge, I’ve assumed, for the sake of argument, the NFL’s conclusion that the Non-Logo gauge was used, but gone further (as they ought to have done). I’ve “guessed” the amount of […]

Letter to Daniel Marlow on Exponent Error

On June 29, I sent a letter to Ted Wells, notifying him of the erroneous description of key figures in the Exponent report, but did not receive any acknowledgement.  In the presumption that Daniel Marlow of Princeton is more likely to be concerned about the erroneous research record (as well as having obligations that the […]

Exponent’s Trick to Exaggerate the Decline

In an earlier article,  I pointed out that essential figures in the Exponent report contained (what appeared to be) an important misrepresentation: that transients purporting to represent Logo gauge initialization had not really been initialized with the Logo gauge. Show More Summary

Who “Told” Exponent Not to Consider Switching Scenario?

The transcript of the Brady appeal before Goodell has been released and it’s astonishing to see how the sausage was made.  It raises many issues, one of which I’ll discuss in today’s post. In my previous commentary on the case, I’ve drawn attention to the fact that NFL officials at half-time, despite heightened scrutiny, inadvertently […]

Goodell and Deflategate Science

Yesterday, Roger Goodell released his decision on the Brady appeal. Most of the early discussion has been about Brady’s destruction of his cell phone. Brady has contested the NFL’s characterization of this incident here (see cover here), saying that he had replaced a broken phone; that they had already told the NFL that Brady was not going to […]

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