Category Archives: Spot the Hockey Stick!

The Mann Hockey Stick is out there, disguised in news articles and serious scientific publications. Our aim is to find it.

Calibrating “Dr. Thompson’s Thermometer”

One of the most persuasive images in the global warming debate is a graph that Al Gore describes in his An Inconvenient Truth as “Dr. Thompson’s thermometer.” According to Gore, this graph is based on oxygen isotope ratios from ice cores collected by Lonnie Thompson and his colleagues, and provides “the most definitive” independent confirmation […]

Mike’s Nature trick

So far one of the most circulated e-mails from the CRU hack is the following from Phil Jones to the original hockey stick authors – Michael Mann, Raymond Bradley, and Malcolm Hughes.

Schakowsky: "a different source which our staff had confirmed with Al Gore"

Here is an interesting exchange at the House Energy and Commerce Subcommittee hearings about the provenance of the hockey stick diagram in An Inconvenient Truth. Thanks to the reader who spotted this. Rep Stearns took aim at the apparent use of Mann’s Hockey Stick in Inconvenient Truth (the methodology of which had been severely criticized […]

Al Gore and "Dr Thompson's Thermometer" #2

Yesterday, I posted up about “Dr Thompson’s Thermometer” and, thanks to CA readers, some interesting results emerged. A special thanks to Tim Lambert for spotting the provenance of Dr Thompson’s thermometer. The post today will repeat some of yesterday’s material, but will recast it, since we now understand the puzzle much better. In Inconvenient Truth, […]

Al Gore and Dr Thompson's Thermometer

Surprisingly, I don’t think that I’ve written previously about the Al Gore Hockey Stick. In Inconvenient Truth, after a segment discussing glaciers, Gore stands in front of a Hockey Stick graph for the last 1000 years and tells his audience that “Dr Thompson’s thermometer” had shown the inconsequentiality of the Medieval Warm Period and, [in […]

Spot the Hockey Stick #17: Lloyds of London

Following the discussion on insurers, RMS and climate change, someone pointed out that Lloyds of London also quotes a certain reconstruction of past temperatures. It wasn’t on the front page, but it wasn’t difficult to spot. From the document linked as “Adapt or Bust” but included as part of a document on “Catastrophe” as part […]

Lovelock and the Revenge of Gaia

From Webster’s dictionary Totem n 1. a natural object or an animate being, as an animal or bird, assumed as the emblem of a clan, family, or group. 2. an object or natural phenomenon with which a family or sib considers itself closely related. 3. a representation of such an object serving as the distinctive […]

Spot the Hockey Stick #15: NOAA and a reply to Jerry Pournelle

(John A): On Jerry Pournelle’s fascinating weblog, a poster has mentioned Steve McIntyre’s expanded horizons into the world of multiproxy studies and the revealing reply to the NAS Panel by D’Arrigo in praise of cherrypicking proxies because "that’s what you have to do if you want to make cherry pie". Jerry responds: The basis assumption […]

Spot the Hockey Stick #14: The BBC

Of all news outlets across the world, the supposedly unbiased BBC has been one of the greatest cheerleaders of global warming alarmism in general, and the Hockey Stick in particular. My encounters with the journalists who write on the BBC website have been brusque and condescending. As a mere taxpayer and license fee payer, I […]

Spot the Hockey Stick #13:

Sometimes the Mann Hockey Stick (1999) is eclipsed by another reconstruction which goes twice as far back and with even less statistical significance (if that’s possible) than the original. Yes, it’s the "Mann Hockey Stick mark deux" produced by Drs Jones and Mann to widespread indifference in 2003. Steve has tried replicating this one as […]


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