Search Results for: hockey stick

Spot the Hockey Stick #n+…

The UNEP CLIMATE CHANGE SCIENCE COMPENDIUM 2009 on page 5 uses the following graph from Wikipedia (not the IPCC Fourth Assessment Report): CO2 concentration and mean global temperature during the past millennium. CO2 levels (blue line, lefthand axis) are given in parts per million, temperatures (red line, right-hand axis) in degrees Celsius. Source: Hanno 2009 […]

Spot the Hockey Stick #n

In a presentation on April 7, 2009, Steven Chu uses the Graybill strip-bark bristlecone chronology (aka the Mann hockey stick) in a presentation. See page 7 here. (h/t to reader Gene). The Chu graphic even uses Mann’s overlay of temperatures, opportunistically ending at the high point of 1998. I wonder how Chu does at identifying […]

Code: The Hockey Stick

%%%% Matlab version of Hockey Stick % %Mann, M. E., R. S. Bradley, and M. K. Hughes (1998), Global-scale %temperature patterns and climate forcing over the past six centuries, %Nature, 392, 779– 787. % %Mann, M. E., R. S. Bradley, and M. K. Hughes (1999), Northern %Hemisphere temperatures during the past millennium: Inferences, uncertainties, %and […]

David Holland on the Hockey Stick Affair

David Holland has a new and interesting article entiitled “Bias And Concealment In The IPCC Process: The “Hockey-Stick” Affair And Its Implications” in which the proprietor of this blog is mentioned on occasion.

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 […]

von Storch and Zorita blog on the Hockey Stick

At a Nature climate change blog, von Storch and Zorita write: In October 2004 we were lucky to publish in Science our critique of the hockey-stick’ reconstruction of the temperature of the last 1000 years. Now, two and half years later, it may be worth reviewing what has happened since then. The publication in 2004 […]

IPCC and the Al Gore Hockey Stick

Al Gore’s hockey stick version (page 65 of the book “An Inconvenient Truth“) is taken from one of the many conflicting versions of Lonnie Thompson’s ice core data. Now there is an ongoing controversy about whether Thompson’s data is a temperature or precipitation proxy, with pretty much every other scientist except Thompson now viewing the […]

SPM4 Preview: The Hockey Stick Lives

Andrew Weaver in an article here says of the SPM: “This isn’t a smoking gun; climate is a batallion of intergalactic smoking missiles.” Wow. Even better than Space Invaders. There was a big front page preview of the SPM in the Toronto Globe and Mail today here all of which is worth reading, but for […]

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 […]

Making Hockey Sticks the Jones Way

I discussed Fisher’s Greenland dO!8 proxy yesterday and thought that it would be interesting to discuss its particular function in hockey stick manufacture in Jones et al 1998. Each hockey stick is, after all, made by a master craftsman. The Greenland dO18 is one of only 10 series in Jones et al 1998. Let’s see […]