Search Results for: hockey

The Boulton Hockey Stick

Following (below left) is the Hockey Stick diagram endorsed by Geoffrey Boulton, General Secretary of the Royal Society of Edinburgh, in their December 2009 (post-Climategate) Policy Advice statement Climate Change and the U.N Copenhagen Summit here. On the right is a confirmation plot from data archived in late 2009 and February 2010 by Boulton’s associate […]

The Hockey Stick and the Milankovitch Theory

The 20th century warming counters a millennial-scale cooling trend which is consistent with long-term astronomical forcing. MBH99 According to the UMass researchers, the 1,000-year reconstruction reveals that temperatures dropped an average of 0.02 degrees Celsius per century prior to the 20th century. This trend is consistent with the “astronomical theory” of climate change, which considers […]

The "Climategate" Hockey Stick

If anyone’s keeping a tab on “climategate” hits, they have a very Hockey-Stick shaped pattern. A couple of days ago, someone observed that “climategate” hits on Google hit the 10 million mark. They’ve now hit 10.8 million. [Note: I got 94.5 million a couple of minutes ago. Dunno why I got a different answer when […]

Briffa on another Mann Hockey Stick

Like many other people, I’m gradually digesting the CRU letters. Obviously I’m going to comment on them but I’m going to start a little slowly. Here’s one that’s a little fun,

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 […]