Climate Sanity

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Tree-rings: Proxies for Temperature or CO2?

Feb 15, 2010 5:32pm

This step begs the question (in the classical logical sense) about the usefulness of tree-rings as proxies for temperature. Surely tree-ring width is not solely dependent on temperature, is it? What about drought conditions? Usually we think of droughts as coinciding with high temperatures. Would higher temperatures...

Amazing multiplying hockey stick proxies

Feb 2, 2010 10:31pm

This short list of predictors are the "Amazing Multiplying Hockey Stick Proxies." These 10 predictors are multiplied into 71 proxies, and these proxies all rank high for correlation to the instrumental temperature record from 1850 to the present. Consequently, these 71 "proxies" likely weigh heavily in Mann's 2008...

Super-simple hockey stick explanation.

Jan 31, 2010 5:14pm

I have been reading over the blog posts of Steve McIntryre and Jeff Id and others about the nuances of various constructions of the hockey stick. I’ve been examining the archived Mann08 data at the NCDC. This is my attempt to boil down hockey stick construction to its bare-bones, expressed as five essential steps: Step...

Mann’s 1209 temperature proxies

Jan 20, 2010 10:40pm

I believe that data used temperature reconstructions, which are in turn used to push for re-structuring the economy of the world, should be easily accessible to everybody. You can view the plots of all 1,209 proxies used by Michael Mann for his 2008 hocky stick temperature reconstruction joined together into one...

No Wikipedia

Jan 9, 2010 12:56pm

Wikipedia brags that "Anyone can be a Wikipedian—including you. Just click the edit link at the top of any page, or one of the ones at the beginning of each section." Sounds good, Wikipedia has empowered you, right? But they have also empowered everybody else: those with an...

Funny Cap and Trade advice for President Obama from the NYP

Jan 3, 2010 3:56pm

Mr. President, why not deal with global warming with a nice interfaith prayer summit? You can invite every Imam and Buddhist monk you know......

Mohib Ebrahim’s Climategate poster at NREL

Dec 31, 2009 8:51pm

I downloaded the large version of Mohib Ebrahim's very nicely made climategate timeline from Jo Nova's blog. This poster is now hanging on the wall of my office cubicle at the National Renewable Energy Laboratory. It will be interesting to see how this goes over with my colleagues....

William Connolley – Thoughtcop

Dec 20, 2009 7:16pm

Wikipedia Arbitration Committee revoked Mr. Connolley’s administrator status after finding that he misused his administrative privileges while involved in a dispute unrelated to climate warming. Really? What did he do that was worse than attempting to re-write the history of the planet in a way to affect decisions about the economy...

Michael Mann averaging error demo

Dec 13, 2009 9:44pm

This may be beating a dead horse, but I thought it would be fun to examine the question of data centering, or mean subtraction, for principal component analysis (PCA). So, I created a program that does a side by side comparison of PCA on simple noise with proper...

Kevin Trenberth’s REAL travesty

Nov 24, 2009 7:23pm

There has been a lot of talk about Kevin Trenberth's "travesty" email. Here is the REAL travesty: Trenberth has selected and presented data in a way that makes the epithet "alarmist" an objective evaluation of his behavior....