The Blackboard

Yesterday, Orin Kerr posted “Developing a Comment Culture:”, triggering a discussion of comment policies at law blogs. Readers at climate blogs will be familiar with the endless debates over comment policies in our own arena.
Some climate blogs are 100% moderated; some are barely moderated. SteveM’s “Zamboni Method” is applauded by a commenter at [...]

Being from Illinois, I feel compelled to post something outside my normal pattern: Former Governor Dead Meat was convicted in the impeachment proceedings. The AP story is here.
The verdict brought to an end what one lawmaker branded “the freak show” in Illinois. Over the past few weeks, Blagojevich found himself isolated, with almost the entire [...]

From time to time, I like to compare the GMST anomalies themselves to projections based on multi-model means. (Most of the time, I look at trends for a variety of reasons.)
Still, it’s always also useful to see temperature anomalies themselves. Now that The Climate Explorer has all but 1 model run driven by [...]

Over at Watts Up With That, Anthony, posted some observations by Michelle of of ReadNSay who comments on this quote by Hansen:
“The hardest part is trying to influence the nature of the measurements obtained, so that the key information can be obtained.”
Michelle suggests the following interpretation:
To me this sounds like spin for “The hardest part [...]

Zeke suggested the thread on You Can’t Make This Stuff Up! has gotten too long to load. That thread is not only an open thread, but odd theories on global warming are permitted.
I will be closing that thread, moving the most recent comments here, and letting this be the new thread. Yes… [...]

Are any of you wondering how the model-mean and multi-model mean trends from AOGCMs compared to observations? The main answer is: About as poorly than the trends from individual realizations discussed Tuesday.
Today, I will be discussing what we discover if we apply the sorts of paired-t tests discussed in section 4.2 of Santer et [...]

Are any of you wondering how the surface temperature trends from individual model runs compared to global mean surface temperature trends?
As many know, I’d started comparing IPCC projections to observations way back is… February? March? Early on, I compared data to the “about 2C/century” IPCC projection discussed in the AR4. Some criticized [...]

The thing about trolls…. is they are obnoxious.
Some of you will recall I wrote a first draft of a troll control plugin, which would display comments from trolls to the troll, but not others. However, I discovered that method used too much CPU when comment threads were long. So, I devised [...]

HadCrut has posted their December temperature anomaly here. It will not surprise climate blog addicts to learn the December 2008 surface temperature anomaly was cooler than the November anomaly.
Here are the anomalies for the past three months:

Month
Current Report
In Cache

Dec. 2008
0.307C
–

Nov. 2008
0.400C
0.387C

Oct. 2008
0.453C
0.438C

I’ll let you subtract.
Comparison to Cache
In total 11 months [...]

NOAA has reported their December 2008 anomaly for the world. It’s down:

November 2008: 0.6195 C
December 2008: 0.4821 C

I know NOAA US data came out much earlier this month, showing a drop in temperature. Evidently, their records indicate a worldwide drop.
NOAA has generally published after HadCrut. I’m still waiting for HadCrut. I’d like to do [...]