The Blackboard

Hadley is the final agency to report their June ‘09 temperature anomaly: 0.503C Comparing to previous temperature anomalies:

This is up 0.105C since May ’09’s anomalie of 0.398C. (In June, May’s anomaly was reported as 0.400C.)
This almost 0.2C higher than June ’08’s anomaly of 0.307C.
This the third hottest June anomaly, exceeded only by June 1998’s [...]

El Niño conditions are in and it looks like the HadSST’s temperature anomalies may finally break their all time high temperature anomalies. The June anomaly of 0.50 C is a big jump up from 0.355C for May:
It’s worth comparing the June anomaly of 0.50 C these to previous values:

May 2009: 0.355C.
June 2008: 0.251C
June 1998: 0.519C. [...]

UAH’s temperature anomaly sagged to 0.001C in June, drooping further relative to the 0.04C May value. Despite VG’s encouragement, the tempeature anomaly did not break through the zero barrier. Here’s a plot showing longer and shorter term trends, and highlighting June temperature readings.
My quick scan indicates VG may have posted the closest specific [...]

Deep Climate sure likes to come up with his own idiosyncratic methods of computing trends for the earth’s surface temperature!
In comment 12745, Deep introduced the notion that we could learn something by noticing that 20 year average trends have been increasing. I pointed out that I was aware they are increasing, but at [...]

In comments,Andrew_FL ask me to plot the trends since 1979 and the 20 year trends for HadCrut. I was going to wait until HadCrut updated…. but then I decided one month won’t make much difference. Here are the trends from 1979-”Year” for HadCrut, NOAA, GISSTemp compared to the trend based on 16 AOCGMs [...]

Some of you are aware that George Will made some statements about sea ice which were criticized as inaccurate. By the same token, the fact checkers at The Washington Post explained that, the claims passed a “fact check”.
How could this be? Let’s look.
What George Will actually said was this:
According to the University of Illinois’ [...]

GISS published their January 2009 anomaly: 0.52C, up from 0.46C in December 2008. (December 2008 is up from the previous entry of 0.45C. I circled both in red to highlight this change.)
So, the satellites and surface measurements are in general agreement so far: The temperature rose.
I sometimes try to write a [...]

Yesterday, I showed that the 108 year Hadcrut trend is greater than the GISSTemp trend. BarryW asked me to post a graph showing the differences, with a trendline superimposed. Doing that made me think, “Hmm…. what if I plot the differences between the mean-model global mean surface temperature (GMST) and the observed GMST?” [...]

In comments, people have been comparing trends from various reporting agencies. The discussions include various theories of why the different trends might differ. Are political statements are made? Yes. Are axes are being ground? Yes.
Still, no matter whose neck you wish to chop off with an axe, it’s worth looking at the trends themselves. [...]

The RSS Anomaly has been reported here. Though we have been freezing our rears in Chicago, the global temperature anomaly rose relative to December. Since much of the focus for tropospheric temperatures involves values since the satellites began, I computed the trend since 1979. (The graph only displays since 1980.)
Interestingly, January’s anomaly [...]