The Blackboard

The GISSTemp for November 2009 has been posted. The November 2009 anomaly exceeds the current October 2009 anomaly of 0.64C, and also exceeds the October 2009 anomaly of 0.67C published last month.
Because a blog visitor wanted to know whether the nomimal IPCC Trend of 0.2C/decade still fell outside the ±95% uncertainty intervals, I’ve [...]

GISS published the land/ocean anomaly for October 2009: 0.66C. This equals their anomaly for September. That is, it matches the value for September as published in November. The September anomaly in the Google cache is 0.65C. (I was wondering if this would change much given Hadley’s reticence in processing September data. A change of [...]

As many of you are aware, I am addicted to watching the monthly temperatures update. I was a bit surprised when “Change Detection” alerted me to a change of the GISS SST page. It seemed a bit early for November’s temperatures to appear. Still I visited the land/ocean temperature page. Sure enough, it [...]

GISS posted September’s temperature anomaly: 0.65 C. It was toasty! In fact, this September GISS temp exceeded the September 1998 value– but it does not exceed September 2005, which clocked in at 0.67C. Here are all the anomalies for months this years, in 100th of C:

2009
53
43
46
46
55
65
62

52
65

Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep

I’d say more.. but you know, I gotta’ [...]

All the surface temperature anomalies are in for August 2009. Trends since 1990 and 2001 are shown below and compared to the multi-model mean trend from the AR4:
As many are aware, both Hadley and NOAA reported August anomalies exceeded July anomalies. Specifically:

Hadley reported 0.532C up from 0.499 in July. NOAA reported [...]

Like UAH, GISSTemp dropped in August. I was expecting an El Nino rise. Here’s the graph with trends since 1990 and 2001:
Other details:

We’re still waiting for El Nino to finally push the trend since 2001 into positive territory; it remains just barely negative at 0.1C/century. The trend since 1990 is [...]

Nylo observed something I did not notice:

With this new GISTEMP data release, lots of changes have occurred. There is a generalised warming of the past (until about 1940) and a generalised cooling of the last decade. In total, 91 past monthly records have warmed (most from long ago), and 39 past monthly records have [...]

GISS reported the April anomaly: 44/100 C. That’s down from 49/100 C in March 2009. The blizzards in Utah, my slow-to-start spring garden and all the grousing about spring taking a long time to get here did register on the world’s thermometers. That said, April 2008 with its anomaly of 43/100ths [...]

GISS reported their land/ocean temperature anomaly for March 2009. The GISSTemp March anomaly was 0.47 C, up from 0.41C in February. Than may be spun all sorts of ways: For examples, it’s lower than March ‘08 value of 0.68 C, but higher than March ‘00 0.46C and of course, it’s higher than every [...]

GISSTemp posted their surface temperature anomaly for Jan 2009 here. The temperature anomaly dropped from 0.51 C to 0.41 C. Comparison to the cache showed relatively few changes in recent historic temperatures. Because I picked Jan 2001 as the start date for most my analyses, worth nothing the trend since January [...]