Digital Diatribes

A presentation of data on climate and other stuff

February 2009 Update on Global Temperature – GISS

Posted by The Diatribe Guy on February 25, 2009

I didn’t look at GISS last month, so here’s a quick update for the January month-end numbers:

Overall Trend

The overall trend since January 1880 has a slope of 0.047, which corresponds to warming of 0.564 degrees Celsius per Century.

Overall Trend

The furthest back we can go to see a flat or cooling trend is January 2001, 8 years and a month.

The stats:

  1. The anomaly for January was 52, which was actually not as large a jump as the satellite data showed. 
  2. The historical rank of that anomaly, though, still shows it to be the 5th warmest January on record and the 62nd highest anomaly out of 1,549.
  3. This is the fifth consecutive year-over year warmer anomaly

 
The rest of the charts show the various slope change charts, which shows how the various slopes have changed since the last peak.

The 60-month slope values have trended down since early 2004, with some cyclical fluctuations on the way. The current slope value of -0.1147 represents 1.37 degrees cooling per century. After a small bounce, this latest value reversed a bit.

The 120-month slope values have trended down overall since early 2002. The current slope value of +0.1535 represents 1.84 degrees warming per century. This is a slight decrease from previous, but in the range where it's been holding for a few months. It is anticipated that this will decline later this year as some low front-end anomalies fall off.

The 180-month slope values have trended down since 2007. The current slope value of +0.1489 represents 1.79 degrees warming per century. This has declined continuosly in that time and is at its lowest value since the period ending December 2002.

The 240-month slope values have generally trended down overall since early 2004. The current slope value of +0.1554 represents 1.86 degrees warming per century. The most recent slope vlaues have dropped quickly after a period of level slopes for over a year.

The 300-month slope values have trended down overall since early 2007, though the trend over the last year or so is actually positive. The current slope value of +0.1579 represents 1.89 degrees warming per century. Other than a dip in mid-2008, the slope level has hoverred around the 0.158 mark since October 2007.

The 360-month slope values have trended down overall since 2005. The current slope value of +0.1339 represents 1.61 degrees warming per century. This has declined steadily for over a year and is now at the lowest value since the period ending September 2002.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

 
%d bloggers like this: