October 2008 Update on Global Temperature – RSS
Posted by The Diatribe Guy on October 7, 2008
The RSS anomaly was released yesterday, and in reviewing the data, I decided that I won’t produce all the normal charts on this, because it really mirrors the UAH data trends quite well. I’ll still run down the stats I check below, but I’ll save you some bandwidth my now producing all the charts.
However, given that it mirrors UAH, I produced those charts here, so feel free to check those out.
Now, lest you be disappointed, I am currently working on an expanded spreadsheet for RSS that will produce trend charts by global latitudinal regions. The RSS data has a nice breakdown of the different regions and rather than just regurgitate the global anomaly that I already look at for UAH, I thought it would be more interesting to take a more refined look at RSS. I’m hoping to revisit that soon, as time allows. I’m also nearing completion on an analysis that demonstrates how temperature corresponds to solar activity and cycle lengths, which I think will be very interesting to many readers.
So, for those who still need your fix of the RSS data observations, here you go. Don’t worry, I at least still provided the overall charts and the current cooling trend chart:
The information is found here.
The September anomaly is 21.1 (in terms of 0.01 degree Celsius – the data in the link is in terms of degrees Celsius.).
HISTORICAL COMPARISON OF THE SINGLE DATA POINT
*It is 0.053 degrees cooler than September 2007
*It is 0.065 degrees warmer than August 2008
*It is the 13th warmest September anomaly (18th coolest) of all Septembers in the data set
*It is the 103rd warmest (255th coolest) anomaly in the total of 358 observations
*It is the highest anomaly since October 2007
*The latest 12-month average is now 8.2, which continues a decline in this measure.
*The 12-month average is the lowest since the period ending December 2000.
*This is the 13th consecutive year over year decrease in the anomaly reading
*The last such consecutive cooling streak was the period ending February 2000 (which ended a 15-month cooling stretch).
*Other streaks of 13 or more months in the data include: October 1991 – April 1993 (19 consecutive months); December 1983 – December 1984 (13 consecutive months). If the next anomaly is lower than previous year, this will be the third longest stretch in this data’s history (which starts January 1979).
SLOPES AND CHANGES IN SLOPE
*Overall trend line since inception is presented below. This represents warming of 1.69 degrees per Century. The history of this data only goes back to January 1979.
*Current running negative slope extends back to March 1997, or 138 months (graph below)
*The current cooling trend line added one data point with the new month, but did not extend the initial starting point back any further
*Current 60-month slope is -0.3922, about the same as last month (slight tick up) after 12 previous consecutive declines.
*Current running 120-month slope is 0.0805
*This slope value has increased for 8 consecutive months. While there is a longer-term decline since March 2002, this is the chart where the 1998 El Nino shows its major impact.
*The slope value is the highest since February 2007
*180-month slope is 0.0991, continuing to decrease as time goes on.
*Lowest value since the period ending August 1995
*240-month slope is currently at 0.1686
*This has bounced around in a generally flat pattern for a few months
*300-month trend is at 0.1734
*The same observed pattern in the last few anomalies is seen here as in the 240-month slopes
Keep an eye out for a follow-up post on RSS. I don’t have an ETA at the moment, but I’m hoping to get to it soon.