September 2008 Update on Global Temperature – UAH
Posted by The Diatribe Guy on September 11, 2008
A few days ago, UAH released their August anomaly.
The information is found here.
The August anomaly is -0.10 (in terms of a degree Celsius).
HISTORICAL COMPARISON OF THE SINGLE DATA POINT
*It is 0.0547 degrees colder than July 2008
*It is 0.296 degrees colder than August 2007
*It is the coldest August anomaly since 2000
*Warmer anomalies can be found as far back as September 1979 (0.27). The data starts December 1978.
*19th warmest (12 coldest) August anomaly out of 30 data points since 1979
*223rd warmest (135th coldest) anomaly out of the total 357 monthly observations
SLOPES AND CHANGES IN SLOPE
*Current running negative slope extends back to May 1997 (graph below)
*Overall slope since inception (December 1978) is 0.1072, equivalent to 1.29 degrees per Century. Graph below:
*Current 60-month slope = -0.3560, or a rate of 4.27 degrees cooling per Century. Chart below:
*This is the lowest 60-month slope since the period ending November 1994.
*The peak positive 60-month slope occurred in the period ending March 2004, and has declined since. The peak chart is below:
And the rate of decline since the peak is presented below:
The cyclical variations in 60-month slopes is shown below:
*120-month slope is 0.0816, which has actually increased and is at its highest level since April 2007. This is due to a dramatic fall in front-end period anomalies (as anomalies came down from the El Nino peak in 1997-98).
*180-month slope, at 0.1239 is the lowest since the period ending May 2002, but still positive
*240-month slope, at 0.1483 is the lowest since the period ending January 2007
*300-month slope, at 0.1482 is the lowest since the period ending August 2006
*It is the 12th consecutive monthly anomaly that is colder than the previous year’s reading.
*The last 12-month run is the period ending February 2000, which ended a 16 month run.
*Other runs of at least 12 months of cooling: 19 months, ending April 1993; 13 months ending October 1989; 13 months ending December 1984; 12 months ending December 1982.
*4-month average of -6.50 and the 5-month average of -4.90 are the coldest respective stretches since the period ending June 1997, and is colder than periods as far back as October 1979
*The 12-month anomaly of .0478 is the coldest annual stretch since the period ending December 2000, and is actually colder than the period ending June 1980 (.0499)
*The 60-month average of .2354 is the coldest since the period ending June 2005. There is no earlier period in the data set with a warmer average 5-year period.
*The 120-month average of .2033 is the coolest average since the period ending January 2006. There are no previous 10-year periods with higher averages.
GISS has released their data, and it reflects a similar drop in magnitude. The August anomaly of 39 (in terms of 0.01 degrees Celsius) compares to an anomaly of 56 for August 2007 and an anomaly of 50 for July 2008. I won’t get to that complete analysis today, but for the curious observer, that data is found here.