Study: model in good agreement with satellite temperature data – suggest cooling


Craig Loehle
National Council for Air and Stream Improvement, Inc.
Reprint available from NCASI (PDF)


Global satellite data is analyzed for temperature trends for the period January 1979 through June 2009.  Beginning and ending segments show a cooling trend, while the middle segment evinces a warming trend.  The past 12 to 13 years show cooling using both satellite  data sets, with lower confidence limits that do not exclude a negative trend until 16 to 22 years.  It is shown that several published studies have predicted cooling in this time frame.  One of these models is extrapolated from its 2000 calibration end date and shows a good match to the satellite data, with a projection of continued cooling for several more decades.

Figure 6.     Linear plus period model from Klyashtorin and Lyubushin (2003) overlaid on satellite data after intercept shift.  Dotted line is model extrapolation post-2000 calibration period end. a) UAH.  b) RSS.

a - UAH data plus model
Figure 6a – UAH data plus model