Dec 18 2007
Compare and Contrast: NCEP, GISS Temperatures
Yesterday I was messing around with the NCEP/NCAR Reanalysis and decided to plot the time series of the global mean temperature. This can be seen below in black. I then ploted the GISS temperature, in purple(?).
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As can easily be seen, the temperatures from 1948 through 1980 track each other very well. However, at this point they start diverging. The temperature calculated by GISS rises at a higher rate than that from NCEP. I haven’t done any statistical tests on the rate of increase in temperature.
Which of the two temperature trends is correct?
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