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Saturday, March 13, 2010

Absolute RSS MSU TLT Data

I’ve moved to WordPress.  This post can now be found at Absolute RSS MSU TLT Data
If you haven’t noticed, KNMI has added RSS MSU TLT data to their Climate Explorer:

In absolute form, the Global TLT data of course includes seasonal variations, as shown in Figure 1.

Figure 1

And for those who are interested in things like these, Figure 2 shows the Annual Global TLT Minimums, Maximums, and Means and their trends. The linear trend of the annual maximums is higher than the minimums. And curiously, the trends for the annual means and minimums are the same.

Figure 2

And there’s always Global TLT anomalies and linear trend, Figure 3.

Figure 3

At present, the RSS TLT data at KNMI is lagging a few months.


Anonymous said...


I don't know how to duplicate the data for Figures 1 and 2 so I can't check this.
The slopes of the satellite data are almost entirely caused by the jump raise in temperatures after the 1998 El Nino. The slopes before the El Nino (taken from Jan 1979 to Sept 1997 - the 6th month after ONI first = 0.5 ) are much less that the overall slope. Matter of fact the Annual Min temperatures appear to fall during this time and the Annual Max and Mean look to be slightly +ve. Putting in straight trend lines obscures this interesting and perhaps important observation. This result is quite different from the land based temps based on GISS, NCDC, Hadcrut or whatever.

It will be interesting to see what happens in the next decade.

Bob Tisdale said...

Anonymous: You wrote, "The slopes of the satellite data are almost entirely caused by the jump raise in temperatures after the 1998 El Nino."

The early period is also biased downward by the volcanic eruptions in 1982 and 1991. And there's also a smaller upward step change from the 1986/87/88 El Nino, not as large as the one from the 1997/98 El Nino, but it's there.


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