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From the blog: WuWt?

Watts Up With That?

UAH V5.5 Global Temp. Update for Sept. 2012: +0.34 deg. C

By Dr. Roy Spencer

As discussed in my post from yesterday, the spurious warming in Aqua AMSU channel 5 has resulted in the need for revisions to the UAH global lower tropospheric temperature (LT) product.

Rather than issuing an early release of Version 6, which has been in the works for about a year now, we decided to do something simpler: remove Aqua AMSU after a certain date, and replace it with the average of NOAA-15 and NOAA-18 AMSU data. Even though the two NOAA satellites have experienced diurnal drifts in their orbits, we have found that those drifts are in opposite directions and approximately cancel. (The drifts will be corrected for in Version 6.0).

The new interim dataset, Version 5.5, has a September, 2012 global lower tropospheric temperature anomaly of +0.34 deg. C (click for large version):

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