Roy Spencer's recent post comparing climate model predictions to observations has been providing lots of entertainment in recent days - I really should have posted a link before. David Appell is unamused by Roy's thoughts though, and has taken him to task,declaring his blog post "unprofessional". He also has an interesting point to make about Roy's UAH temperature record:
But then there is this: the linear trend for the entirety of the two datasets on middle tropospheric temperatures in the tropics is
RSS MT 20S-20N: 0.090 ± 0.028 °C/decadeUAH MT 20S-20N: 0.030 ± 0.028 °C/decade
That's right -- their trends differ by a factor of three, with UAH by far the lowest -- a fact which is neatly hidden away in Spencer's graph by taking their average.
Just as well Roy didn't come up with a trend of zero eh?