Today, I’m posting up plots comparing the MSU gridded data and the NOAA land-sea gridded data. On an overall basis, MSU (GLB) is running about 0.2 deg C cooler than NOAA land-sea gridded in October 2008. These differences are quite volatile and this discrepancy is not unusual.
First here is October MSU (centered on 1980-2000) to facilitate comparison with the NOAA land-sea version (which I’ve also centered on 1980-2000.)
Next here is October NOAA land-sea (re-centered on 1980-2000).
While the major patterns are similar in both data sets, there are some intriguing differences. NOAA surface coverage of the Southern Hemisphere looks decidedly scrappy beside UAH. While both NOAA and UAH show a cool “ridge” in the ocean offshore western Europe, it’s much larger in the UAH version. The tropical Pacific and northern Pacific are cooler in UAH. But it’s not all the same direction – UAH western Canada is warmer than NOAA western Canada.