September global surface TempLS unchanged from August.

As of today, it shows a fall of 0.002°C, but the sign of  that could easily change. The TempLS mesh anomaly (1961-90 base) was 0.682°C in September vs 0.684°C in August. The NCEP/NCAR index also showed virtually no change, while the UAH satellite TLT index declined (0.05°C).

The marked feature was a big rise in SST, balanced by a cooling on land, especially in N Canada. There was a band of warmth from NW Russia through Europe into Africa. Antarctica was cold. Here (from here) is the plot of relative contributions to the rise (ie components weighted by area). Note, as mentioned above, the strong effect of the SST rise on the global average:

Here is the temperature map. As always, there is a more detailed active sphere map here.

This post is part of a series that has now run since 2011. The TempLS mesh data is reported here, and the recent history of monthly readings is here. Unadjusted GHCN is normally used, but if you click the TempLS button there, it will show data with adjusted, and also with different integration methods. There is an interactive graph using 1981-2010 base period here which you can use to show different periods, or compare with other indices. There is a general guide to TempLS here.

The reporting cycle starts with a report of the daily reanalysis index on about the 4th of the month. The next post is this, the TempLS report, usually about the 8th. Then when the GISS result comes out, usually about the 15th, I discuss it and compare with TempLS. The TempLS graph uses a spherical harmonics to the TempLS mesh residuals; the residuals are displayed more directly using a triangular grid in a better resolved WebGL plot here.

A list of earlier monthly reports of each series in date order is here:

1. NCEP/NCAR Reanalysis report
2. TempLS report
3. GISS report and comparison with TempLS