GISS September global up by 0.13°C from August.

The GISS V4 land/ocean temperature anomaly was 1.0°C in September 2020, up from 0.87°C in August. That compares with a 0.095deg;C rise (now 0.115°C) in the TempLS V4 mesh index. As with TempLS, it was the warmest September in the record.

As usual here, I will compare the GISS and earlier TempLS plots below the jump.

September global surface TempLS up 0.095°C from August.

The TempLS mesh anomaly (1961-90 base) was 0.837deg;C in September vs 0.742°C in August. This rise was less than the rise in the NCEP/NCAR reanalysis base index, which was 0.203°C. The UAH satellite data for the lower troposphere also rose more, by 0.14°C.

It was the warmest September in the TempLS record; next was 2016 at 0.781°C.

Again N Siberia and the adjacent Arctic Ocean was very warm. There was also warmth in the Near East, including E Mediterranean, and in Antarctica. There was a cool region in Central Asia; N America was split between a warm West and cool central and East. S America was warm.

Here is the temperature map, using the LOESS-based map of anomalies.


As always, the 3D globe map gives better detail.

NCEP/NCAR reanalysis September 2020 global surface temperature up 0.203°C from August.

 

The Moyhu NCEP/NCAR index came in at 0.35°C in September, following 0.147°C in August, on a 1994-2013 anomaly base. The rise was enough to counter recent monthly falls, making it the warmest month since April. The temperature was fairly even during the month, with no major spikes.

The main warm regions were Siberia and the adjacent Arctic and most of Europe except the Atlantic seaboard. Greenland was cold, and much of N America except the Pacific coast. The main other cool region was the Eastern Pacific. The Antarctic was mixed.