Saturday, August 15, 2020

GISS July global down by 0.03°C from June.

The GISS V4 land/ocean temperature anomaly was 0.89°C in July 2020, down from 0.92°C in June. That compares with a 0.039deg;C fall in the TempLS V4 mesh index. As with TempLS, Gistemp still had July tied with 2019 as the warmest July in the record. Jim Hansen's report is here.

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

Tuesday, August 4, 2020

July global surface TempLS down 0.039°C from June.

The TempLS mesh anomaly (1961-90 base) was 0.75deg;C in July vs 0.789°C in June. This drop was less than the fall in the NCEP/NCAR reanalysis base index, which was 0.1°C. The UAH satellite data for the lower troposphere showed a small rise of 0.01°C.

Rather surprisingly, despite now three successive and substantial monthly falls, July 2020 was still the second warmest July in the record, not far behind 2019 (0.824°C).

Although I noted doubts about NCEP/NCAR's recent results, the pattern of anomalies was qualitatively similar to that of TempLS. Cool in a band extending N from India to the Arctic, and in N China/Japan. Cool in Argentina and S Atlantic, Scandinavia and in Alaska. Warm in Antarctica and E Canada/NE USA, and also around the Mediterranean, and in a band from Iraq through W Russia.

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

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

Monday, August 3, 2020

NCEP/NCAR reanalysis July 2020 surface temperature down 0.01°C from June.

The Moyhu NCEP/NCAR index came in at 0.214°C in July, following 0.214°C in June, on a 1994-2013 anomaly base. June was well down on earlier months, so that makes a fairly cool period. I should mention that Karsten Haustein has commented that NCEP/NCAR seems to have gone off the rails. Certainly the recent cooling is more extreme than in other indices.

The main difference this month was that the heat seems to have gone from Siberia; most of Asia was cool, as was Northern Europe. A lot of Antarctica was relatively, but the South Atlantic was cold.

In blog housekeeping, I should warn that I have been intermittently restricting comments. This is because of a very persistent and annoying spammer. I hope it won't last too long, although I fear Google is not maintaining Blogger as enthusiastically as it once did.