Tuesday, July 3, 2018

June NCEP/NCAR global surface anomaly down by 0.078°C from May

In the Moyhu NCEP/NCAR index, the monthly reanalysis anomaly average fell from 0.287°C in May to 0.209°C in June, 2018. That follows a similar fall last month, and makes June now the coldest month since July 2015. In the lower troposphere, UAH rose 0.03°C.

It was warm in most of N America, but cold in Quebec and Greenland. Moderate to cool just about everywhere else, including the poles. Active map here.

The BoM still says that ENSO is neutral, but with chance of El Niño in the (SH) spring.

Arctic sea ice is a bit confused for now. Jaxa has been off the air for nearly two weeks, said to be computer issues, but NSIDC is also odd. Much discussion at Neven's of satellite troubles.
Update: No sooner said than JAXA has come back on. Nothing much to report; 2018 is not far behind, but quite a few recent years are ahead. NSIDC reported a big day melt, which might have been a catch-up.

This post is part of a series that has now run for some years. The NCEP/NCAR integrated average is posted daily here, along with monthly averages, including current month, and graph. When the last day of the month has data (usually about the 3rd) I write this post.
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

1 comment:

  1. Era-interim by Copernicus Climate Change service is a little bit different. The June anomaly is only down by 0.02 C from May, and the second warmest June on record.