From Dr Roy Spencer’s Global Warming Blog
by Roy W. Spencer, Ph. D.
With the approaching El Nino superimposed upon a long-term warming trend, many high temperature records were established in September, 2023.
The Version 6 global average lower tropospheric temperature (LT) anomaly for September, 2023 was +0.90 deg. C departure from the 1991-2020 mean. This is above the August 2023 anomaly of +0.70 deg. C, and establishes a new monthly high temperature record since satellite temperature monitoring began in December, 1978.
The linear warming trend since January, 1979 still stands at +0.14 C/decade (+0.12 C/decade over the global-averaged oceans, and +0.19 C/decade over global-averaged land).
Regional High Temperature Records for September, 2023
From our global gridpoint dataset generated every month, there are 27 regional averages we routinely monitor. So many of these regions saw record high temperature anomaly values (departures from seasonal norms) in September, 2023 that it’s easier to just list all of the regions and show how September ranked out of the 538 month satellite record:
Globe: #1
Global land: #1
Global ocean: #1
N. Hemisphere: #2
N. Hemisphere land: #1
N. Hemisphere ocean: #4
S. Hemisphere: #1
S. Hemisphere land: #1
S. Hemisphere ocean: #1
Tropics: #6
Tropical land: #2
Tropical ocean: #8
N. Extratropics: #2
N. Extratropical land: #1
N. Extratropical ocean: #4
S. Extratropics: #1
S. Extratropical land: #1
S. Extratropical ocean: #1
Arctic: #11
Arctic land: 7th
Arctic ocean: 65th
Antarctic: 15th
Antarctic land: 26th
Antarctic ocean: 14th
USA48: 144th
USA49: 148th
Australia: 12th
The full UAH Global Temperature Report, along with the LT global gridpoint anomaly image for September, 2023 and a more detailed analysis by John Christy, should be available within the next several days here.
Lower troposphere:
http://vortex.nsstc.uah.edu/data/msu/v6.0/tlt/uahncdc_lt_6.0.txt
Middle troposphere:
http://vortex.nsstc.uah.edu/data/msu/v6.0/tmt/uahncdc_mt_6.0.txt
Tropopause:
http://vortex.nsstc.uah.edu/data/msu/v6.0/ttp/uahncdc_tp_6.0.txt
Lower Stratosphere:
http://vortex.nsstc.uah.edu/data/msu/v6.0/tls/uahncdc_ls_6.0.txt
