DrRoySpencer.com:
UAH Global Temperature Update for September, 2023: +0.90 deg. C
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).
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Roy Spencer, aka, “the Official Climatologist of the Rush Limbaugh Program”, has long been a favorite go-to for climate deniers. He’s a former NASA scientist, who administers the satellite temperature data base at the University of Alabama – Huntsville, (known as UAH), one of the commonly cited temperature data sets.
Generally, the UAH shows less warming than the other data sets, such as NASA GISS.
There are a number of reasons for this, that I went through in a video several years ago, still worth a watch, below:
Spencer has been sort of a soft denier for many years. In the 90s, he and collaborator John Christy worked out their data to show, erroneously, that the world was cooling. Later they backtracked, and said, OK, it’s warming, but not very fast, so don’t worry.
This month, however, the UAH is showing, like every other dataset, an enormous spike.
I interviewed both a coral reef and a Greenland glacier asking what they thought of Roy Spencer, and their response would make a sailor blush.