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by jfengel 1075 days ago
The raw data includes satellite measurements, which cover the entire globe. It's calibrated against ground-based weather stations.

The raw data is available at:

https://www.nsstc.uah.edu/data/msu/

Putting all that together into a single temperature requires a model. The error analysis of the model is on their web site. There's certainly more than enough data to justify four significant figures.

(The weird part: the authors of the report are both prominent climate change deniers. One says that the problems are real but not man-made; the other says that the problems are real and man-made but not actually a problem. They are the guys who run the satellite and integrate the data.)

https://www.nsstc.uah.edu/climate/2023/June/GTR_202306JUN_1....