Abstract
A previous paper of the author introduced a graphical method, allowing anyone interested to form one’s own opinion on data published in the form of computer-maps to re-compute the map data by means of a simple and efficient use of commonly available computer-graphic products. This was shown to allow a data re-analysis of sound metrological quality—there applied to a NASA video concerning the ice coverage on the Earth’s surface. In the present paper, the same procedure shows an efficient way to (re-)compute the annual value of the so-called Global Mean Surface Temperature (GMST)—a parameter normally provided by dedicated International Organizations, such as the ONU-supported IPCC—from whole-Earth maps of different types, often obtaining different results. A cartographic reason for this is given and discussed, explaining the differences found, some of which might have remained implicit in the published information.
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Dataset: F. Pavese (2022–23). Author Archives. Available, on request to the Author.
Notes
No information was found in the available literature regarding this aspect of the GMST computation process.
The indicated tolerance is only related to the dispersion, not to the accuracy of the temperature values.
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Communicated by H. Babaie
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Pavese, F. The choice of cartographic system on the calculation of Earth's surface parameters from maps, namely of the GMST. Earth Sci Inform 16, 4235–4241 (2023). https://doi.org/10.1007/s12145-023-01061-0
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DOI: https://doi.org/10.1007/s12145-023-01061-0