Mogelijk tikte Z1540 de 20C gem. grens aan ipv ‘slechts’ 18.9C gem.
https://en.wikipedia.org/wiki/1540_European_drought#Description
https://cp.copernicus.org/preprints/8/2695/2012/cpd-8-2695-2012.pdf
https://iopscience.iop.org/article/10.1088/1748-9326/11/11/114021
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