The IPCC Climate Zone Map reported in Figure 3A.5.1 in Chapter 3 of Vol.4 of 2019 Refinement has been produced by authors applying the classification scheme, reported in Figure 3A.5.2, on the gridded Climate Research Unit (CRU) Time Series (TS) monthly climate data for the period from 1985 to 2015 -CRU4.00- following the methodology described by Harris et al. (in Harris, I., Jones, P. D., Osborn, T. J. & Lister, D. H. (2014) Updated High-resolution Grids of Monthly Climatic Observations - the CRU TS3.10 Dataset. International Journal of Climatology 34(3): 623-642).
