CLASSnmat v2

This is an update of the CLASSnmat dataset described in Cornes et al. (2020).
Climate Linked Atlantic Sector Science (CLASS)nmat is a global dataset of monthly mean night marine air temperature (NMAT) that is produced on a 5° latitude by 5° longitude regular grid. The dataset begins in 1880 and in contrast to the version on BADC (see link below), this dataset is updated on a more frequent basis.
The main different with v1 is that the height uncertainty is estimated via a 200-member ensemble of gridded temperature realizations. This and further changes are described in the attached readme file.