Regional definitions for HTAP3 Fires multi-model project: file on original emissions grid

This NetCDF file contains the definitions of the 8 source regions used for the HTAP3-Fires multi-model emission perturbation experiments. The mask file is at 0.1 deg resolution and on the same grid at the GFAS4HTAP biomass burning emissions. There is one variable per source region, with values of 1 where the region is defined, and 0 elsewhere. The regions are based on merged GFED regional definitions (e.g., https://www.globalfiredata.org/data.html), and chosen based on this publication: https://gmd.copernicus.org/articles/18/3265/2025/