reads peatland area out of a MAgPIE gdx file
Arguments
- gdx
GDX file
- file
a file name the output should be written to using write.magpie
- level
Level of regional aggregation; "cell", "reg" (regional), "glo" (global), "regglo" (regional and global) or any aggregation level defined in superAggregateX. In addition "climate" for the 3 climate regions tropical, temperate and boreal is available.
- sum
sum over land types TRUE (default) or FALSE