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remark on large domains

Merged remark on large domains
master-patch-8e18 into master
Merged Lukas Kugler requested to merge master-patch-8e18 into master
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WRF/WRF_basic.md
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@@ -306,4 +306,6 @@ Variables are then accessible as `wrf.u`, `wrf.v` etc.
@@ -306,4 +306,6 @@ Variables are then accessible as `wrf.u`, `wrf.v` etc.
### Important namelist settings
### Important namelist settings
#### Input/output format for large domains
 
For domain sizes larger than about 2300x2300x100, it is necessary that `io_form_input` and `io_form_history` are identical.
 
Option 11 requires the pnetcdf library to be installed and linked with WRF. With option 102, each process writes its own file. Thus, a joiner program is required that combines all files into one file per timestep.