F-Colby-UML
New member
Initializing a regional run using GEFS ensemble members requires running ungrib on two separate input files, which are designated as A and B from the Amazon Cloud. For the WRF model, this is straightforward. You run ungrib separately on each set, then merge them in metgrid.
The B files have data at more levels than the A files have data at mandatory levels only (1000, 925, 850, ....). But the B files have only 3 soil levels and do not have a surface pressure value. This last limitation does not allow the WRF to initialize. Blending the A and B files provides enough data to initialize the WRF.
How do I do this for MPAS? The tutorial only shows how to add SST data to a regional initialization. I can run init_atmosphere on the B files first, but if I run init_atmosphere a second time on the A files, how do I ensure that the output will be merged instead of overwritten?
Thanks,
Frank Colby
UMass-Lowell
The B files have data at more levels than the A files have data at mandatory levels only (1000, 925, 850, ....). But the B files have only 3 soil levels and do not have a surface pressure value. This last limitation does not allow the WRF to initialize. Blending the A and B files provides enough data to initialize the WRF.
How do I do this for MPAS? The tutorial only shows how to add SST data to a regional initialization. I can run init_atmosphere on the B files first, but if I run init_atmosphere a second time on the A files, how do I ensure that the output will be merged instead of overwritten?
Thanks,
Frank Colby
UMass-Lowell