Current BUMP seems only support constant length scale for 3D-Var, or one value for RH or RV over the whole domain. Is there any way to have region-dependence B-matrix in BUMP, including urban/rural difference etc? Thanks
Hi @ytangnoaa. Absolutely, the current implementation supports two streams for input rh/rv:
- In the
bumpsection of the yaml file, you can specify a value per variable or a value per variable and level for
- In the
inputsection of the yaml file, you can provide paths of files containing values of
rv, for instance here. These files have the same format as other files containing a model state (thus, they are model-specific). They can be produced in a previous diagnostic step with BUMP (example here), or created manually with any other software.
Thank you for this information. These yaml files are in the FV3-JEDI testinput folder. However, the ctest file does not include them, and the required model files are not there. How can I download and try it?
staticb_[...] tests are included in the tier 2 of FV3-JEDI tests (more expensive ones). To run them, you need to set the environment variable:
and then rebuild your bundle (simply do a
touch on a
CMakeLists.txt file and recompile). You should see the new tests when running
Thank you. It outputs the nicas_norm file based on https://github.com/JCSDA-internal/fv3-jedi/blob/94cfe8521d3b86d97e31068fd1d74c68f47dccd1/test/testinput/staticb_nicas_gfs.yaml#L52
How can I apply this nicas_norm file in 3D-Var DA?