This guide assumes that one has successfully run the regional refined simulation following the instructions (https://acme-climate.atlassian.net/wiki/display/ATM/Configuring%2C+building%2C+and+running+regionally+refined+CONUS+grid).
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- Create the analysis fields on the RRM grids
- Interpolate the analysis fields (e.g., ECMWF, NCEP, MERRA, and etc.) to the RRM grid.
- The nudging code (ACME/models/atm/cam/src/physics/cam/nudging.F90) is developed by Patrick Callaghan. The code can nudge the model states of U, V, T, Q, and/or PS in the physics module.
- It is important, in some cases, to account for the differences in the topography used in the source analysis data and that for a specific RRM configuration.
- If interested in the analysis fields used for the RRM-CONUS nudging simulation, please contact Qi Tang.
- Specify the nudging parameters
- The nudging parameters can be specified in the user_nl_cam.
- Details about the parameters are given in nudging.F90
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- An updated version of example is documented in a recent GMD paper (Tang et al., 2019).
An example of nudging U and V outside the CONUS domain in the simulation for the CSSEF project is provided below:
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Nudge_File_Template='interim_se_%y%m%d00_%y%m%d18%y%m%d18_TQUV.nc'
Nudge_Times_Per_Day=4
Model_Times_Per_Day=144
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Nudge_Vwin_Ldelta =0.1
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