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Boundary conditions for WRF can be freely downloaded from ftp://ftp.ecmwf.int/pub/wrf. The output comes from ECMWF's operational HRES forecast and only one day's data is available. For more information please have a look at: ECMWF WRF Test Data. For those who have access to ECMWF MARS (access restricted) they can find the recipe how to retrieve the data for the past.
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With a set of additional utilities, it is possible to use the mozbc package provided by the Atmospheric Chemistry Observations and Modelling Lab (ACOM) of NCAR to pre-process CAMS data with some minor modifications to the original code. The set of additional utilities has been developed as part of the AQMEII project and kindly provided by A. Lupascu (IASS-Posdam) and C. Knote (NCAR): public_box.tar.gz. The package contains:
| Directory ./ECMWF2WRFChem/ | |
|---|---|
| MACC_BC2MOZART.ncl | ncl script to convert CAMS files containing surface pressure, global reactive gases, and aerosols into a single file ready to be used by modified MOZBC package. |
| convert.sh | Runs the ncl script. |
| Directory ./ | |
| mo_mozart_lib.patch | Patch for mo_mozart_lib.f90 program (part of original mozbc package). The file should be copied to mozbc/ and then executed: $>patch < mo_mozart_lib.patch |
| saprc99.inp | Namelist. Defines input and output directories and which variables to interpolate to WRF grid. It is possible to use only those variables already defined in wrfinput_d01, which depends on chemical package and options selected in &chem section of WRF's namelist.input. Here, an example for SAPRC99 chemical mechanism coupled with the MOSAIC aerosol chemistry module with 4 size bins. The users have to provide their own mapping to get the chemical boundary condition for their preferred chemistry option. |
| mozart.inp | A namelist example for mozart package. |
Step 4: Running the model
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