Difference between revisions of "Running WRF-GC"
From atmoschem
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| − | + | The process of running WRF-GC is very similar to running WRF-Chem. | |
| − | + | =Running the WPS= | |
| − | Running the WRF Preprocessing System (WPS) is to prepare input to drive WRF. Please refer to the WRF User's Guide for more detail: | + | Running the WRF Preprocessing System (WPS) is to prepare input to drive WRF. Please refer to the [http://www2.mmm.ucar.edu/wrf/users/docs/user_guide_V3.9/users_guide_chap3.html WRF User's Guide] for more detail: |
| − | |||
| − | + | ==Step 1: Define model domains with geogrid== | |
:In the "geogrid" namelist record, the projection of the simulation domain is defined. Only two possible map projections and specified parameters are supported in WRF-GC: | :In the "geogrid" namelist record, the projection of the simulation domain is defined. Only two possible map projections and specified parameters are supported in WRF-GC: | ||
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| − | + | ||
| + | ==Step 2: Extracting meteorological data from GRIB files with ungrib== | ||
:Downloading meteorological data for the real data case | :Downloading meteorological data for the real data case | ||
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| − | + | ==Step 3: Horizontally interpolating meteorological data with metgrid== | |
| + | |||
| − | + | =Preparing GEOS-Chem shared data directories= | |
The GEOS-Chem shared data directories contain many large files necessary for the WRF-GC. Please Set up the top-level root directory for GEOS-Chem shared data, which is called '''ExtData'''. Please create the '''/dir/to/data/ExtData''' and set your directories in the ''"input.geos"'' file: | The GEOS-Chem shared data directories contain many large files necessary for the WRF-GC. Please Set up the top-level root directory for GEOS-Chem shared data, which is called '''ExtData'''. Please create the '''/dir/to/data/ExtData''' and set your directories in the ''"input.geos"'' file: | ||
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| − | + | =Emissions for WRF-GC= | |
| − | Preparing emission files is not | + | Preparing emission files is not required. WRF-GC uses the Harvard-NASA Emissions Component (HEMCO) with on-line regridding. Configure HEMCO refer to the ''"HEMCO_Config.rc"'' file inside the run directory for WRF. For more information on HEMCO data directories, please refer to [http://wiki.seas.harvard.edu/geoschem/index.php/HEMCO_data_directories the GEOS-Chem wiki]: |
| − | |||
| − | + | =Preparing chemical initial/boundary condition data= | |
Chemical initial and boundary condition data are used output from global simulation MOZART-4/GEOS-5 similar to WRF-Chem. Please download the data from : | Chemical initial and boundary condition data are used output from global simulation MOZART-4/GEOS-5 similar to WRF-Chem. Please download the data from : | ||
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| − | + | =Running WRF-GC= | |
To Configure WRF-GC, you need to edit three files inside the WRF run directory. | To Configure WRF-GC, you need to edit three files inside the WRF run directory. | ||
Revision as of 08:49, 25 December 2018
The process of running WRF-GC is very similar to running WRF-Chem.
Contents
Running the WPS
Running the WRF Preprocessing System (WPS) is to prepare input to drive WRF. Please refer to the WRF User's Guide for more detail:
Step 1: Define model domains with geogrid
- In the "geogrid" namelist record, the projection of the simulation domain is defined. Only two possible map projections and specified parameters are supported in WRF-GC:
- • Mercator /'mercator' (truelat1)
- • Unrotated regular latitude-longitude /'lat-lon' (pole_lat, pole_lon, stand_lon)
Step 2: Extracting meteorological data from GRIB files with ungrib
- Downloading meteorological data for the real data case
Step 3: Horizontally interpolating meteorological data with metgrid
The GEOS-Chem shared data directories contain many large files necessary for the WRF-GC. Please Set up the top-level root directory for GEOS-Chem shared data, which is called ExtData. Please create the /dir/to/data/ExtData and set your directories in the "input.geos" file:
Root data directory : /dir/to/data/ExtData
The ExtData directory structure cotains two subdirectories:
- CHEM_INPUT: Non-emissions data for GEOS-Chem chemistry modules
- • Download the CHEM_INPUT data directories via anonymous FTP from the Harvard data directory archive (ftp.as.harvard.edu). Please refer to : http://wiki.seas.harvard.edu/geos-chem/index.php/Downloading_GEOS-Chem_source_code_and_data
- HEMCO: Emissions inventories for the HEMCO emissions component
- • Download the HEMCO data directories with a pakeage provided by GEOS-Chem Support Team. Please refer to : http://wiki.seas.harvard.edu/geos-chem/index.php/HEMCO_data_directories#Downloading_the_HEMCO_data_directories
- • Set the HEMCO data directory in the "HEMCO_Config.rc" file
Root : /dir/to/data/ExtData/HEMCO
Emissions for WRF-GC
Preparing emission files is not required. WRF-GC uses the Harvard-NASA Emissions Component (HEMCO) with on-line regridding. Configure HEMCO refer to the "HEMCO_Config.rc" file inside the run directory for WRF. For more information on HEMCO data directories, please refer to the GEOS-Chem wiki:
Preparing chemical initial/boundary condition data
Chemical initial and boundary condition data are used output from global simulation MOZART-4/GEOS-5 similar to WRF-Chem. Please download the data from :
• https://www.acom.ucar.edu/wrf-chem/mozart.shtml
The Mozart data are processed by the WRF-Chem processor called mozbc. Please download the mozbc utility, including instructions and input files from :
• https://www.acom.ucar.edu/wrf-chem/download.shtml
Running WRF-GC
To Configure WRF-GC, you need to edit three files inside the WRF run directory.
- HEMCO_Config.rc (Please refer to: http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_Input_Files#The_HEMCO_Config.rc_file)
- • HEMCO_Config.rc file contains a set of switches to enable and disable emission inventories, such as:
# ExtNr ExtName on/off Species
0 Base : on *
--> HEMCO_RESTART : false
--> AEIC : true
--> BIOFUEL : true
... etc not shown here ...
- • Errors with HEMCO component when running a simulation are output into a log file called "HEMCO.log".
- input.geos
- • Simulation Menu (except Root data directory) and Timestep Menu in input.geos can be safely ignored.
- • Determine the Advected Species Menu, Transport Menu, Convection Menu, Emission Menu, Aerosol Menu, Deposition Menu and Chemistry Menu according to your specific simulation (Please refer to : http://wiki.seas.harvard.edu/geos-chem/index.php/GEOS-Chem_Input_Files).
- • Other Menus in "input.geos" can be safely ignored.
- namelist.input
....available soon....
To run WRF-GC, use the distributed-memory parallel version of WRF's real.exe and wrf.exe, like -
mpirun -np 6 ./wrf.exe
To monitor output from WRF&GEOS-Chem, you can tail the "rsl.out.000" file:
tail -f rsl.out.0000
Output from WRF&GEOS-Chem are unified into the WRF output format (NetCDF Classic) files starting with wrfout.
