Coupling MOZART-4 with Meso-NH for initial and boundary conditions
The following procedure is a beta version of the coupling of Meso-NH with the MOZART-4 CTM. The fortran routines are compatible with the MASDEV_4_9_1 version.
The MOZART-4 CTM model can be used to prescribe chemical initial and boundary conditions for Meso-NH. A full description of the MOZART-4 model is given in Emmons et al. (2010) (http://www.geosci-model-dev.net/3/43/2010/gmd-3-43-2010.html)
STEP 1: download the MOZART-4 simulations from http://www.acom.ucar.edu/wrf-chem/mozart.shtml
DOWNLOAD ONLY ONE DAY PER FILE!
Each daily file contains 4 time slots at 0000, 0600, 1200 and 1800 UTC
MOZART-4 simulations use the meteorological model GEOS-5 and are available from Jan 1, 2007 to Dec 31, 2016 (1.9x2.5 deg and 56 levels)
Change the name of the MOZART file (the default name is too long for Meso-NH)
> cp mozart4-20120206041851846590.nc mozart4-20090101.nc
STEP 2: create an user library (see the A-INSTALL file) and compile the three routines:
STEP 3: Run PREP_REAL_CASE
Specify the type of the chemical file: HCHEMFILETYPE='NETCDF'
Specify the hour (UTC) you need from the MOZART-4 daily file in CDUMMY1 (CDUMMY1="00" or "06" or "12" or "18").
- Be aware that there is no checking of the coherency between the MOZART date and hour and those from the meteorological model used to initialized Meso-NH (ARPEGE, ECMWF, ...).
Specify the type of MOZART-4 simulation (CDUMMY2="NCEP" or CDUMMY2="GEOS5")
Example of PRE_REAL1.nam:
- ! NZ_VERB=5 , NZ_PROC=0 , NB_PROCIO_R=1 , NB_PROCIO_W=8/
&NAM_FILE_NAMES HATMFILE ='ecmwf.O3RIVER.20081201.18',
- HATMFILETYPE='GRIBEX', HCHEMFILE='mozart4-20090101bis.nc', HCHEMFILETYPE='NETCDF', HPGDFILE ='ICARTT1008_PGD_60km' , CINIFILE='CPLCH20040810.60' /
&NAM_VER_GRID NKMAX=50, YZGRID_TYPE='FUNCTN',
- ZDZGRD=60., ZDZTOP=650., ZZMAX_STRGRD=2000., ZSTRGRD=4., ZSTRTOP=6. /
&NAM_BLANK CDUMMY1="00", CDUMMY2="NCEP" /
Limitations of the current version:
- The coupling code is only compatible with the default chemical scheme provided with the model.
Aerosols are not accounted in the present version. However, MOZART-4 provides 3D fields for sulfate, ammonium, ammonium nitrate, SOA, black carbon (hydrophobic, hydrophylic), organic carbon (hydrophobic, hydrophylic), sea salt (NaCl 4 bins) and dust (5 bins). These fields can be read by the read_chem_data_netcdf_case.f90 routine on a similar way than the gaseous species.
Source: S. Strada