D
Deleted member 3607
Guest
Just skimmed the new users guide for 4.4 and I saw this.
Has anyone been able to get this to install yet? I'd like to add it to my WRF chem install scripts.
___________________________________________
Aerosol/Chemical Data Assimilation
Aerosol/Chemical data assimilation capability is added in version 4.3 and updated in version 4.4 (WRFDA Updates for 4.4). Currently it allows the assimilation of 6 types of surface measurements (PM2.5, PM10, O3, CO, NO2, SO2) with 3DVAR, which can provide the analyzed initial conditions for WRF-Chem. This new capability is documented by Sun et al. (2020) and Ha (2022).
Sun, W., Liu, Z., Chen, D., Zhao, P., and Chen, M., 2020: Development and application of the WRFDA-Chem three-dimensional variational (3DVAR) system: aiming to improve air quality forecasting and diagnose model deficiencies, Atmos. Chem. Phys., 20, 9311-9329.
Ha, S., 2022: Implementation of aerosol data assimilation in WRFDA (v4.0.3) for WRF-Chem (v3.9.1) using the RACM/MADE-VBS scheme, Geosci. Model Dev., 15, 1769–1788, Implementation of aerosol data assimilation in WRFDA (v4.0.3) for WRF-Chem (v3.9.1) using the RACM/MADE-VBS scheme.
Here we give some information about how to compile and configure WRFDA for this capability. The four gas-phase analysis variables include O3, CO, NO2 and SO2. For aerosols, it works with GOCART, MOSAIC (4 bin), and MADE/VBS aerosol scheme in WRF-Chem, consisting of 15, 32 or 35 species, respectively.
To compile 3DVAR with aerosol/chemical DA capability, following the commands below:
setenv WRF_CHEM 1
./configure wrfda
./compile all_wrfvar
The executable is still da_wrfvar.exe, but now it can take WRF-Chem’s initial condition file as the background (i. e., the ‘fg’ file) and perform the aerosol/chemical analysis in addition to the usual function for meteorological analysis. All related settings are in a new namelist section named wrfvarchem. Each namelist parameter is explained below.
&wrfvarchem
chem_cv_options= 10/20/108, control variables are 4 gas + GOCART, MOSAIC or MADE/VBS
aerosol variables. Default is 0, no aerosol/chemical DA.
chemicda_opt=1/2/3/4/5, assimilate pm2.5/pm10/pm2.5+pm10/co+o3+so2+no2/6-species.
Default is 1.
var_scaling12=1.0, 1.0, …, array with a dimension of 45*max_outer_iterations, inflation factors of
chemical background error variances of aerosol/gas analysis variables at different
outer loops. Default values are 1 (no inflation).
len_scaling12=1.0, 1.0, …, arrary with a dimension of 45*max_outer_iterations, inflation factors of
chemical background error length scales. Default values is 1.
use_chemic_surfobs = .true., Default is true, read in ob_chemsfc.ascii file that includes 6 types of
observations at analysis time. Please refer to var/da/da_obs_io/da_read_obs_chem_sfc.inc for format.
/
The standard GEN_BE package included in WRFDA cannot obtain the background error statistics for aerosol/chemical variables, users will need to use GitHub - wrf-model/GENBE_2.0: Repository for the new stand-alone GEN_BE capability for WRFDA. to generate a be.dat file that contains the background errors of chemical variables. Please refer to the online commit message for its use.
A testcase is provided in Index of /wrf/users/wrfda/chemda_testcase. We have no resource to provide the assistance of this capability for users’ own applications without funding support.
Has anyone been able to get this to install yet? I'd like to add it to my WRF chem install scripts.
___________________________________________
Aerosol/Chemical Data Assimilation
Aerosol/Chemical data assimilation capability is added in version 4.3 and updated in version 4.4 (WRFDA Updates for 4.4). Currently it allows the assimilation of 6 types of surface measurements (PM2.5, PM10, O3, CO, NO2, SO2) with 3DVAR, which can provide the analyzed initial conditions for WRF-Chem. This new capability is documented by Sun et al. (2020) and Ha (2022).
Sun, W., Liu, Z., Chen, D., Zhao, P., and Chen, M., 2020: Development and application of the WRFDA-Chem three-dimensional variational (3DVAR) system: aiming to improve air quality forecasting and diagnose model deficiencies, Atmos. Chem. Phys., 20, 9311-9329.
Ha, S., 2022: Implementation of aerosol data assimilation in WRFDA (v4.0.3) for WRF-Chem (v3.9.1) using the RACM/MADE-VBS scheme, Geosci. Model Dev., 15, 1769–1788, Implementation of aerosol data assimilation in WRFDA (v4.0.3) for WRF-Chem (v3.9.1) using the RACM/MADE-VBS scheme.
Here we give some information about how to compile and configure WRFDA for this capability. The four gas-phase analysis variables include O3, CO, NO2 and SO2. For aerosols, it works with GOCART, MOSAIC (4 bin), and MADE/VBS aerosol scheme in WRF-Chem, consisting of 15, 32 or 35 species, respectively.
To compile 3DVAR with aerosol/chemical DA capability, following the commands below:
setenv WRF_CHEM 1
./configure wrfda
./compile all_wrfvar
The executable is still da_wrfvar.exe, but now it can take WRF-Chem’s initial condition file as the background (i. e., the ‘fg’ file) and perform the aerosol/chemical analysis in addition to the usual function for meteorological analysis. All related settings are in a new namelist section named wrfvarchem. Each namelist parameter is explained below.
&wrfvarchem
chem_cv_options= 10/20/108, control variables are 4 gas + GOCART, MOSAIC or MADE/VBS
aerosol variables. Default is 0, no aerosol/chemical DA.
chemicda_opt=1/2/3/4/5, assimilate pm2.5/pm10/pm2.5+pm10/co+o3+so2+no2/6-species.
Default is 1.
var_scaling12=1.0, 1.0, …, array with a dimension of 45*max_outer_iterations, inflation factors of
chemical background error variances of aerosol/gas analysis variables at different
outer loops. Default values are 1 (no inflation).
len_scaling12=1.0, 1.0, …, arrary with a dimension of 45*max_outer_iterations, inflation factors of
chemical background error length scales. Default values is 1.
use_chemic_surfobs = .true., Default is true, read in ob_chemsfc.ascii file that includes 6 types of
observations at analysis time. Please refer to var/da/da_obs_io/da_read_obs_chem_sfc.inc for format.
/
The standard GEN_BE package included in WRFDA cannot obtain the background error statistics for aerosol/chemical variables, users will need to use GitHub - wrf-model/GENBE_2.0: Repository for the new stand-alone GEN_BE capability for WRFDA. to generate a be.dat file that contains the background errors of chemical variables. Please refer to the online commit message for its use.
A testcase is provided in Index of /wrf/users/wrfda/chemda_testcase. We have no resource to provide the assistance of this capability for users’ own applications without funding support.