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The script attachment:emiss_conv_nc_to_asc.ncl converts netcdf format to lat-lon-val with final emissions in molec/cm2/s. The script [[attachment:emiss_conv_nc_to_asc.ncl]] converts netcdf format to lat-lon-val with final emissions in molec/cm2/s.
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   The following script is an example of how to change the molecular mass for the conversion attachment:BC_conversion_nc_to_asc_O3R.ncl (source: S. Strada)    The following script is an example of how to change the molecular mass for the conversion [[attachment:BC_conversion_nc_to_asc_O3R.ncl]] (source: S. Strada)

Scripts to create emissions files in the right format for PREP PGD

PREP_PGD step

The following scripts are designed to convert the original emission files taken from the GEIA/ECCAD international program (http://eccad.sedoo.fr) to the latitude-longitude-value ascii format needed by the PREP_PGD .

Emissions files are downloaded from the ECCAD web site in the netcdf format.

The script emiss_conv_nc_to_asc.ncl converts netcdf format to lat-lon-val with final emissions in molec/cm2/s.

The script needs to be adapted to the user requirements:

  • The molecular mass has to be changed according to the considered molecule.
  • Emissions in the PREP_PGD program should be in
    • molec/cm2/s
    • ppp m/s
    • microMol/m2/day
    These units are mandatory
  • All the emissions files have to be in the same units (i.e. you cannot mix emissions in molec/cm2/s and in ppp m/s in the same PRE_PGD1.nam)

MESONH step

When running the model, the routine build_emisstabn.F90 in SURFEX will automatically make the conversion of the above mentioned units to molec/m2/s according to the keyword provided in the chemistry file under the EMISUNIT keyword: MOL (if emissions are provided in microMol/m2/day), MIX (if emissions are provided in ppp m/s), CON (emissions are provided in molec/cm2/s).

Examples:

EMISUNIT
emission fluxes in microMole/m2/day
MOL

EMISUNIT
emission fluxes in ppp m/s 
MIX

EMISUNIT
emission fluxes in molec/cm2/s
CON

Mesonh-54: Scripts_to_create_emissions_files_in_the_right_format_for_PREP_PGD (last edited 2013-06-04 11:53:56 by localhost)