The HEMCO Diagn.rc file

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  1. Minimum system requirements
  2. Installing required software
  3. Configuring your computational environment
  4. Downloading source code
  5. Downloading data directories
  6. Creating run directories
  7. Configuring runs
  8. Compiling
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  10. Output files
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Overview

You can archive any type of emissions (or other quantity) computed by the HEMCO emissions component to netCDF-format diagnostic output. The HEMCO_Diagn.rc file controls diagnostic output options for HEMCO.

You can see the HEMCO_Diagn.rc file that ships with GEOS-Chem 13.0.0 by following this link.

Sample HEMCO_Diagn.rc file

Here is a snapshot of the HEMCO_Config.rc for the GEOS-Chem fullchem simulation run directory.

#------------------------------------------------------------------------------
#                  GEOS-Chem Global Chemical Transport Model                  !
#------------------------------------------------------------------------------
#BOP
#
# !MODULE: HEMCO_Diagn.rc 
#
# !DESCRIPTION: Configuration file for netCDF diagnostic output from HEMCO.
#\\
#\\
# !REMARKS:
#  Customized for the benchmark simulation.
#  TO DO: Add long names, which are used for netCDF variable attributes.
#
# !REVISION HISTORY:
#  13 Feb 2018 - E. Lundgren - Initial version
#EOP
#------------------------------------------------------------------------------
#BOC
# Name             Spec  ExtNr  Cat Hier Dim OutUnit       LongName

###############################################################################
#####   ACET emissions (in bpch ND11, ND28, ND34, ND36, ND46)             #####
###############################################################################
EmisACET_Total     ACET   -1     -1  -1   3   molec/cm2/s  
EmisACET_Anthro    ACET   0      1   -1   3   atomsC/cm2/s
EmisACET_BioBurn   ACET   111    -1  -1   2   atomsC/cm2/s
EmisACET_Biofuel   ACET   0      2   -1   2   atomsC/cm2/s
EmisACET_Biogenic  ACET   108    -1  -1   2   atomsC/cm2/s
EmisACET_DirectBio ACET   108    -1  -1   2   atomsC/cm2/s ACET_from_direct_emissions
EmisACET_MethylBut ACET   108    -1  -1   2   atomsC/cm2/s ACET_from_methyl_butenol
EmisACET_Monoterp  ACET   108    -1  -1   2   atomsC/cm2/s ACET_from_monoterpenes
EmisACET_Ocean     ACET   101    -1  -1   2   atomsC/cm2/s ACET_from_ocean_source

###############################################################################
#####  ALD2 emissions (in bpch ND28, ND34, ND36, ND46. ALD2_Ocean         #####
#####  and is new)                                                        #####
###############################################################################
EmisALD2_Total     ALD2   -1     -1  -1   3   molec/cm2/s
EmisALD2_Anthro    ALD2   0      1   -1   3   atomsC/cm2/s
EmisALD2_BioBurn   ALD2   111    -1  -1   2   atomsC/cm2/s
EmisALD2_Biofuel   ALD2   0      2   -1   2   atomsC/cm2/s
EmisALD2_Biogenic  ALD2   108    -1  -1   2   atomsC/cm2/s
EmisALD2_Ocean     ALD2   101    -1  -1   2   atomsC/cm2/s
EmisALD2_Senesc    ALD2   0      4   -1   2   atomsC/cm2/s

As you can see, you can archive not only the total emissions for a given species, but also the individual emission sectors. This gives you much more flexibility over the GEOS-Chem bpch diagnostic output.

Once you have your HEMCO_Diagn.rc file customized for your given simulation, make sure that you have these settings in your HEMCO_Config.rc file:

DiagnFile:                   HEMCO_Diagn.rc
DiagnPrefix:                 HEMCO_diagnostics
DiagnFreq:                   End

where:

  • DiagnFile specifies the location of the HEMCO_Diagn.rc file.
  • DiagnPrefix specifies the the prefix for all HEMCO-generated diagnostic files.
  • DiagnFreq specifies the diagnostic archival frequency.

You should not really have to edit HEMCO_Diagn.rc unless you are planning to add new species or emissions inventories. The default HEMCO_Config.rc file that ships with your run directory is set up to archive diagnostics for all defined emission species.

For more information

For more information about how to archive diagnostics from HEMCO, please see:

  1. The Diagnostics section of The HEMCO User's Guide
  2. Guide to HEMCO emissions diagnostics



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