The HEMCO Config.rc file

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Overview

In GEOS-Chem v10-01 and later versions, emissions are read, regridded, and calculated by the HEMCO emissions component. The emission settings are specified in the HEMCO Configuration file (HEMCO_Config.rc).

For more information about the HEMCO_Config.rc file, please see:

--Bob Yantosca (talk) 23:25, 16 November 2016 (UTC)

Enabling and disabling emissions

The HEMCO_Config.rc file for each GEOS-Chem simulation contains a set of switches that allow you to quickly toggle individual emissions inventories on or off.

Each time you create a GEOS-Chem run directory from the Unit Tester, a new HEMCO_Config.rc file with default emissions settings will be created in the run directory. These default settings are located near the top of the HEMCO_Config.rc file.

For example, the default emissions settings for the "Standard" full-chemistry simulation are:

# ExtNr ExtName           on/off  Species
0       Base              : on    *
    --> HEMCO_RESTART     :       true
    --> AEIC              :       true
    --> BIOFUEL           :       true
    --> BOND              :       true
    --> BRAVO             :       true
    --> CAC               :       true
    --> XIAO              :       true
    --> EDGAR             :       true
    --> HTAP              :       false
    --> EMEP              :       true
    --> EMEP_SHIP         :       true
    --> GEIA              :       true
    --> LIANG_BROMOCARB   :       true
    --> NEI2005           :       false
    --> NEI2011           :       true
    --> RETRO             :       true 
    --> SHIP              :       true
    --> NEI2011_SHIP      :       false
    --> MIX               :       true
    --> STREETS           :       false
    --> VOLCANO           :       true
    --> RCP_3PD           :       false 
    --> RCP_45            :       false
    --> RCP_60            :       false
    --> RCP_85            :       false
    --> QFED2             :       false
# -----------------------------------------------------------------------------
100     Custom            : off   - 
101     SeaFlux           : on    DMS/ACET
102     ParaNOx           : on    NO/NO2/O3/HNO3
    --> LUT data format   :       nc
    --> LUT source dir    :       $ROOT/PARANOX/v2015-02
103     LightNOx          : on    NO
    --> OTD-LIS factors   :       true
    --> CDF table         :       $ROOT/LIGHTNOX/v2014-07/light_dist.ott2010.dat
104     SoilNOx           : on    NO 
    --> Use fertilizer NOx:       true
105     DustDead          : on    DST1/DST2/DST3/DST4 
106     DustGinoux        : off   DST1/DST2/DST3/DST4
115     DustAlk           : off   DSTAL1/DSTAL2/DSTAL3/DSTAL4
107     SeaSalt           : on    SALA/SALC/Br2
    --> SALA lower radius :       0.01 
    --> SALA upper radius :       0.5
    --> SALC lower radius :       0.5
    --> SALC upper radius :       8.0
    --> Emit Br2          :       true  
    --> Br2 scaling       :       1.0 
116     MarinePOA         : off   MOPO/MOPI 
108     MEGAN             : on    ISOP/ACET/PRPE/C2H4/ALD2
    --> Isoprene scaling  :       1.0 
    --> CO2 inhibition    :       true
    --> CO2 conc (ppmv)   :       390.0
109     MEGAN_Mono        : on    CO/OCPI/MONX
110     MEGAN_SOA         : on    MTPA/MTPO/LIMO/SESQ
111     GFED              : on    NO/CO/ALK4/ACET/MEK/ALD2/PRPE/C3H8/CH2O/C2H6/SO2/NH3/BCPO/BCPI/OCPO/OCPI/POG1/POG2/NAP
    --> GFED3             :       false 
    --> GFED4             :       true
    --> GFED_daily        :       false
    --> GFED_3hourly      :       false
    --> Scaling_CO        :       1.05
    --> Scaling_POG1      :       1.27
    --> Scaling_POG2      :       1.27
    --> Scaling_NAP       :       2.75e-4
    --> hydrophilic BC    :       0.2
    --> hydrophilic OC    :       0.5
    --> fraction POG1     :       0.49
114     FINN              : off   NO/CO/ALK4/ACET/MEK/ALD2/PRPE/C3H8/CH2O/C2H6/SO2/NH3/BCPI/BCPO/OCPI/OCPO/GLYC/HAC
    --> FINN_daily        :       false
    --> Scaling_CO        :       1.0
    --> hydrophilic BC    :       0.2
    --> hydrophilic OC    :       0.5 

If you would like to turn off NEI2011, simply change the true in this line:

     --> NEI2011           :       true

to false:

     --> NEI2011           :       false

And if you also wanted to turn off the MEGAN biogenic emissions, simply change the on in this line:

108     MEGAN             : on    ISOP/ACET/PRPE/C2H4/ALD2

to off:

108     MEGAN             : off    ISOP/ACET/PRPE/C2H4/ALD2

etc.

--Bob Yantosca (talk) 23:08, 16 November 2016 (UTC)



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