HEMCO_Diagn output

[ymxu-atm]

Your name

Yiming

Your affiliation

Purdue University

Please provide a clear and concise description of your question or discussion topic.

Hi,
I am running Geos-Chem for CO2 simulation. In the file HEMCO_Diagn.rc, I have the following which is default setting:

# Name                Spec   ExtNr Cat Hier Dim OutUnit  LongName

EmisCO2_Total         CO2      0   -1   -1   3  kg/m2/s  CO2_total_emissions
EmisCO2_FossilFuel    CO2      0    1   -1   2  kg/m2/s  CO2_anthropogenic_emissions
EmisCO2_Ocean         CO2      0    2   -1   2  kg/m2/s  CO2_ocean_emissions
EmisCO2_BalBiosph     CO2      0    3   -1   2  kg/m2/s  CO2_balanced_biosphere
EmisCO2_NetTerrExch   CO2      0    5   -1   2  kg/m2/s  CO2_net_terrestrial_exchange
EmisCO2_Ship          CO2      0    6   -1   2  kg/m2/s  CO2_ship_emissions
EmisCO2_Aviation      CO2      0    7   -1   3  kg/m2/s  CO2_aviation_emissions
EmisCO2_CO2SurfCorr   CO2      0    8   -1   2  kg/m2/s  CO2_surface_correction_for_CO_oxidation

However, in the output file HEMCO_diagnostics.xxxx.nc, I cannot find any emission variables. I will appreciate it if you can help.

Best,
Yiming

[yantosca]

Thanks for writing @yiming. Please check that the DiagnFreq setting in the HEMCO_Config.rc matches the length of your simulation. For example. if you have:

DiagnFreq:                   Monthly

but your simulation does not last for 1 month, you won't get output. See this section in the HEMCO manual for allowable options for DiagnFreq:

• https://hemco.readthedocs.io/en/stable/hco-ref-guide/hemco-config.html#diagnfreq

[ymxu-atm]

@yantosca Thank you for your reply. In my HEMCO_Config.rc file, DiagnFreq is set as Monthly. I ran the model for more than 1 year. The model did output the HEMCO_diagnostics.XXXX.nc file. However, in this file, I cannot find any variable about the emission.