Are agricultural emissions (from fertilizer application) included in input data repository emissions for NH3/NOx?

[Hemraj]

Hi,
In the input data repository (https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/atm/cam/chem/emis/emissions_ssp126/), I can see biomass burning (bb) and anthropogenic (anthro) emissions .nc files. I am wondering do these files include the emissions from agricultural activities. For e.g., NH3 or NOx can be released from fertilizer application in agricultural areas. Will it be right if I guess, these emissions are associated with anthropogenic activities so are included in the 'anthro' .nc file?
Thank you.

-Hemraj

 

[slevis]

Seems likely. I used ncdump to look for metadata in one of the files. For example,

ncdump emissions-cmip6-ScenarioMIP_IAMC-REMIND-MAGPIE-ssp585-1-1_bc_a4_anthro_surface_mol_175001-210101_0.9x1.25_c20190224.nc

...and found possibly useful information for you:

:data_summary = "Emissions from the Community Emission Data System (CEDS) have been manipulated for use in CESM2 for CMIP6. Original files: BC-em-anthro_input4MIPs_emissions_CMIP_CEDS-2017-05-18_gn_175001-179912.nc, " ;
:cesm_contact = "Louisa Emmons or Simone Tilmes" ;
...
:data_source_url = "http://www.globalchange.umd.edu/ceds/ceds-cmip6-data/" ;
:data_reference = "Hoesly et al., GMD, 2017 (http://www.geosci-model-dev-discuss.net/gmd-2017-43/)" ;

@tilmes may have additional information.

 

[Hemraj]

Thank you @slevis
I think it's hard to tell if agricultural emissions are included based on these pieces of information.

 

[oleson]

The paper referenced above seems to contain multiple references to the inclusion of agricultural emissions, e.g.,
"We note that, while agriculture sectors include a large variety of activities, in practice, in the current CEDS system these sectors largely represent NH3 and NOx emissions from fertilizer application (under 3-D_Soil-emissions) and manure management, due to the focus in the current CEDS system on air pollutant emissions."
"CEDS energy estimates are consistently larger than CMIP5 emissions, by 22–58 %, while CEDS agriculture emissions are consistently 10–15 % smaller than CMIP5 estimates, except in 2000 (6 % smaller) when CMIP5 estimates dip and CEDS emissions flatten due to our inclusion of FAO agriculture data."

But you could post on the CAM-Chem Forum, I imagine they would know for sure.