# Create emission files by my data emission for wrf-chem

Does anybody here have any experience with creating my own wrfchemi outputs from the emissions that are in different format, txt, netcdf and grib for instance?

What I want to do, basically, is to use my own emissions inside the WRF/Chem model.

I have a netcdf and grib and txt of emissions of co2 and ch4 (gridded) with each grid having a value for the emissions. I want to convert this to a readable format for the WRF/Chem.

• I've created emissions files for WRF-Chem, but not for CO$_2$ or CH$_4$ exactly. I've primarily used the NEI emissions dataset for air quality. But I think a critical question that must be asked is where are you deriving your anthropogenic emissions from? You usually get the wrfchemi file from convert_emiss.exe which is produced after ./compile emi_conv (provided there aren't any errors after you've made the necessary adjustments). – BarocliniCplusplus Feb 10 '20 at 21:57
• The convert_emiss.exe program takes the biogenic and anthropogenic intermediate emissions files and produces the netCDF emissions file. However, for it to work properly, you need to have the intermediate emissions files, so you need a source, such as EDGAR/RETRO (which you can follow in the emissions guide). But like I said above, I don't know how my experience carries over, as the NEI is not suggested for CO$_2$ or CH$_4$ emissions, and I struggled to make other emissions inventories work properly. – BarocliniCplusplus Feb 10 '20 at 22:02