Re: About using FINN for biomass burning emission input for WRF-Chem
Gabriele Pfister
which *.inp to use depends on the chemical scheme you are using. fire_emis.mozc.inp is setup to
Please also note that we have a Discussion Forum for User questions related to our developed tools or the MOZART chemistry options in WRF-Chem: https://www2.acom.ucar.edu/wrf-chem/discussion-forum
Gabi
Hello Yun,
Thank you for your email.
I am cc’ing Gabi Pfister at NCAR to this email, since I am not the expert on running the emissions with WRF-Chem (I really only produce the emissions). Gabi may be able to help with both questions.
However, I can speak to #2 below. I produce emissions of many pollutants that are not always used for different model applications. The OC and BC in the emissions files are bulk carbonaceous emissions, and may include emissions > PM2.5. It is at the discretion of the modeler to choose how they want to use FINN particulate emissions. In the wrf2fire_map file, a decision at one point (and I am not sure when and by whom) to speciate the PM2.5 and PM10, rather than use the OC and BC emissions, was made.
Due to the uncertainties in the emission factors used in the FINN emission estimation process, I think that either are appropriate and well within the uncertainties.
My only recommendation is that when you do your study and publish anything, you make clear what you chose, and which version/dates of the emissions and code you used.
Christine
From: Lin, Yun <yun...@pnnl.gov>
Sent: Wednesday, August 15, 2018 7:10 PM
To: Christine Wiedinmyer <Christine.Wiedinmyer@Colorado.EDU>
Subject: About using FINN for biomass burning emission input for WRF-Chem
Hi Christine,
I am newbie to use FINN as the biomass burning emission input for WRF-Chem simulations. I have downloaded the utility to convert original FINN data to WRF input files (wrffirechemi_*). However, I find there are two *.inp files (i.e. fire_emis.T1_MOZCART.inp and fire_emis.mozc.inp) under the fire_emis/test directory, showing different wrf2fire_map information. I have several questions related to
1) Which *.inp file should I use when running the fire_emis code to prepare biomass burning emission input for WRF-Chem?
2) I am using MOZART4 in 2015 (the file named GLOBAL_FINNv15_2015_MOZ4_11032016.txt) as the original fire emission data. In the data file, there are some species which are not used in the wrf2fire_map section in either *.inp file to convert corresponding species for WRF. For example, there are ‘OC’ and ‘BC’ in MOZART4 file, but wrf2fire_map in both *.inp files use 'oc -> 0.24*PM25 + 0.3*PM10;aerosol', 'bc -> 0.01*PM25 + 0.08*PM10;aerosol’ to do the conversion. Why not use the ‘OC’ and ‘BC’ in MOZART4 file to directly get ‘oc’ and ‘bc’ for WRF?
Thank you in advance,
Yun
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Yun Lin
Post Doctorate RA B
Advanced Study & Development Department
Atmospheric Sciences & Global Change Division
Pacific Northwest National Laboratory
Gabriele Pfister, Deputy Director