CRACMMv2 speciated sector emissions in SMOKEv5.1

SMOKE Speciation Tool
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Hello,

I am working on generating CRACMMv2 speciated emission files using SMOKEv5.1. However, since this is my first time using SMOKE I’m a bit confused whether I’m using the correct ancillary files from Speciate and the S2S tool. Currently, I am using gspro, gsref, and invtable files for CRACMMv2 from the epa’s 2022 air modeling repository (https://gaftp.epa.gov/Air/emismod/2022/v1/for_CRACMM/). In this folder, they provide input files to be used for onroad, nonroad, cmv, Mexico_onroad, and general emission sectors. However, this differs a bit from what I’ve seen from ancillary files for the CB6 chemical mechanism. For example, the files available for CB6 are split into several specific sectors rather than a general one (np_oilgas, ptfire, np_solvents, rwc, etc). When running SMOKE with CRACMMv2 speciation, should users simply utilize the general ancillary files for all point and nonpoint emission sectors (excluding cmv_c1c2 and cmv_c3)? Or is there a way to generate sector-specific ancillary files with S2S, similarly to the CB6 mechanism? Any advice is appreciated. Thanks!

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Preparation of the standard CB6 packages has become more automated, the end result being that each sector has its own GSPRO and GSREF in our recent EMP packages, even though many of the GSPROs and GSREFs across different sectors are identical.

For the CRACMM addendum package, there is not a separate GSPRO or GSREF for each sector; instead a general GSPRO/GSREF is provided to be used by most sectors, and then additional ones to use for specific sectors that shouldn’t use the general one. In other words, gsref_cmaq_cracmmv2_P229_2022hc_CRACMM2_nf.txt and gspro_cmaq_cracmmv2_P229_2022hc_CRACMM2_03oct2024.txt should be used for all sectors that don’t have a sector-specific file in the package (all but onroad/onroad_ca_adj, nonroad, cmv_c1c2/cmv_c3, and mexico_onroad).

Does this answer your question?

1 Like
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Yes, this definitely answers my question. Thank you!