Variables in SMOKE-processed NEI emission files

NEI Modeling Platform
1

Hi,

I want to ask if there is a file explaining what chemical species each variable in the SMOKE-processed NEI emission files (shown in the Figure) represent.

2025-03-18 (1)
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Thanks,
Huazhen

2

Hi Huazhen,
While the file has these variables, not all of them are read and processed by CMAQ (such as the DIESEL_ variables which are not read by CMAQ in general) because the variables to be used are determined by the mechanism. For CB6 mechanism, you can refer to the link below:

In page 28-29, you can find the species table as shown below.
Feel free to reply back or directly contact me through wechat.

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3

Please see the 2021 platform Technical Support Document Tables 3-3 and 3-4. It is linked from this page: https://www.epa.gov/air-emissions-modeling/2021-emissions-modeling-platform

4

Thanks for the information.