# Guidance Needed on Running CMAQ with Updated Emissions for 2020!

**URL:** <https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868>\
**Category:** CMAQ\
**Created:** [June 25, 2025, 9:22am UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868 "2025-06-25T09:22:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![derekthelr](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/derekthelr/32/4459_2.png) [@derekthelr](https://forum.cmascenter.org/u/derekthelr)\
**Post date:** [June 25, 2025, 9:22am UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868/1 "2025-06-25T09:22:50Z")

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Hi all,

I am currently working on setting up a CMAQ v5.4 run for a 2020 episode over the eastern U.S., and I would really appreciate some guidance. I have experience running older CMAQ versions…, but this is my first time integrating updated emissions inventories (specifically 2020 NEI data) with the latest CMAQ release.

I have successfully compiled CMAQ and SMOKE.., but I am unclear on a few things:

Are there any known issues or configuration tips when using 2020 emissions with v5.4: ??

Is there a preferred speciation profile or mapping file when working with newer NEI datasets: ??

Can anyone share example run scripts or a GitHub resource with a similar setup: ??

I have checked the CMAS documentation and past forum threads like [https://forum.cmascenter.org/t/emission-files-prepared-for-](https://forum.cmascenter.org/t/emission-files-prepared-for-2020/4507)  
[sap fico course in delhi](https://www.igmguru.com/erp-training/sap-fico-training-in-delhi).., but didn’t find answers to some of these specifics. Any help from those with experience in this would be greatly appreciated.

Thanks in advance !!

Derek Theler

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**Author:** ![discourse\_ai\_spam](https://avatars.discourse-cdn.com/v4/letter/d/c68b51/32.png) [@discourse\_ai\_spam](https://forum.cmascenter.org/u/discourse_ai_spam)\
**Post date:** [June 25, 2025, 9:22am UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868/2 "2025-06-25T09:22:52Z")

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Unlisted on June 25, 2025, 9:22am UTC



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**Author:** ![system](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/1X/9a72c78e529465c3f1053af404e3033b0875428c.png) [@system](https://forum.cmascenter.org/u/system)\
**Post date:** [June 25, 2025, 11:26am UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868/3 "2025-06-25T11:26:46Z")

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Listed on June 25, 2025, 11:26am UTC



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**Author:** ![lizadams](https://avatars.discourse-cdn.com/v4/letter/l/49beb7/32.png) [@lizadams](https://forum.cmascenter.org/u/lizadams)\
**Post date:** [July 1, 2025, 3:34pm UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868/4 "2025-07-01T15:34:15Z")

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There is a sample run script provided in the 2020 S3 Bucket, as described in this dataverse entry for the 2020 S3 Bucket.  
[https://dataverse.unc.edu/dataset.xhtml?persistentId=doi:10.15139/S3/W4HCMV](https://dataverse.unc.edu/dataset.xhtml?persistentId=doi:10.15139/S3/W4HCMV)

Liz

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**Author:** ![system](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/1X/9a72c78e529465c3f1053af404e3033b0875428c.png) [@system](https://forum.cmascenter.org/u/system)\
**Post date:** [July 8, 2025, 3:34pm UTC](https://forum.cmascenter.org/t/guidance-needed-on-running-cmaq-with-updated-emissions-for-2020/5868/5 "2025-07-08T15:34:36Z")

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Closed on July 8, 2025, 3:34pm UTC

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