# Compatibility questions for the WRF–CMAQ two-way coupled model

**URL:** <https://forum.cmascenter.org/t/compatibility-questions-for-the-wrf-cmaq-two-way-coupled-model/6057>\
**Category:** WRF-CMAQ\
**Created:** [November 11, 2025, 9:03am UTC](https://forum.cmascenter.org/t/compatibility-questions-for-the-wrf-cmaq-two-way-coupled-model/6057 "2025-11-11T09:03:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Jinseung](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jinseung](https://forum.cmascenter.org/u/Jinseung)\
**Post date:** [November 11, 2025, 9:03am UTC](https://forum.cmascenter.org/t/compatibility-questions-for-the-wrf-cmaq-two-way-coupled-model/6057/1 "2025-11-11T09:03:04Z")

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I am currently working with the **WRF–CMAQ two-way coupled model (WRF 4.3 – CMAQ v5.3.3)** and would like to clarify the following points regarding its compatibility and capabilities:

1. Is it possible to use **ISAM (Integrated Source Apportionment Method)** within the **two-way WRF–CMAQ** framework?

2. Can the **WRF component** in the two-way coupled system be further **coupled with ROMS** (for atmosphere–ocean interactions)?

3. Is the **Process Analysis ¶** module available and functional in the **two-way coupled WRF–CMAQ** configuration?

Thank you very much for your time and support.

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**Author:** ![willison.jeff](https://avatars.discourse-cdn.com/v4/letter/w/c89c15/32.png) [@willison.jeff](https://forum.cmascenter.org/u/willison.jeff)\
**Post date:** [November 12, 2025, 8:55pm UTC](https://forum.cmascenter.org/t/compatibility-questions-for-the-wrf-cmaq-two-way-coupled-model/6057/2 "2025-11-12T20:55:58Z")

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There’s no reason to expect that ISAM or process analysis wouldn’t work with the WRF-CMAQ model, but neither is well tested because this is not a common way to configure the model.

WRF is commonly coupled with ROMS using the COAWST framework ([https://www.usgs.gov/centers/whcmsc/science/coawst-a-coupled-ocean-atmosphere-wave-sediment-transport-modeling-system](https://www.usgs.gov/centers/whcmsc/science/coawst-a-coupled-ocean-atmosphere-wave-sediment-transport-modeling-system))