# How to set up a CMAQ vertical simulation

**URL:** <https://forum.cmascenter.org/t/how-to-set-up-a-cmaq-vertical-simulation/5042>\
**Category:** CMAQ\
**Created:** [June 30, 2024, 5:52am UTC](https://forum.cmascenter.org/t/how-to-set-up-a-cmaq-vertical-simulation/5042 "2024-06-30T05:52:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bigboy1](https://avatars.discourse-cdn.com/v4/letter/b/c68b51/32.png) [@bigboy1](https://forum.cmascenter.org/u/bigboy1)\
**Post date:** [June 30, 2024, 5:52am UTC](https://forum.cmascenter.org/t/how-to-set-up-a-cmaq-vertical-simulation/5042/1 "2024-06-30T05:52:20Z")

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Hello everyone !  
I used CMAQ to simulate the PM2.5 distribution. A total of 31 vertical floors are installed. Same as WRF. But after the simulation, the PM2.5 concentration in the first layer was 27.9, and the highest layer was 27.8.