NEI inventory for recent years

[Carlos Bucaram]

Good day,

I would appreciate your comments with a couple of questions:

1. If WRF-Chem is no  longer supported, but only the MOZART chemical gas mechanism, would this mean that MOZART is the only gas mechanism within WRF-Chem which would be supported for troubleshooting purposes? Are there any aerosol mechanisms currently being supported?

2. I was wondering if there is an updated version of the National Emission Inventory (NEI) suitable for processing with WRF-Chem to predict the dispersion of main atmospheric pollutants. If understood correctly, the last NEI that was developed by NCAR and NOAA was NEI-2017. 

So, should we look into GRAPES developed by CSL, if we would like to study regional air quality in a more recent scenario, or if you would have some other recommendation?

Thank you in advance for your help,

Carlos Bucaram

[Gabriele Pfister]

Hi Carlos, 

please see my answers below. 

Best, 

Gabi

On Fri, Dec 19, 2025 at 1:34 PM Carlos Bucaram <cjbu...@gmail.com> wrote:

Good day,

I would appreciate your comments with a couple of questions:

1. If WRF-Chem is no  longer supported, but only the MOZART chemical gas mechanism, would this mean that MOZART is the only gas mechanism within WRF-Chem which would be supported for troubleshooting purposes? Are there any aerosol mechanisms currently being supported?

 

WRF and WRF-Chem are being phased out which means that there is further development on the models and there is also only limited support available anymore. We at NCAR are only able to help users with the by us contributed developments (i.e. the suite of MOZART mechanisms including MOZART, MOZCART, MOZART-MOSAIC and T1-MOZCART) as well as the preprocessing tools we provide on our website. 

For any other WRF or WRF-Chem questions users should reach out to the WRF/MPAS Forum: https://forum.mmm.ucar.edu/

2. I was wondering if there is an updated version of the National Emission Inventory (NEI) suitable for processing with WRF-Chem to predict the dispersion of main atmospheric pollutants. If understood correctly, the last NEI that was developed by NCAR and NOAA was NEI-2017. 

So, should we look into GRAPES developed by CSL, if we would like to study regional air quality in a more recent scenario, or if you would have some other recommendation?

The NEI inventories are being developed by the U.S. EPA (https://www.epa.gov/air-emissions-inventories/national-emissions-inventory-nei) and have been provided to us by EPA. The latest we offer on our website is NEI 2017v2,  however, EPA_anthro_emis should work with any CMAQ ready emissions but you would need to adjust the namelist accordingly. 

I myself have not used the GRAPES inventory but maybe there is other users on this Forum who have done so and will be able to help you with it. 

 

Thank you in advance for your help,

Carlos Bucaram

--

================================
Gabriele Pfister

Atmospheric Chemistry Observations & Modeling (ACOM) Lab

NSF National Center for Atmospheric Research (NCAR)

Email: pfi...@ucar.edu

Work Phone: +1 303 497 2915

Web: https://staff.ucar.edu/users/pfister

[Carlos Bucaram]

Dear Dr. Pfister,

Thank you for your feedback and comments on the previous inquiries.

Kind regards,

Carlos Bucaram