Update carbon simulations to use archived TCR-2 OH fields by default

[msulprizio]

Your name

Melissa Sulprizio

Your affiliation

Harvard University

Provide a clear and concise overview of the new feature requested.

At IGC11 the Carbon Gases Working Group requested the default OH fields used in carbon simulations be updated from old archived GEOS-Chem fields to TCR-2 fields from Kazuyuki Miyazaki

Kuzi wrote:

It would be great if the GEOS-Chem community could use my TCR-2 OH data.

The monthly OH products are available at NASA DAAC: https://disc.gsfc.nasa.gov/datasets/TRPSCROHM3D_1/summary

Product summary:

• Shortname: TRPSCROHM3D
• Longname: TROPESS Chemical Reanalysis OH Monthly 3-dimensional Product V1
• DOI: 10.5067/POL5GL2M4JQX
• Version: 1
• Format: netCDF
• Spatial Coverage: -180.0,-90.0,180.0,90.0
• Temporal Coverage: 2005-01-01 to 2021-12-31
• File Size: 45 MB per file
• Data Resolution
• Spatial: 1.125 ° x 1.125 °
• Vertical: 2 km

Reference(s)

• Miyazaki, Kazuyuki (2024), TROPESS Chemical Reanalysis OH Monthly 3-dimensional Product V1, Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center (GES DISC), Accessed: 29 Oct 2024, 10.5067/POL5GL2M4JQX

• README Document for TROPESS Chemistry Reanalysis

Will you be implementing this feature yourself?

Yes

Additional information

No response

[msulprizio]

I have downloaded the netCDF files and am checking for compatibility with HEMCO and MAPL.

Ideally, this would be implemented in GEOS-Chem in 14.6.0, after the CH4, CO2, and tagCO simulations are retired in favor of the carbon simulation.

Note that we should also retain the option to use archived GEOS-Chem OH fields. For example, CH4 within the Integrated Methane Inversion (IMI) workflow still relies on the v5 OH fields.