geoschem / GCClassic

This repository contains the "superproject" wrapper for the "Classic" configuration of the GEOS-Chem model of atmospheric chemistry and composition.
https://geos-chem.readthedocs.io
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New submodule: HETP aerosol thermodynamics #55

Closed lizziel closed 7 months ago

lizziel commented 7 months ago

Name and Institution (Required)

Name: Lizzie Lundgren Institution: Harvard University

Describe the update

This PR adds the ISOROPPIA II aerosol thermodynamics package with HETPv1.0 as a new git submodule. From the HETP README:

HETP is an aerosol thermodynamic equilibrium solver written in modern Fortran based on ISORROPIA II (which is written in FORTRAN 77). HETP solves only the 'forward' metastable state of the NH4+/Na+/Ca2+/K+/Mg2+/SO42–/NO3–/Cl–/H2O system. The main publication for HETP is avaiable online at: https://gmd.copernicus.org/preprints/gmd-2023-159/.

Note that this PR can be merged prior to updates in GEOS-Chem to use HETP without issue. However, it is required before the updates to GEOS-Chem in PR https://github.com/geoschem/geos-chem/pull/2244.

Expected changes

Preliminary 1-month full chemistry benchmarks comparing ISORROPIA with HETPv1.0 in GEOS-Chem are posted here.

Reference(s)

See https://gmd.copernicus.org/articles/17/2197/2024/gmd-17-2197-2024-discussion.html

Related Github Issue(s)