Articles | Volume 14, issue 1
Geosci. Model Dev., 14, 473–493, 2021
https://doi.org/10.5194/gmd-14-473-2021
Geosci. Model Dev., 14, 473–493, 2021
https://doi.org/10.5194/gmd-14-473-2021

Development and technical paper 25 Jan 2021

Development and technical paper | 25 Jan 2021

Improving dust simulations in WRF-Chem v4.1.3 coupled with the GOCART aerosol module

Alexander Ukhov et al.

Model code and software

Merra2BC. Interpolation utility for boundary and initial conditions used in WRF-Chem A. Ukhov and G. Stenchikov https://doi.org/10.5281/zenodo.3695911

A description of the Advanced Research (WRF) model, Version 3 W. C. Skamarock, J. B. Klemp, J. Dudhia, D. O. Gill, D. Barker, M. Duda, X. Y. Huang, W. Wang, and J. G. Powers https://github.com/wrf-model/WRF

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Short summary
We discuss and evaluate the effects of inconsistencies found in the WRF-Chem code when using the GOCART module. First, PM surface concentrations were miscalculated. Second, dust optical depth was underestimated by 25 %–30 %. Third, an inconsistency in the process of gravitational settling led to the overestimation of dust column loadings by 4 %–6 %, PM10 by 2 %–4 %, and the rate of gravitational dust settling by 5 %–10 %. We also presented diagnostics that can be used to estimate these effects.