Articles | Volume 14, issue 1
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, Ravan Ahmadov, Georg Grell, and Georgiy Stenchikov

Model code and software

Merra2BC. Interpolation utility for boundary and initial conditions used in WRF-Chem A. Ukhov and G. Stenchikov

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

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.