Development and evaluation of a physics-based windblown dust emission scheme implemented in the CMAQ modeling system

Journal of Advances in Modeling Earth Systems
Hosein ForoutanJonathan E Pleim

Abstract

A new windblown dust emission treatment was incorporated in the Community Multiscale Air Quality (CMAQ) modeling system. This new model treatment has been built upon previously developed physics-based parameterization schemes from the literature. A distinct and novel feature of this scheme, however, is the incorporation of a newly developed dynamic relation for the surface roughness length relevant to small-scale dust generation processes. Through this implementation, the effect of nonerodible elements on the local flow acceleration, drag partitioning, and surface coverage protection is modeled in a physically based and consistent manner. Careful attention is paid in integrating the new windblown dust treatment in the CMAQ model to ensure that the required input parameters are correctly configured. To test the performance of the new dust module in CMAQ, the entire year 2011 is simulated for the continental United States, with particular emphasis on the southwestern United States (SWUS) where windblown dust concentrations are relatively large. Overall, the model shows good performance with the daily mean bias of soil concentrations fluctuating in the range of ±1 μg m-3 for the entire year. Springtime soil concentrations are in q...Continue Reading

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Citations

Jun 12, 2019·Journal of the Air & Waste Management Association·Melissa DayVenkatesh Rao
Jan 25, 2018·Journal of the Air & Waste Management Association·Volker MatthiasMarkus Quante
Jul 3, 2018·Journal of Advances in Modeling Earth Systems·Hosein Foroutan, Jonathan E Pleim
Jul 3, 2018·Atmospheric Chemistry and Physics·Havala O T PyeAllen H Goldstein
Jan 1, 2017·Geoscientific Model Development·K Wyat AppelJeffrey O Young
Apr 23, 2019·Journal of Advances in Modeling Earth Systems·Patrick C CampbellTanya L Spero
Dec 3, 2020·Frontiers in Microbiology·Nojood A AalismailCarlos M Duarte
Mar 17, 2021·Environmental Science & Technology·T Nash SkipperArmistead G Russell

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Software Mentioned

AQS
Atmospheric Model Evaluation Tool ( AMET )
IMPROVE
CONUS
CMAQ
Chem
MADIS

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