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

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 co

SUBMITTER: Foroutan H 

PROVIDER: S-EPMC6145470 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature