DOI: 10.1002/2016MS000823
Scopus记录号: 2-s2.0-85014102748
论文题名: Development and evaluation of a physics-based windblown dust emission scheme implemented in the CMAQ modeling system
作者: Foroutan H ; , Young J ; , Napelenok S ; , Ran L ; , Appel K ; W ; , Gilliam R ; C ; , Pleim J ; E
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 1 起始页码: 585
结束页码: 608
语种: 英语
英文关键词: Air quality
; Soils
; Storms
; Surface roughness
; CMAQ
; Community multi-scale air qualities
; Parameterization schemes
; Parametrizations
; Soil concentrations
; Surface roughness length
; Temporal characteristics
; Wind-blown dust
; Dust
; air quality
; concentration (composition)
; dust
; emission inventory
; implementation process
; model test
; parameterization
; performance assessment
; surface roughness
; wind forcing
; United States
英文摘要: 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 quite good agreement (normalized mean bias of 8.3%) with observations, while moderate to high underestimation of soil concentration is seen in the summertime. The latter is attributed to the issue of representing the convective dust storms in summertime. Evaluations against observations for seven elevated dust events in the SWUS indicate that the new windblown dust treatment is capable of capturing spatial and temporal characteristics of dust outbreaks. © Published 2017. This article is a U.S. Government work and is in the public domain in the USA. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75829
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Computational Exposure Division, National Exposure Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle ParkNC, United States
Recommended Citation:
Foroutan H,, Young J,, Napelenok S,et al. Development and evaluation of a physics-based windblown dust emission scheme implemented in the CMAQ modeling system[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(1)