GSTDTAP  > 气候变化
DOI10.1029/2018JD029333
Momentum Drag Effect Over Urbanized Areas in the ACM2 PBL Component of the WRF model
Dy, C. Y.1; Fung, J. C. H.1,2; Pleim, Jonathan3
2019-04-27
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2019
卷号124期号:8页码:4460-4476
文章类型Article
语种英语
国家Peoples R China; USA
英文摘要

Mesoscale meteorology models, such as theWeather Research and Forecasting (WRF) model, typically use land use categorization data to specify surface characteristics by grid cells. In commonly used land use schemes, such as the 24-class U. S. Geological Survey land use classification system or the Moderate Resolution Imaging Spectroradiometer landcover product, cities are placed in single urban categories that are characterized by a high roughness length. Monin-Obunkov similarity theory is commonly used to simulate boundary layer dynamics based on surface energy and momentum fluxes which resulted in an overprediction of wind speed in weather forecasts for urban areas. It is thus crucial to include the momentum drag effects of the buildings, including walls and roofs, in the prediction models. The WRF model contains several momentum flux parameterizations, including the single-layer urban canopy model, building effect parameterization, and building energy model. The building energy model and building effect parameterization schemes are limited to the Mellor-Yamada-Janjic or BouLac planetary boundary layer models and are computationally costly. In this study, a realistic multilayer urban approach is introduced into the Asymmetric Convective Model version 2 planetary boundary layer component of the WRF model. Sensitivity tests are applied to a range of urban morphological parameters in idealized simulations, and the impact of building morphology on atmospheric conditions is examined. The modified Asymmetric Convective Model version 2 is implemented in two real cases in the forecast mode, resulting in significant improvements in wind speed prediction.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000469071400012
WOS关键词ATMOSPHERIC BOUNDARY-LAYER ; NONLOCAL CLOSURE-MODEL ; PARAMETERIZATION
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/182468
专题气候变化
作者单位1.Hong Kong Univ Sci & Technol, Dept Math, Hong Kong, Peoples R China;
2.Hong Kong Univ Sci & Technol, Div Environm & Sustainabil, Hong Kong, Peoples R China;
3.US EPA, Atmospher Modeling & Anal Div, ORD NERL, Res Triangle Pk, NC 27711 USA
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Dy, C. Y.,Fung, J. C. H.,Pleim, Jonathan. Momentum Drag Effect Over Urbanized Areas in the ACM2 PBL Component of the WRF model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(8):4460-4476.
APA Dy, C. Y.,Fung, J. C. H.,&Pleim, Jonathan.(2019).Momentum Drag Effect Over Urbanized Areas in the ACM2 PBL Component of the WRF model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(8),4460-4476.
MLA Dy, C. Y.,et al."Momentum Drag Effect Over Urbanized Areas in the ACM2 PBL Component of the WRF model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.8(2019):4460-4476.
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