Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029333 |
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 |
ISSN | 2169-897X |
EISSN | 2169-8996 |
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 |
推荐引用方式 GB/T 7714 | 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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