An Observational and Modeling Study of Characteristics of Urban Heat Island and Boundary Layer Structures in Beijing
An Observational and Modeling Study of Characteristics of Urban Heat Island and Boundary Layer Structures in Beijing
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DOI：
10.1175/2008jamc1909.1
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发表时间：
2009-03
影响因子：
3
通讯作者：
Shiguang Miao;Fei Chen;M. Lemone;M. Tewari;Qing-chun Li;Yingchun Wang
中科院分区：
文献类型：
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作者：
Shiguang Miao;Fei Chen;M. Lemone;M. Tewari;Qing-chun Li;Yingchun Wang
摘要利用常规和中分辨率成像光谱仪（MODIS）观测资料，分析了北京地区城市热岛和边界层结构的特征。天气研究和预报（WRF）模式耦合一个单层的城市冠层模式（UCM）被用来模拟这些城市的天气特征与观测比较。WRF还用于测试模式模拟对不同城市土地利用情景和城市建筑结构的敏感性，以调查城市化对地面天气和边界层结构的影响。结果表明，WRF/Noah/UCM耦合模式能够较好地模拟北京城市热岛强度的日变化、城市热岛的空间分布、风速和风向的日变化以及山谷环流与城市热岛的相互作用、小尺度边界层对流、城市热岛强度的日变化、城市热岛强度的日变化以及城市热岛与山谷环流的相互作用。
Abstract In this paper, the characteristics of urban heat island (UHI) and boundary layer structures in the Beijing area, China, are analyzed using conventional and Moderate Resolution Imaging Spectroradiometer (MODIS) observations. The Weather Research and Forecasting (WRF) model coupled with a single-layer urban canopy model (UCM) is used to simulate these urban weather features for comparison with observations. WRF is also used to test the sensitivity of model simulations to different urban land use scenarios and urban building structures to investigate the impacts of urbanization on surface weather and boundary layer structures. Results show that the coupled WRF/Noah/UCM modeling system seems to be able to reproduce the following observed features reasonably well: 1) the diurnal variation of UHI intensity; 2) the spatial distribution of UHI in Beijing; 3) the diurnal variation of wind speed and direction, and interactions between mountain–valley circulations and UHI; 4) small-scale boundary layer conv...