The Characteristics of the Chicago Lake Breeze and Its Effects on Trace Particle Transport: Results from an Episodic Event Simulation
The Characteristics of the Chicago Lake Breeze and Its Effects on Trace Particle Transport: Results from an Episodic Event Simulation
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DOI：
10.1175/jam2301.1
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发表时间：
2005-11
期刊：
影响因子：
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通讯作者：
L. Harris;V. Rao Kotamarthi
中科院分区：
文献类型：
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作者：
L. Harris;V. Rao Kotamarthi
夏季在密歇根湖上空形成的湖风环流在几个方面影响了伊利诺伊州芝加哥的大都市地区的天气。尤其重要的是，环流对城市内外产生的臭氧和气溶胶等污染物的扩散产生了影响。为了研究这些影响，第五代宾夕法尼亚州立大学-国家大气研究中心中尺度模式(MM5)被用来对两次湖风事件进行数值模拟-一次发生在1999年7月，另一次发生在2002年7月。模型运行用芝加哥地区周围几个地点的数据进行了验证。模拟的微风环流降低了气温上升的速度，同时穿透内陆约12公里，持续约8小时，与观测结果合理一致。此外，内陆侵彻距离与锋面内最大垂直速度的强度有关。粒子运动轨迹和输运的计算。
Abstract The lake-breeze circulation that forms over Lake Michigan during the summer influences the Chicago, Illinois, metropolitan area’s weather in several ways. Of particular significance is the circulation’s effect on the dispersion of pollutants such as ozone and aerosols produced in and around the city. To investigate these effects, the fifth-generation Pennsylvania State University–National Center for Atmospheric Research Mesoscale Model (MM5) was used to perform numerical simulations for two lake-breeze events—one in July 1999 and another in July 2002. The model runs were verified with data from several locations around the Chicago area. The simulated breeze circulation decreased the rate of increase in air temperature while penetrating roughly 12 km inland and lasting about 8 h, in reasonable agreement with observations. Furthermore, the inland penetration distance was related to the strength of the maximum vertical velocity within the front. Calculations of trajectories and transport of particle...