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首页> 外文期刊>Pure and Applied Geophysics >Observations and Numerical Simulations of Urban Heat Island and Sea Breeze Circulations over New York City
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Observations and Numerical Simulations of Urban Heat Island and Sea Breeze Circulations over New York City

机译：纽约市城市热岛和海风环流的观测和数值模拟

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摘要

Observations from two SOund Detection And Ranging (SODAR) units, a 10 m micrometeorological tower and five Automated Surface Observing Stations (ASOS) were examined during several synoptic scale flow regimes over New York City after the World Trade Center disaster on September 11, 2001. An ARPS model numerical simulation was conducted to explore the complex mesoscale boundary layer structure over New York City. The numerical investigation examined the urban heat island, urban roughness effect and sea breeze structure over the New York City region. Estimated roughness lengths varied from 0.7 m with flow from the water to 4 m with flow through Manhattan. A nighttime mixed layer was observed over lower Manhattan, indicating the existence of an urban heat island. The ARPS model simulated a sea-breeze front moving through lower Manhattan during the study period consistent with the observations from the SODARs and the 10-m tower observations. Wind simulations showed a slowing and cyclonic turning of the 10-m air flow as the air moved over New York City from the ocean. Vertical profiles of simulated TKE and wind speeds showed a maximum in TKE over lower Manhattan during nighttime conditions. It appears that this TKE maximum is directly related to the influences of the urban heat island.
机译：在2001年9月11日世界贸易中心灾难后，纽约市发生了数个天气尺度流向，研究人员从两个SOUND探测和测距（SODAR）单元，一个10 m的微气象塔和五个自动地面观测站（ASOS）进行了观测。进行了ARPS模型数值模拟，以探索纽约市上复杂的中尺度边界层结构。数值研究检查了纽约市地区的城市热岛，城市粗糙效应和海风结构。估计的粗糙度长度从水流0.7 m到曼哈顿水流4 m不等。在曼哈顿下城观察到夜间混合层，表明存在城市热岛。 ARPS模型模拟了在研究期间穿越曼哈顿下城的海风锋线，与SODARs的观测结果和10米塔楼观测结果一致。风力模拟显示，随着空气从海洋上空移过纽约市，10米气流的速度缓慢且呈气旋式转向。在夜间条件下，模拟的TKE和风速的垂直剖面显示曼哈顿下城的TKE最大。看来，这个TKE最大值与城市热岛的影响直接相关。

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