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首页> 外文期刊>Advances in Atmospheric Sciences >Urban heat island and boundary layer structures under hot weather synoptic conditions: A case study of Suzhou City, China
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Urban heat island and boundary layer structures under hot weather synoptic conditions: A case study of Suzhou City, China

机译:天气天气条件下的城市热岛及边界层结构:以中国苏州市为例

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摘要

A strong urban heat island (UHI) appeared in a hot weather episode in Suzhou City during the period from 25 July to 1 August 2007. This paper analyzes the urban heat island characteristics of Suzhou City under this hot weather episode. Both meteorological station observations and MODIS satellite observations show a strong urban heat island in this area. The maximum UHI intensity in this hot weather episode is 2.2°C, which is much greater than the summer average of 1.0°C in this year and the 37-year (from 1970 to 2006) average of 0.35°C. The Weather Research and Forecasting (WRF) model simulation results demonstrate that the rapid urbanization processes in this area will enhance the UHI in intensity, horizontal distribution, and vertical extension. The UHI spatial distribution expands as the urban size increases. The vertical extension of UHI in the afternoon increases about 50 m higher under the year 2006 urban land cover than that under the 1986 urban land cover. The conversion from rural land use to urban land type also strengthens the local lake-land breeze circulations in this area and modifies the vertical wind speed field.
机译:2007年7月25日至8月1日,苏州市在高温天气中出现了强烈的城市热岛。本文分析了苏州市城市热岛在此高温天气下的特征。气象站观测和MODIS卫星观测均显示该地区有强烈的城市热岛。在这种炎热天气中,UHI的最大强度为2.2°C,远高于今年夏季的平均温度1.0°C和37年(1970年至2006年)的平均温度0.35°C。天气研究和预报(WRF)模型仿真结果表明,该地区的快速城市化进程将在强度,水平分布和垂直延伸方面增强UHI。 UHI空间分布随着城市规模的扩大而扩大。在2006年城市土地覆盖下,UHI的垂直延伸在下午比在1986年城市土地覆盖下增加了约50 m。从农村土地利用向城市土地类型的转换也加强了该地区当地的湖陆风流通,并改变了垂直风速场。

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