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大气科学  2002 

北京城市下垫面边界层湍流统计特征

DOI: 10.3878/j.issn.1006-9895.2002.02.09

Keywords: 城市下垫面,湍流,感热通量,北京

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Abstract:

分析了1998年10月在北京325m气象塔47m、120m及280m3层取得的湍流资料,讨论了湍流宏观统计特征量等随稳定度变化的规律.结果表明,47m及120m观测到的感热通量的日变化基本一致,城市边界层中近地层高度可达100m左右,这主要是由于下垫面粗糙度很大所致.同时发现当冷空气来临时,边界层中的感热通量会有明显增大.

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