On the self-ventilation of an urban heat island

被引：6

作者：

Gross, Guenter ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Meteorol & Klimatol, Herrenhauser Str 2, D-30419 Hannover, Germany

来源：

METEOROLOGISCHE ZEITSCHRIFT | 2019年 / 28卷 / 01期

关键词：

urban rural measurements; urban heat island; urban wind speed; NUMERICAL-SIMULATION;

D O I：

10.1127/metz/2019/0961

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Measurements of a new German Meteorological Service urban observation network in Hannover were used to analyse the urban heat island (UHI) and the dynamics of urban wind. The UHI was well pronounced on many nights of the year and had a maximum intensity during the observation period of more than 6 K. A strong correlation between the UHI intensity and wind speed difference between the urban and the rural station was found. During the night, wind speed inside the city was significantly higher than in the surrounding rural area for an increasing air temperature contrast. This effect was attributed to the weaker thermal stability inside the city when there was a well-developed heat island, which enhanced the turbulent momentum flux from above.

引用

页码：87 / 92

页数：6

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