邹钧,孙鉴泞,刘罡.城市近地层湍流特征分析.气象科学,2011,(4):525-533 ZOU Jun,SUN Jianning,LIU Gang.Turbulence characteristics in the urban surface layer.Journal of the Meteorological Sciences,2011,(4):525-533
城市近地层湍流特征分析
Turbulence characteristics in the urban surface layer
投稿时间:2011-05-24  
DOI:10.3969/2012jms.00**
中文关键词:  湍流特征  城市冠层  粗糙子层  惯性子层  局地相似
英文关键词:Turbulence characteristics  Urban Canopy  Roughness sublayer  Inertial sublayer  〖KG*2〗Local similarity theory
基金项目:国家重点基础研究发展计划(973计划)资助项目(2010CB428501).
作者单位
邹钧 南京大学大气科学学院南京210093 
孙鉴泞 南京大学大气科学学院南京210093 南京大学气候与全球变化研究院南京210093 
刘罡 南京大学大气科学学院南京210093 
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中文摘要:
      利用中国科学院大气物理研究所在北京的325 m铁塔观测资料,本文分析了47、140和280 m三个高度的湍流统计特征。结果表明,城市近地层的湍流速度方差和湍流温度方差都较好地满足局地相似关系,140 m和280 m的湍流特征非常接近,而47 m的湍流特征与之相比表现出明显的差异,说明由于城市冠层动力和热力非均匀性的影响,粗糙子层和惯性子层的湍流特性不同,其相应的参数化方案也应该不同。
英文摘要:
      Observational data from Beijing 325 m meteorological tower are used to investigate the turbulence characteristics in the urban surface layer. The turbulent variances at three levels of 47 m, 140 m and 280 m heights are analyzed in the frame of the local similarity theory. The results show that the variances of wind velocity and temperature can be quite well described by the local similarity theory. However, the comparison shows that the turbulence characteristics at 140 m and 280 m heights are close to each other, while the turbulence characteristics at 47 m height are different from them. These results indicate that, since the turbulence properties in the roughness sublayer are strongly influenced by the dynamical and thermal heterogeneity of urban canopy, they are different to those in the inertial sublayer. And the turbulence statistics in the roughness sublayer and the inertial sublayer should be described by the different schemes.
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