WIND PROFILES AND ROUGHNESS LENGTHS OVER BEIJING CITY
WIND PROFILES AND ROUGHNESS LENGTHS OVER BEIJING CITY
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Meichun Cao;Zhaohui Lin;Y. Shao;Aiguo Li
中科院分区：
文献类型：
--
作者：
Meichun Cao;Zhaohui Lin;Y. Shao;Aiguo Li
利用北京325m气象塔的全年资料，研究了北京某城市景观的粗糙度长度和风廓线及其与地面几何特征的关系。初步结果表明，在速度分布中可以看到明显的从粗糙到光滑的过渡。此外，63m以上的风向分布密集，盛行风来自西北和西南风，而低于63m的风向则表现出强烈的无序。最后，从下部剖面得到的粗糙度长度与当地地表特征有很好的响应，它们的取值一般在500米半径范围内。
Roughness lengths and wind profiles over an urban landscape in Beijing, China and their relationship with surface geometric features have been investigated by utilizing a whole-year Beijing 325-m Meteorological Tower data. Preliminary results show that a clear rough-to-smooth transition can be seen in the velocity profile. In addition, wind directions above 63 m are densely distributed with the prevailing winds coming from northwest and southwest, while those below are strongly disordered. Finally, roughness lengths derived from the lower profiles respond well to local surface characteristics and their fetches are generally within an area of 500-m radius.