DEPENDENCIES OF PROFILES OF TURBULENT FLUXES ONATMOSPHERIC STABILITY IN AN URBAN SURFACE LAYER
DEPENDENCIES OF PROFILES OF TURBULENT FLUXES ONATMOSPHERIC STABILITY IN AN URBAN SURFACE LAYER
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城市地表层湍流通量分布与大气稳定性的相关性
DOI：
10.2208/prohe.47.1
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Y. Kimoto
中科院分区：
文献类型：
--
作者：
R. Moriwaki;M. Kanda;Y. Kimoto
为了研究大气稳定度（z '/L）的配置文件的依赖关系，进行了现场测量的风速，温度和湍流通量和以上密集的住宅冠层。1)风速垂直廓线随（z ′/L）变化。在不稳定条件下，它偏离了传统的相似函数。2)动量通量随高度缓慢减小。这种趋势在不稳定条件下更为显著。3)冠层上方的u偏度大于植被研究中报道的值。4)逆温层是在日出前后，由于屋顶附近空气的局部加热而在冠层内形成的。5)不稳定条件下位温梯度与大气稳定度有关，但比常规相似函数的位温梯度大。6)热粗糙子层的范围小于动量粗糙子层的范围。
To investigate the dependencies of the profiles on the atmospheric stability (z'/L), field measurements were carried out for wind velocity, temperature and turbulent fluxes in and above a dense residential canopy. 1) The vertical profile of wind velocity varies with (z'/L). It deviates from the conventional similarity function in the unstable condition. 2) Momentum flux slowly decrease with height. This tendency is more significant in the unstable condition. 3) Skewness of u above the canopy is larger than the value reported in the vegetation studies. 4) Inversion layer is formed within the canopy around the sunrise due to the local heating of air near the roof top. 5) The gradient of potential temperature under unstable condition is dependent on the atmospheric stability but is relatively larger than the one of the conventional similarity function. 6) The range of roughness sub-layer for heat is smaller than the one for momentum.