Flux‐profile relation with roughness sublayer correction
Flux‐profile relation with roughness sublayer correction
复制标题
通量分布与粗糙度子层校正的关系
DOI：
10.1002/qj.2426
复制
发表时间：
2015
影响因子：
8.9
通讯作者：
Hans Bergström
中科院分区：
文献类型：
--
作者：
J. Arnqvist;Hans Bergström
众所周知，在森林地区使用莫宁-奥布霍夫相似理论计算动量通量会低估通量。为了增加湍流通量的大小，已经提出了对标准通量分布表达式进行修正的几种建议。本文的目的是为冠层和表面层（包括粗糙度子层）内的流动特征找到一种简单的分析表示。基于将粗糙度子层校正的形状与森林特征联系起来的愿望，提出了一种新形式的粗糙度子层校正。当需要简单快速的估计时，新的通量-剖面关系可用于查找通量或风廓线，例如中尺度建模、标量传输模型或声音传播模型。
Calculation of momentum flux using Monin–Obukhov similarity theory over forested areas is well known to underestimate the flux. Several suggestions of corrections to the standard flux‐profile expression have been proposed in order to increase the magnitude of turbulent flux. The aim of this article is to find a simple, analytical representation for the characteristics of the flow within the canopy layer and the surface layer, including the roughness sublayer. A new form of the roughness sublayer correction is proposed, based on the desire to connect the shape of the roughness sublayer correction to forest characteristics. The new flux‐profile relation can be used to find the flux or the wind profile whenever simple and fast estimations are needed, as for mesoscale modelling, scalar transport models, or sound propagation models.