The correct simulation of pollutant dispersion in coastal regions demands understanding the turbulence structure of the thermal internal boundary layer (TIBL), which typically occurs in daytime when maritime air is advected over the continent. Such a structure is investigated using 10 levels of turbulence observations made at a 140-m micrometeorological mast installed at 3500 m from the shoreline in south-eastern Brazil, with TIBL dimensionless vertical profiles of the turbulence parameters commonly used in Lagrangian and Eulerian dispersion models determined. To accomplish that, the TIBL height zi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$z_i$$\end{document} is estimated using a vertical-flux-convergence approach, developed here. The values experimentally obtained for zi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$z_i$$\end{document} agree with those predicted by a widely-used model for TIBL growth. In general, the normalized turbulent profiles evaluated for the TIBL differ from those previously obtained in the convective boundary layer (CBL). The horizontal eddy diffusivities evaluated for the TIBL are larger than those typically observed in the CBL, while the vertical ones are similar for both boundary layers. Finally, it is shown that CBL similarity relationships can be used to describe turbulent parameters as long as the proper empirical constants are used.

中文翻译：

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热内边界层中湍流参数的垂直剖面

沿海地区污染物扩散的正确模拟需要了解热内边界层 (TIBL) 的湍流结构，这通常发生在白天海洋空气在大陆上空平流时。使用在距离巴西东南部海岸线 3500 米处安装的 140 米微气象桅杆上进行的 10 级湍流观测来研究这种结构，并确定了拉格朗日和欧拉弥散模型中常用的湍流参数的 TIBL 无量纲垂直剖面. 要做到这一点，TIBL 高度 zi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{ \oddsidemargin}{-69pt} \begin{document}$$z_i$$\end{document} 使用此处开发的垂直通量收敛方法估计。zi\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \ 实验获得的值setlength{\oddsidemargin}{-69pt} \begin{document}$$z_i$$\end{document} 与广泛使用的 TIBL 增长模型预测的一致。一般来说，为 TIBL 评估的归一化湍流剖面不同于先前在对流边界层 (CBL) 中获得的那些。为 TIBL 评估的水平涡扩散系数大于在 CBL 中通常观察到的那些，而两个边界层的垂直扩散系数相似。最后，表明只要使用适当的经验常数，CBL 相似关系可用于描述湍流参数。