Investigation of the Stable Atmospheric Boundary Layer at Halley Antarctica
Investigation of the Stable Atmospheric Boundary Layer at Halley Antarctica
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DOI：
10.1007/s10546-013-9831-0
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发表时间：
2013-06
影响因子：
4.3
通讯作者：
J. Rodrigo;P. Anderson
中科院分区：
文献类型：
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作者：
J. Rodrigo;P. Anderson
本文分析了南极洲布伦特冰架边界层的测量结果，以确定通量廓线关系。在标准的方法中，风切变、位温梯度、Richardson数、动量和热量的涡动扩散系数、Prandtl数、混合长度和湍流动能的估计都是无扰动量。稳定大气边界层的Nieuwstadt局部标度理论似乎工作得很好，只稍微偏离中纬度地区的表达式。基于局部尺度参数实现了稳定边界层的单柱模式。基于第一个GEWEX大气边界层研究案例研究的模拟针对各种稳定性类别的整体平均剖面进行了验证。无量纲湍流动能的稳定性相关函数允许更好地拟合系综剖面。
Boundary-layer measurements from the Brunt Ice Shelf, Antarctica are analyzed to determine flux–profile relationships. Dimensionless quantities are derived in the standard approach from estimates of wind shear, potential temperature gradient, Richardson number, eddy diffusivities for momentum and heat, Prandtl number, mixing length and turbulent kinetic energy. Nieuwstadt local scaling theory for the stable atmospheric boundary-layer appears to work well departing only slightly from expressions found in mid-latitudes. An–single-column model of the stable boundary layer is implemented based on local scaling arguments. Simulations based on the first GEWEX Atmospheric Boundary-Layer Study case study are validated against ensemble-averaged profiles for various stability classes. A stability-dependent function of the dimensionless turbulent kinetic energy allows a better fit to the ensemble profiles.