Dependence of near‐surface similarity scaling on the anisotropy of atmospheric turbulence
Dependence of near‐surface similarity scaling on the anisotropy of atmospheric turbulence
复制标题
近地表相似尺度对大气湍流各向异性的依赖性
DOI:
10.1002/qj.3224
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发表时间:
2018
影响因子:
8.9
通讯作者:
Calaf, Marc
中科院分区:
文献类型:
--
作者:
Stiperski, Ivana;Calaf, Marc
Turbulence data from the CASES‐99 field experiment, over comparatively horizontally homogeneous and flat terrain, are separated based on the anisotropy of the Reynolds stress tensor (into isotropic, two‐component axisymmetric and one‐component turbulence) and flux‐variance similarity scaling relations are tested. Results illustrate that different states of anisotropy correspond to different similarity relations, especially under unstable stratification. Experimental data with close to isotropic turbulence match similarity relationships well. On the other hand, very anisotropic turbulence deviates significantly from the traditional scaling relations. We examine in detail the characteristics of these states of anisotropy, identify conditions in which they occur and connect them with different governing parameters. The governing parameters of turbulence anisotropy are shown to be different for stable and unstable stratification, but are able to delineate clearly the conditions in which each of the anisotropy states occurs.
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