The heat flux and the temperature gradient in the lower atmosphere
The heat flux and the temperature gradient in the lower atmosphere
复制标题
低层大气中的热通量和温度梯度
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
C. Meneveau
中科院分区:
文献类型:
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作者:
C. Higgins;M. Parlange;C. Meneveau
Most parameterizations used in Large Eddy Simulations of the atmospheric boundary layer are based on the assumption that subgrid‐scale fluxes are aligned against spatial gradients of transported quantities (down‐gradient closures). Based on field experiments, we determine the distribution and most probable relative orientations of the subgrid‐scale (SGS) heat flux relative to parameterizations based on the temperature gradient. We show that, under neutral and unstable atmospheric stability, the SGS heat flux most likely lies within the geometric span of the so called mixed tensor eddy diffusivity model.