首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >OBSERVATIONS AND LARGE-EDDY SIMULATION MODELING OF FOOTPRINTS IN THE LOWER CONVECTIVE BOUNDARY LAYER
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OBSERVATIONS AND LARGE-EDDY SIMULATION MODELING OF FOOTPRINTS IN THE LOWER CONVECTIVE BOUNDARY LAYER

机译:下对流边界层中脚印的观测和大涡模拟模型

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Scalar source footprint predictions inside and above the unstable surface layer are performed using a large-eddy simulation (LES) model. LES footprint results were evaluated against a tracer field experiment at one level and against other models beyond the 10 m measurement level in the surface layer. This paper further reports on an extension of the range over which current footprint models can be used by presenting LES calculations of flux mapping to the downwind region from the source location beyond the surface layer. Our LES flux mapping results show a gradual decoupling with increasing distance from the surface. Our results also indicate that the footprints, cumulative fluxes, and concentration distributions calculated using LES in unstable conditions are in general agreement with field observations and with those of other models. The present work shows promise for the use of LES as a tool to model more complex footprint cases such as those over heterogeneous surfaces. [References: 29]
机译:使用大涡模拟(LES)模型执行不稳定表面层内部和上方的标量源足迹预测。相对于示踪剂现场实验,在一个层面上对LES足迹结果进行了评估,并在表层中对超出10 m测量层面的其他模型进行了评估。本文进一步介绍了可以通过使用LES计算通量映射的LES范围来扩展范围,该通量LES计算是从表层以外的源位置到顺风区域的。我们的LES通量映射结果显示,随着距表面距离的增加,梯度会逐渐解耦。我们的结果还表明,在不稳定条件下使用LES计算的足迹,累积通量和浓度分布与现场观测以及其他模型的观测结果总体上是一致的。目前的工作表明有望将LES用作建模更复杂的足迹案例(例如异质表面上的案例)的工具。 [参考:29]

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