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大气科学  2009 

湍流通量参数化方案的非迭代方法研究

DOI: 10.3878/j.issn.1006-9895.2009.04.10

Keywords: 湍流通量参数化,非迭代,稳定度参数,整体理查森数,回归分析,粗糙度长度

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Abstract:

基于H?gstr?m(1996)和Beljaarsetal.(1991)的研究工作,沿用Louisetal.(1982)和Launiainen(1995)的思路,本文采用多元回归分析方法,研发了一种采用非迭代方法的湍流通量参数化方案。该方案直接用整体理查森数、空气动力学粗糙度长度和热力学粗糙度长度对稳定度参数进行参数化,从而避免了通过循环迭代计算Monin-Obukhov长度。该方案不仅有效地节省了CPU计算时间,而且其计算结果与迭代方案(BHH方案)的计算结果非常接近。

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