通量-方差法估算沿海近地面层的湍流通量分析

徐安伦; 吴晓庆; 许利明; 李多扬

通量-方差法估算沿海近地面层的湍流通量分析

1.
中国科学院安徽光学精密机械研究所大气光学中心, 安徽, 合肥, 230031;中国科学院研究生院, 北京, 100049
2.
中国科学院安徽光学精密机械研究所大气光学中心, 安徽, 合肥, 230031

基金项目: 中国科学院知识创新工程资助课题;国家自然科学基金资助项目(40475010)共同资助

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出版历程
- 收稿日期: 2007-06-21
- 修回日期: 2008-01-21

ANALYSIS OF FLUX-VARIANCE METHOD IN ESTIMATION OF TURBULENT FLUX IN THE SURFACE LAYER OVER COASTAL AREA

1.
Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;Graduate University of Chinese Academy of Sciences, Beijng 100049, China
2.
Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China

摘要

摘要: 利用通量-方差法,通过确定速度和温度归一化标准差与稳定度之间的变化关系,估算出东南沿海地区的湍流动量通量和感热通量。我们发现在中性条件下σ_T/T并不像Tillman等认为是常数,而是随稳定度参数按指数形式变化。与涡动协方差相关测量系统测量结果进行比较发现,通量-方差方法估算结果与测量值两者符合得较好,相关性高,动量通量的相关系数为0.87,而感热通量的为0.95。利用该方法估算沿海近地面层的湍流通量具有一定的代表性。
- 涡动相关法 /
- 通量-方差法 /
- 动量通量 /
- 感热通量
Abstract: By determining the normalized standard deviation of temperature as a function of the stability parameter with the flux-variance method,surface fluxes of momentum and sensible heat are estimated for the southeast coastal area of China.In neutral conditions the value of σ_T/T increases strongly and exponentially with increasing stability parameter.That is in disagreement with the constant value Tillman et al assume.To examine the performance of the flux-variance method,the predicted values are compared with the eddy covariance system of the measured values.The result is that the predicted fluxes of momentum and sensible heat are in good agreement with measured values.The determined coefficient is 0.75 for momentum flux and 0.95 for sensible heat flux.The simple measurements of temperature and wind speed are useful in estimating turbulent flux in both stable and unstable atmospheric surface layer.
- eddy correlation method /
- flux-variance method /
- momentum flux /
- sensible heat flux

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参考文献(14)

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