显热通量密度的涡度相关法测量与空气动力学粗糙度参数估计模型

显热通量密度的涡度相关法测量与空气动力学粗糙度参数估计模型

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Initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Method-focused categoriesProcess-perspectivePhysical process calculation

Model Description

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显热通量密度的涡度相关法测量与空气动力学粗糙度参数估计模型

 

(1)    显热通量密度的涡度相关法测量:

一维涡度相关方法可定出垂直动的显热通量密度():

 

 

式中,是空气密度;是空气的定压热容量;分别是垂直方向上的平均风速和空气温度的瞬时偏离;上横杠表示对偏离值乘积进行时间平均。

 

(2)    用能量平衡波文比方法测量蒸发通量密度

 

蒸发通量密度()可用下式计算:

 

 

式中,是净辐射;是土壤热量通量密度;是蒸发热;是波文化。

 

 

式中,是干球空气温度;是定量湿度;下标21分别表示干湿温度计的上限值和下限值。

 

(3)    空气动力学粗糙度参数估计:

在近中性条件下,平均水平风速可设为:

 

 

式中,是表面上空惯性层中的高度;是摩擦速度,是表面切应力;是无量纲von Karman常数;是动量的粗糙长度;是零平面位移高度。

 

Monin-Obukhov稳定性参数可表示为:

 

 

式中,是参考高度;而Obukhov稳定性长度,且定义为:

 

 

式中,是重力加速度;是在高度处的空气温度;是水蒸气通量密度。

 

参考文献:

MatthiasA DKustas W PGayL W et al:玉米幼苗及垄状土壤组成的植被稀疏粗糙表面的空气动力学参数。Remote Sensing of Environment199032

How to Cite

《资源环境数学模型手册》 (2018). 显热通量密度的涡度相关法测量与空气动力学粗糙度参数估计模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/e152d6e2-f078-4c03-aad5-cab1cb87e0fd
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Last modifier : 
Anxun Ren
Last modify time : 
2020-11-18
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Contributor

Initial contribute: 2018-12-04

Co-contributor(s)

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feedback

History

Last modifier : 
Anxun Ren
Last modify time : 
2020-11-18
Modify times : 
View History

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