能量通量模型

能量通量模型

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
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Method-focused categoriesData-perspectiveRemote sensing analysis

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Chinese {{currentDetailLanguage}} Chinese

能量通量模型

 

式中,下标分别表示冠层和土壤表面;分别是潜热和显热通量;是植物冠层上方空气的温度和水蒸气压;分别是叶片和土壤的温度;符号分别代表冠层上方的空气、叶边界层和土壤表面边界层对水蒸气和显热运输的空气动力学阻率;是空气的体积热容量;是湿度计常数;分别是冠层内、叶表面的空气及土壤表面的空气的水蒸气压;是冠层空气的温度。

(1)    冠层和土壤表面的能量平衡方程为:

式中,分别是植物冠层和土壤表面的净辐射;是土壤热通量。

一个将总的净辐射分为的简单方法为Norman等人提出的方法的修正形式,其考虑了不同太阳天顶角时净辐射的消光效应:

式中,适用于较大的太阳天顶角;是叶面积指数;是太阳天顶角。

(2)    绿色植物叶片的潜热通量可根据分配到植物冠层上的净辐射加以估计:

式中,Prietley-Taylor系数;是绿色叶片的比例;是温度饱和水蒸气压曲线的斜率。

(3)    土壤蒸发率可用下式估计:

式中,是邻近土壤水分的空气的相对湿度;是地表层对水蒸气传输的阻率。

 

参考文献:

Kustas W PZhan XSchmugge T J:组合光学遥感及微波遥感方法获取半干旱流域的能量通量图。RemoteSensing of Environment1998,64

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How to Cite

《资源环境数学模型手册》 (2018). 能量通量模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/afce1a22-dd74-43d4-862a-00fc980a6c76
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Last modifier : 
Anxun Ren
Last modify time : 
2020-11-07
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Contributor(s)

Initial contribute: 2018-12-04

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 : 
2020-11-07
Modify times : 
View History

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