植被指数温度(VIT)梯形模型

植被指数温度(VIT)梯形模型

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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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Geography SubjectGIScience & Remote SensingGround Feature Spectrum

Detailed Description

植被指数/温度(VIT)梯形模型

   1)对完全覆盖,水分充足的植被:

 

2)对完全覆盖,但水分缺乏的植被:

 3)对水分饱和的裸地,这里冠层阻力rc=0

 

      (4)对干燥裸地,rc=∞(等价于气孔完全关闭):

   

式中,cv为空气的体积热容量;Δ为饱和水蒸气压与温度曲线的斜率;γ为湿度计常数;G为土壤热通量密度;H为显热通量密度;ra为空气动力学阻力;rcx为最大冠层阻力,与气孔近完全关闭相关;rcp为处于潜在蒸发蒸腾率时冠层阻力;Rn为净辐射热通量密度;Ta为空气温度;Ts为表面复合温度(农作物叶面温度与土壤表面温度的加权平均);VDP为空气温度为(Tc+Ta/2时水蒸气的压差;

     5)水分差额指数(WDI)可表示为:

式中,下标mxr分别对应最小值、最大值和实测值。

参考文献

   Moran M S,Clarke T R,InoueY et al:利用表面-空气温度与谱植被指数的关系估计农作物水分的差额。Remote Sensing of Environment199449

How to cite

《资源环境数学模型手册》 (2018). 植被指数温度(VIT)梯形模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/6451766f-aaf5-4bab-b370-f9e9ab28b4b4
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Contributor

contributed at 2018-12-04

Authorship

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

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