Study on NDVI- T s space by combining LAI and evapotranspiration |
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| Authors: | Han Lijuan Wang Pengxin Yang Hua Liu Shaomin Wang Jindi |
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| Affiliation: | (1) Research Center for Remote Sensing and GIS, School of Geography, Beijing Normal University, Beijing, 100875, China;(2) State Key Laboratory of Remote Sensing Science, Beijing, 100875, China;(3) Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities, Beijing, 100875, China;(4) Department of Information Management, College of Information and Electronic Engineering, China Agricultural University, Beijing, 100083, China |
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| Abstract: | This paper focuses on interpreting the different spatial relationships between NDVI and T s, a triangular or a trapezoid, and on analyzing transformation conditions, the physical and ecological meanings of the vegetation index-surface temperature space as well. Further, we use the Temperature-Vegetation Dryness Index (TVDI) to explain the existent meaning of a triangular space after NDVI reaches its saturated state by employing the relationships between NDVI, LAI and evapotranspiration. The specific relations between NDVI and T s are useful for describing, validating and updating land surface models. |
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| Keywords: | NDVI land surface temperature evapotranspiration leave area index |
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