Title :
A simple interpretation of NDVI-Ts space combining LAI and evapotranspiration
Author :
Han, Lijuan ; Li, Xiaowen ; Wang, Jindi ; Liu, Shaomin ; Jiao, Ziti
Author_Institution :
Sch. of Geogr., Beijing Normal Univ.
Abstract :
The paper focuses on interpreting the different spatial relationships between NDVI and Ts, a triangular or a trapezoid, and analyzing transformation condition and the physical connotation and ecological meaning of the vegetation index-surface temperature feature space. Further, using the Temperature-Vegetation Dryness Index (TVDI), we explain the existent meaning of a triangular shape after NDVI arrives at saturated state (NDVI=1) by analyzing the relationship between NDVI, LAI and evapotranspiration. The specific relations between NDVI and Ts will help us validate and update land surface models well
Keywords :
ecology; evaporation; geophysical signal processing; hydrological techniques; hydrology; land surface temperature; vegetation mapping; LAI; NDVI; NDVI-T space; TVDI; Temperature-Vegetation Dryness Index; ecology; evapotranspiration; land surface models; spatial relationships; surface temperature; transformation condition analysis; trapezoid; triangular shape; vegetation index-surface temperature feature space; Biological system modeling; Geographic Information Systems; Land surface; Land surface temperature; Remote sensing; Shape measurement; Soil; Surface resistance; Temperature sensors; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004 IEEE International
Conference_Location :
Anchorage, AK
Print_ISBN :
0-7803-8742-2
DOI :
10.1109/IGARSS.2004.1369899
