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| Progress of regional land surface evapotranspiration research based on 3S technology |
| Liu Zhihong1,2,3,Liu Wenzhao1,Li Rui1 |
| 1.Research Centre of Soil and Water Conservation & Eco-enviroment,CAS,712100,Yangling,Shaanxi;2.Urumqi Meteorological Satellite Ground Station,National Satellite Meteorological Center,830011,Urumqi;3.Graduate School of CAS,100049,Beijing: China |
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Abstract Regional land surface evapotranspiration research based on 3S technology has become a main(research) direction for there large space,dynamic and easy mapping features.A review is discussed about its theoretical foundation,measurements,models,parameters,and temporal-spatial scaling,and also focuses on some existing problems,such as regional land surface evapotranspiration modeling,its parameters accuracy and the temporal-spatial scale transformation.It is concluded building models based on the physical background and the simulation of energy and material exchange in SPAC and using the RS technology to establish key(parameters) would be a trend.On the other hand,combining with 3S technologies and multiple data sources((remote) sensing and DEM data) will reduce non-remote sensing parameters,improve the accuracy of the(retrieved) parameters and temporal-spatial scaling.Further more,it would work on the land surface heterogeneous effect in the field of regional evapotranspiration.
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Received: 14 July 2005
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