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Advances in Earth Science  2011, Vol. 26 Issue (12): 1260-1268    DOI: 10.11867/j.issn.1001-8166.2011.12.1260
Estimating Terrestrial Ecosystems Evapotranspiration: A Review on Methods of Integrateing Remote Sensing and Ground Observations
Yu Tengfei1,Feng Qi1,2,Si Jianhua2,Xi Haiyang2,Chen Lijuan2
1.Research School of Arid Environment & Climate Change, Lanzhou University, Lanzhou 730000, China;
2.Cold and Arid Region Environmental and Engineering Research Institute,  Chinese Academy of Sciences, Alashan Desert Eco-hydrology Experimental Research Station, Lanzhou 730000, China
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Generally, the two basic study ways to complete the estimate of terrestrial ecosystems evapotranspiration, ground observation and remote sensing simulation have  their own advantages and disadvantages and are complementary to each other. Therefore, how to extend the surface flux (e.g. latent heat flux) from ground observations to large scale (regional and global scale) through combining remote sensing and ground observations has become a scientific focus. In view of this, we review the four aspects of progress based on this research ideas: ① simple empirical regression model; ② surface energy balance methods; ③land surface process model; ④ land data assimilation, and discuss  the main problems currently and possible solutions.

Key words:  Evapotranspiration      Terrestrial ecosystems      Ground observations      Remote sensing     
Received:  21 April 2011      Published:  10 December 2011
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Yu Tengfei,Feng Qi,Si Jianhua,Xi Haiyang,Chen Lijuan. Estimating Terrestrial Ecosystems Evapotranspiration: A Review on Methods of Integrateing Remote Sensing and Ground Observations. Advances in Earth Science, 2011, 26(12): 1260-1268.

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