the National Natural Science Foundation of China(40971221);National Key Project of Scientific and Technical Supporting Programs Funded by Ministry of Science & Technology of China(2006BAD04B01-0101);National Department Public Benefit Research Foundation(GYHY200706046);the European Commission(Call FP7-ENV-2007-1Grant No.212921)as part of the CEOP-AEGIS project(http://www.ceop-aegis.org/);the co-building projection of Beijing in China(000-105803)
Vegetation index-land surface temperature (VI-T s ) space has been widely used to estimate evapotranspiration and soil moisture. The limitation of this method is the uncertainty of the observed dry edge, which is us...