Resources and Environment Department;
Xinjiang University/Key Laboratory of Oasis Ecology;
Ministry of Education;
Urumqi 830046;
P.R. China;
Graduate School;
Xinjiang University;
Urumqi 830046;
P.R. China;
Department of Earth Sciences;
The University of Memphis;
TN 38152;
USA;
State Key Laboratory of Remote Sensing Science;
Institute of Remote Sensing Applications;
Chinese Academy of Sciences;
Beijing100101;
P.R. China;