YUAN Feng1; 2; WEI Yehua Dennis3; CHEN Wen1; JIN Zhifeng1 (1. Nanjing Institute of Geography and Limnology; CAS; Nanjing 210008; China; 2. Graduate University of Chinese Academy of Sciences; Beijing 100039; China; 3. Department of Geography and IPIA; University of Utah; Salt Lake City; Utah 84112-9155; USA)
