Author Affiliations +
Qiuhao Huang,* Yunlong Cai,** Xiaoshi Xing***
*Qiuhao Huang CIESIN Columbia University 61 Route 9W PO Box 1000 Palisades, NY 10964, USA qiuhao.huang@gmail.com
**Yunlong Cai Department of Resources, Environment and Geography College of Urban and Environmental Sciences Peking University, Beijing 100871, China caiyl@urban.pku.edu.cn
***Xiaoshi Xing CIESIN Columbia University 61 Route 9W PO Box 1000 Palisades, NY 10964, USA xxiaoshi@ciesin.columbia.edu