Funding for this research was provided by:
National Natural Science Foundation of China (CN) (41501233)
National Natural Science Foundation of China (CN) (41530854)
National Natural Science Foundation of China (CN) (41571130081)
National Key Project for Research and Development (2016YFC0501605)
Program for Bingwei Excellent Talents in the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences (2015RC204)