Cai, Qiufang
Liu, Yu
Wang, Yanchao
Ma, Yongyong
Liu, Han
Funding for this research was provided by:
National Natural Science Foundation of China (41171170)
CAS "Light of west China" program
the National Basic Research Program of China (2013CB955903)
the State Key Laboratory of Loess and Quaternary foundation (SKLLQG)