国家重点基础研究发展计划No.2015CB452901;中国科学院地理科学与资源研究所"一三五"战略科技计划前沿探索项目No.2012QY001;国家自然科学基金项目No.21177126, 41201496;江苏省自然科学基金面上项目No.BK20141513 Supported by the State Key Basic Research Development Plan of China No.2015CB452901, the Exploratory Forefront Project for the Strategic Science Plan in IGSNRR, CAS No.2012QY001, the National Natural Science Foundation of China No.21177126, 41201496and the Natural Science Foundation of Jiangsu Province No.BK20141513