Acknowledgement

This study was supported by National Key Research and Development Program of China (Grant No. 2016YFC0401005, 2016YFA0601703) and Nation Nature Science Foundation of China (Grant No. 91847301, 92047203, 42075191, 52009080). Acknowledgement for the data support form “National Earth System Science Data Center, National Science & Technology Infrastructure of Chia. (http://www.geodata.cn)”