The 2021 International Workshop on Surface-Earth System Science was hold both online and offline in Tianjin from 26-29 September with the theme of "The Surface Earth System and the sustainable development". Hosted by the School of Earth System Science (SESS in short) of Tianjin University, the workshop brought nearly 200 participants home and abroad to explore the surface earth system and the sustainable development. 13 academicians/fellows from 6 countries and 21 distinguished scientists from Peking University, Hong Kong Polytechnic University, City University of Hongkong, Tongji University and Chinese Academy of Sciences etc. were invited to give a talk covering 3 frontier topics in the area of surface-earth system science. 4 poster sessions were added to encourage academic exchange with young scholars and students.
