Ruijian Gou, Laoshan National Laboratory, Qingdao, China, Yanni Wang, The Sino-Australian Research Consortium for Coastal Management, School of Science, UNSW Canberra, Canberra, ACT, Australia, Canberra, Australia, Gerrit Lohmann, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, Niklas Boers, Ecole Normale Supérieure Paris, Paris, France, Deliang Chen, Tsinghua University, Department of Earth System Science, Beijing, China, Xiaopei Lin, Ocean University of China, Qingdao, China, Xiao Hua Wang, UNSW Canberra, Canberra, Australia, Wenju Cai, Laoshan Laboratory, Qingdao, China, Jurgen Kurths, Potsdam Institute, Potsdam, Germany, Johan Rockström, Stockholm University, Stockholm Resilience Centre, Stockholm, Sweden, Stefan Rahmstorf, Potsdam Institute for Climate Impact Research, Potsdam, Germany, Jingfang Fan, Beijing Normal University, Beijing, China, Chao Li, University of California, Riverside, United States and Lixin Wu, Ocean University of China, Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Physical Oceanography, Qingdao, China