Wenju Cai, Centre for Southern Hemisphere Oceans Research (CSHOR), CSIRO Oceans and Atmosphere, Hobart, VIC, Australia, Guojian Wang, Centre for Southern Hemisphere Oceans Research (CSHOR), CSIRO Oceans and Atmosphere, Hobart, Australia, Agus Santoso, Australian Research Council (ARC) Centre of Excellence for Climate Extremes, Level 4 Mathews Building, The University of New South Wales, Sydney, NSW, Australia, Lixin Wu, Ocean University of China, Qingdao, China, Boris Dewitte, CEAZA, La Serena, Chile, Ken Takahashi, Instituto Geofisico del Peru, Lima, Peru and Michael J McPhaden, NOAA/PMEL, Seattle, WA, United States