Modulation by low-frequency variability leads to unusual Indian Ocean dipole events in 2015 and 2016

Yan DU, SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China, Lianyi Zhang, SCSIO South China Sea Institute of Oceanology, Chinese Academy of Sciences, China and Wenju Cai, CSIRO Oceans and Atmosphere, Aspendale, Australia