Increasing frequency of extreme El Niño events due to greenhouse warming

Wenju Cai, Simon Borlace, Matthieu Lengaigne, Peter Van Rensch, Mat Collins, Gabriel Vecchi, Axel Timmermann, Agus Santoso, Michael J. Mcphaden, Lixin Wu, Matthew H. England, Guojian Wang, Eric Guilyardi, Fei Fei Jin