Eun Young Kwon, Pusan National University, The IBS Center for Climate Physics, Busan, South Korea, Timothy DeVries, University of California, Santa Barabara, Earth Research Institute and Department of Geography, Santa Barabara, United States, Eric D Galbraith, McGill University, Montreal, QC, Canada, Jeomshik Hwang, Seoul National University, Seoul, Korea, Republic of (South), Guebuem Kim, Seoul Natl Univ NS80, Seoul, Korea, Republic of (South) and Axel Timmermann, IBS Center for Climate Physics, Pusan National University, Busan, South Korea