Importance of a vertically tilting structure for energizing the North Atlantic Oscillation

Patrick Martineau1, Hisashi Nakamura1, Yu Kosaka2 and Ayako Yamamoto3, (1)University of Tokyo, Bunkyo-ku, Japan, (2)Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan, (3)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kanagawa, Japan