Interannual variability in equatorial Kelvin waves in the upper troposphere and lower stratosphere, and relation to the background equatorial wind

Junko Suzuki, JAMSTEC, Kanagawa, Japan, Noriyuki Nishi, Faculty of Science, Fukuoka University, Fukuoka, Japan, Masatomo Fujiwara, Hokkaido University, Faculty of Environmental Earth Science, Sapporo, Japan and Kunio Yoneyama, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan