Long-term change and variation of salinity in the western North Pacific subtropical gyre revealed by 50-year long observations along 137°E

Eitarou Oka1, Shota Katsura2, Hiroyuki Inoue3, Atsushi Kojima4, Moeko Kitamoto3, Toshiya Nakano4 and Toshio Suga5, (1)Atmosphere and Ocean Research Institute University of Tokyo, Tokyo, Japan, (2)Atmosphere and Ocean Research Institute University of Tokyo, Kashiwa, Japan, (3)Japan Meteorological Agency, Japan, (4)Global Environment and Marine Department, Japan Meteorological Agency, Tokyo, Japan, (5)Tohoku University, Graduate School of Science, Sendai, Japan