Seasonal transition of the dominant nitrogen source for phytoplankton reconstructed by determining the nitrogen isotope composition for nitrate, ammonium, and individual amino acids of sinking particles in the Northwestern Pacific
Chisato Yoshikawa1, Nanako O Ogawa2, Yoshito Chikaraishi3, Akiko Makabe4, Yohei Matsui4, Yoshikazu Sasai5, Masahide Wakita6, Makio C Honda7, Yoshihisa Mino8, Maki Noguchi Aita9, Tetsuichi Fujiki10, Takuro Nunoura4, Naomi Harada11 and Naohiko Ohkouchi2, (1)JAMSTEC, Tokosuka, Japan, (2)JAMSTEC, Research Institute for Marine Resources Utilization (Biogeochemistry Program), Yokosuka, Japan, (3)Hokkaido University, Institute of Low Temperature Science, Sapporo, Japan, (4)JAMSTEC, Yokosuka, Japan, (5)Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Research Institute for Global Change (RIGC), Yokohama, Japan, (6)JAMSTEC, MIO, Mutsu, Japan, (7)JAMSTEC, Kanagawa, Japan, (8)Nagoya University, Nagoya, Japan, (9)Japan Agency for Marine-Earth Science and Technology, Research Institute for Global Change, Yokohama, Japan, (10)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (11)Japan Agency for Marine-Earth Science & Technology, Yokosuka, Japan
