JpGU-AGU Joint Meeting 2026

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[E] Oral

A (Atmospheric and Hydrospheric Sciences ) » A-OS Ocean Sciences & Ocean Environment

[A-OS20] Biogeochemical and Ecological Processes in the Open Ocean

Thu. May 28, 2026 9:00 AM - 10:30 AM 105 (International Conference Hall, Makuhari Messe)

Chairperson:Kodama Taketoshi(The University of Tokyo), Shigemitsu Masahito(Japan Agency for Marine-Earth Science and Technology), Shiozaki Takuhei(Atmosphere and Ocean Research Institute, The University of Tokyo), Martiny Adam(University of California Irvine)

9:45 AM - 10:00 AM

[AOS20-04] Insights into the Nitrogen Cycle in the Indian Ocean from Nitrogen and Oxygen Isotope Ratios of Nitrate

*Chisato Yoshikawa1, Akiko Makabe1, Masahito Shigemitsu1, Sakae Toyoda2, Makio Honda1, Naohiko Ohkouchi1 (1. Japan Agency for Marine-Earth Science and Technology, 2. Science Tokyo)

Keywords:Indian Ocean, Marine nitrogen cycle, Nitrate isotopes