Distribution of iodine-129 in the Japan Sea and the Bering Sea; Oceanographic insights

Suzuki, Takashi ; Otosaka, Shigeyoshi* ; Kuwabara, Jun ; Nishioka, Jun*

$^{129}$ I concentrations in seawater from the Japan Sea and the Bering Sea were measured to evaluate its applicability as an oceanographic tracer. Surface seawater concentrations of $^{129}$ I in the Japan Sea were higher than those in the Bering Sea, likely reflecting atmospheric transport patterns of $^{129}$ I. Vertical profiles showed decreasing concentrations with depth, and in the Japan Sea, anthropogenic $^{129}$ I was observed to reach bottom waters. The total inventory was higher in the Japan Sea, which is attributed to its unique circulation structure and topographic constraints. Furthermore, the turnover time of Japan Sea Bottom Water was estimated to be 200-520 years, demonstrating its usefulness as a tracer for ocean circulation.

Language	:	English
Journal	:
Volume	:
Number	:
Pages	:
Publication Year/Month	:
Meeting title	:	The Pacific-Asian Marginal Seas Meeting 2026
Held date	:	2026/06
Location (city)	:	Sapporo
Location (country)	:	Japan
Patent information	:
PDF	:
Paper URL	:
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	iodine-129; Japan Sea; Bering Sea; oceanographic tracer
Research Facility	:	AMS(加速器質量分析装置)
Press Release	:
JAEA R&D Navigator	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:
Altmetrics	:

Registration No. : BB20252019
JAEA Abstracts No. :
Paper Submission No. :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.