[16p-D519-1~15] CS.1 Code-sharing Session of 2.3 & 7.4 &7.5

▼ [16p-D519-9] Speciation distribution of iodine isotopes (¹²⁷I and ¹²⁹I) in the Beaufort, Chukchi, and Bering Seas

〇(P)Yuanzhi Qi¹, Qiuyu Yang¹, Takeyasu Yamagata¹, Hisao Nagai^1,2, Yuichiro Kumamoto³ (1.The Univ. of Tokyo, 2.Nihon Univ., 3.JAMSTEC)

Keywords:Iodine-129, Speciation analysis, Arctic Ocean

Because of its special geographical location, the Arctic Ocean and its adjacent seas are very sensitive to climate change, and the material and energy cycles in them will in turn have an important impact on global climate change. Here, we present results on concentrations of different iodine isotopes (¹²⁷I and ¹²⁹I) of total iodine (TI), iodide (I^–), and iodate (IO₃^–) in seawater samples of two depth profiles collected in the Beaufort Sea and 15 additional surface seawater samples collected in the Beaufort, Chukchi, and Bering Seas from 12 August to 6 October 2022. Our study shows that ¹²⁹I can provide essential and detailed information for tracing water masses and studying the iodine cycle.