TY - JOUR T1 - Large Variability of Dissolved Inorganic Radiocarbon in the Kuroshio Extension of the Northwest North PacificABSTRACT JF - Radiocarbon Y1 - 2018 A1 - Ding, Ling A1 - Ge, Tiantian A1 - Gao, Huiwang A1 - Luo, Chunle A1 - Xue, Yuejun A1 - Druffel, Ellen R M A1 - Wang, Xuchen KW - bomb radiocarbon KW - carbon KW - intermediate water KW - MIXED WATER REGION KW - ocean KW - WESTERN BOUNDARY CURRENTS AB - Radiocarbon (C-14) in dissolved inorganic carbon (DIC) was measured for water samples collected from six deep stations in the Kuroshio Extension (KE) region in the northwestern North Pacific in April-May 2015. Vertical profiles of Delta C-14-DIC indicate that bomb-produced Delta C-14 was present from the surface to similar to 1500 m water depth. Large variations in Delta C-14-DIC values (300 parts per thousand) were observed at 500 m water depth among the stations and the differences were likely controlled by transport and mixing dynamics of different water masses in the region. The major Pacific western boundary currents, such as Kuroshio and Oyashio and regional mesoscale eddies, could play important roles affecting the observed Delta C-14-DIC variability. The depth profiles of both Delta C-14-DIC and DIC concentrations can be predicted by the solution mixing model and can be used as conservative tracers of water mass movement and water parcel homogenization in the ocean. VL - 60264317255 UR - https://www.cambridge.org/core/product/identifier/S0033822217001436/type/journal_articlehttps://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822217001436 IS - 02 ER -