Large Variability of Dissolved Inorganic Radiocarbon in the Kuroshio Extension of the Northwest North PacificABSTRACT

TitleLarge Variability of Dissolved Inorganic Radiocarbon in the Kuroshio Extension of the Northwest North PacificABSTRACT
Publication TypeJournal Article
Year of Publication2018
AuthorsDing, L, Ge, T, Gao, H, Luo, C, Xue, Y, Druffel, ERM, Wang, X
JournalRadiocarbon
Volume60264317255
Issue02
Pagination691 - 704
Date PublishedJan-04-2018
ISSN0033-8222
Keywordsbomb radiocarbon, carbon, intermediate water, MIXED WATER REGION, ocean, WESTERN BOUNDARY CURRENTS
Abstract

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.

URLhttps://www.cambridge.org/core/product/identifier/S0033822217001436/type/journal_articlehttps://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822217001436
DOI10.1017/RDC.2017.143