Articles | Volume 14, issue 4
https://doi.org/10.5194/os-14-575-2018
https://doi.org/10.5194/os-14-575-2018
Research article
 | 
13 Jul 2018
Research article |  | 13 Jul 2018

Hadal water biogeochemistry over the Izu–Ogasawara Trench observed with a full-depth CTD-CMS

Shinsuke Kawagucci, Akiko Makabe, Taketoshi Kodama, Yohei Matsui, Chisato Yoshikawa, Etsuro Ono, Masahide Wakita, Takuro Nunoura, Hiroshi Uchida, and Taichi Yokokawa

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Latest update: 20 May 2024
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Short summary
A full-depth-rated conductivity–temperature–depth profiler with carousel~multiple sampling (CTD-CMS) system on the research vessel R/V Kaimei can illuminate the last frontier, i.e., the hadal zone, an oceanographic province deeper than 7000 m. A series of biogeochemical observations of hadal seawater at the Izu–Ogasawara and Mariana trenches revealed basically well-mixed hydrographic properties and a heterogeneous distribution of likely sediment-derived compounds.