Journal Title
Title of Journal: J Oceanogr
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Abbravation: Journal of Oceanography
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Authors: Abigail Parcasio Cid Syouhei Urushihara Tomoharu Minami Kazuhiro Norisuye Yoshiki Sohrin
Publish Date: 2011/09/16
Volume: 67, Issue: 6, Pages: 747-764
Abstract
The distribution of Al Mn Fe Co Ni Cu Zn Cd and Pb in seawater was investigated on the Bering Sea shelf 56–64°N 165–169°W in September 2000 The unfiltered and filtered seawater samples were used for determination of total dissolvable TD and dissolved D metals M respectively The TDM concentrations were generally higher than in the Pacific Ocean TDCd was highest in deep water of the outer shelf domain and dominated by dissolved species The other TDM were highest at stations close to the Yukon River delta and had higher fractions of labile particulate LP species that were obtained as the difference between TDM and DM Dissolved Al Ni and Cu were characterized by input from the Yukon River Dissolved Mn and Co showed maximums on the bottom of the coastal domain suggesting influence of sedimentary Mn reduction The correlations of DZn DCd and macronutrients indicated their distributions were largely controlled through uptake by microorganisms and remineralization from settling particles All these three processes river input sedimentary reduction and biogeochemical cycle had an influence on the distribution of DFe DPb was fairly uniformly distributed in the study area The stoichiometry of DM in the Bering Sea shelf showed enrichment of Co and Pb and depletion of Ni Cu Zn and Cd compared with that in the North Pacific The LPM/LPAl ratio revealed significant enrichment of the other eight metals relative to their crustal abundance suggesting importance of formation of Fe–Mn oxides and adsorption of trace metals on the oxidesAPC was supported by a Monbukagakusho MEXT scholarship We are grateful to Captain Masaharu Akamine and the crew of R/V Mirai JAMSTEC for their help during the MR00K06 cruise We thank the chief scientist Dr Takatoshi Takizawa Prof Noriyuki Tanaka and onboard scientists and technicians Basic oceanographic parameters were obtained thanks to staff from JAMSTEC and Nippon Marine Enterprises This research was partly supported by funds from the Steel Industry Foundation for the Advancement of Environmental Protection Technology and from GrantinAid of Scientific Research the Ministry of Education Culture Sports Science and Technology of Japan
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