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Title: Isotopic constraints on biogeochemical cycling of copper in the ocean.
Authors: Takano, Shotaro  kyouindb  KAKEN_id
Tanimizu, Masaharu
Hirata, Takafumi
Sohrin, Yoshiki  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 高野, 祥太朗
谷水, 雅治
宗林, 由樹
Keywords: Earth sciences
Issue Date: 5-Dec-2014
Publisher: Nature Publishing Group
Journal title: Nature communications
Volume: 5
Thesis number: 5663
Abstract: Trace elements and their isotopes are being actively studied as powerful tracers in the modern ocean and as proxies for the palaeocean. Although distributions and fractionations have been reported for stable isotopes of dissolved Fe, Cu, Zn and Cd in the ocean, the data remain limited and only preliminary explanations have been given. Copper is of great interest because it is either essential or toxic to organisms and because its distribution reflects both biological recycling and scavenging. Here we present new isotopic composition data for dissolved Cu (δ(65)Cu) in seawater and rainwater. The Cu isotopic composition in surface seawater can be explained by the mixing of rain, river and deep seawater. In deep seawater, δ(65)Cu becomes heavier with oceanic circulation because of preferential scavenging of the lighter isotope ((63)Cu). In addition, we constrain the marine biogeochemical cycling of Cu using a new box model based on Cu concentrations and δ(65)Cu.
Description: 海洋における銅同位体比の分布を高精度で解明 -重金属元素の同位体比が海洋大循環を辿る指標になる可能性を示唆-. 京都大学プレスリリース. 2014-12-08.
Rights: © 2014 Macmillan Publishers Limited.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1038/ncomms6663
PubMed ID: 25476795
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