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Conservative behavior of uranium vs. salinity in Arctic sea ice and brine

机译:北极海冰和盐水中铀与盐度的保守行为

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摘要

The conservative behavior of uranium (U) with respect to salinity in open ocean waters is widely accepted. However, in low salinity oceanic environments, such as estuaries, its behavior seems more variable and infor-mation on its distribution over broad salinity scales still needs to be further documented. Sea ice formation in polar oceans constitutes a natural mechanism concentrating dissolved seawater constituents into high salin-ity brine through the distillation of "pure" water into sea ice. Here we present relative U-concentration data in fifteen samples from the Arctic Ocean. They include low-salinity sea ice, underlying surface seawater and sea ice brine covering a salinity range of ~0 to 135. Results suggest that U vs. salinity exhibits conservative behavior over the whole range of salinity investigated. In addition, δ~(234)U measurements agree well with the mean oceanic ~(234)U/~(234)U ratio, suggesting that the processes of sea ice formation and melt do not affect the oceanic relationship between the ~(234)U and ~(234)U.
机译:在露天海水中,铀(U)关于盐度的保守行为已被广泛接受。但是,在低盐度的海洋环境(例如河口)中,其行为似乎更具可变性,并且仍需要进一步记录其在广泛盐度范围内分布的信息。极地海洋中的海冰形成是一种自然机制,它是通过将“纯”水蒸馏成海冰而将溶解的海水成分浓缩成高盐度盐水的。在这里,我们展示了来自北冰洋的15个样本中的相对U浓度数据。它们包括低盐度海冰,下层表层海水和盐度范围为〜0至135的海冰盐水。结果表明,U与盐度在所研究的整个盐度范围内均表现出保守的行为。此外,δ〜(234)U的测量值与平均海洋〜(234)U /〜(234)U的比率非常吻合,表明海冰形成和融化的过程不会影响〜(234)之间的海洋关系。 U和〜(234)U。

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  • 来源
    《Marine Chemistry》 |2012年第20期|p.33-39|共7页
  • 作者单位

    GEOTOP, Université du Quebec à Montréal, CP 8888. Succ Centre Ville, Montreal, Qc, H3C 3P8, Canada Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, 277-8564, Japan;

    Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada;

    GEOTOP, Université du Quebec à Montréal, CP 8888. Succ Centre Ville, Montreal, Qc, H3C 3P8, Canada;

    GEOTOP, Université du Quebec à Montréal, CP 8888. Succ Centre Ville, Montreal, Qc, H3C 3P8, Canada;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Uranium; Salinity; Sea ice; Brine; Seawater; Arctic; Uranium disequilibrium;

    机译:铀;盐度;海冰;盐水;海水;北极;铀不平衡;

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