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首页> 外文期刊>Marine Chemistry >Particulate barium flux and its relationship with export production on the continental shelf of Prydz Bay, east Antarctica
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Particulate barium flux and its relationship with export production on the continental shelf of Prydz Bay, east Antarctica

机译：南极东部普里兹湾大陆架上的颗粒钡通量及其与出口生产的关系

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摘要

Particulate barium fluxes on the continental shelf of Prydz Bay in east Antarctica were measured by using time series sediment trap deployed at two stations with trap depth about 500 m during 7/12/2009-15/2/2010 and 16/12/2010-16/12/2011. The annual fluxes were 123 mg m~(-2) yr~(-1) and 18.4 mg m~(-2) yr~(-1) for barium, and 8.9 mg m~(-2) yr~(-1) and 14.9 mg m~~(-2) yr~(-1) for biogenic barium at two stations, respectively. More than 72% of the barium is from biogenic source. The temporal-spatial variations of biogenic barium fluxes and the ratio of biogenic barium to organic carbon are related to the variation of organic matter export in the upper water column. Biogenic barium flux and organic matter export are generally positive correlated. However, biogenic barium precipitation is less efficient under conditions of high organic matter exports during times of greater primary productivity, which leads to relatively less cycling of organic carbon and in turn produces less barite formation based on the hypothesis that barite forms through organic matter decomposing in microenvironment. More than 72% of the rained biogenic barium at the trap depth was preserved in the sediment. High preservation efficiency of biogenic barium and good relationship between biogenic barium and organic carbon suggested that biogenic barium could be a reliable proxy for the marine export production. The calculated export productions are 6.9 g C m~(-2) yr~(-1) and 14.9 g C m~(-2) yr~(-1) at two stations respectively using the modified prediction equation, which is more suitable for predicating export production for margin and shelf systems.
机译：通过使用时间序列沉积物捕集器测量了南极东部Prydz湾大陆架上的颗粒钡通量，该时间序列在7/12 / 2009-15 / 2/2010和16/12 / 2010-期间部署在两个站深约500 m处2011年12月16日。钡的年通量为123 mg m〜（-2）yr〜（-1）和18.4 mg m〜（-2）yr〜（-1），8.9 mg m〜（-2）yr〜（-1） ）和两个站的生物钡分别为14.9 mg m ~~（-2）yr〜（-1）。钡中超过72％来自生物来源。生物成因钡通量的时空变化以及生物成钡与有机碳的比例与上水柱有机物输出的变化有关。生物钡流量与有机物出口通常呈正相关。但是，在较高的初级生产力下，在有机物输出量较高的情况下，生物钡的沉积效率较低，这导致相对较少的有机碳循环，并且基于重晶石通过有机物分解形成的假说，产生的重晶石较少。微环境。在圈闭深度处，超过72％的下雨的生物成因钡被保留在沉积物中。生物钡的高保存效率以及生物钡与有机碳之间的良好关系表明生物钡可以作为海洋出口产品的可靠替代。利用修正的预测方程，计算得出的两个站点的出口产量分别为6.9 g C m〜（-2）yr〜（-1）和14.9 g C m〜（-2）yr〜（-1），更适合用于预测保证金和货架系统的出口产量。

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  • 来源
    《Marine Chemistry》 |2013年第20期|86-92|共7页
  • 作者

    W.P. Sun; Z.B. Han; C.Y. Hu; J.M. Pan;

  • 作者单位

    Laboratory of Marine Ecosystem and Biogeochemistry. Second Institute of Oceanography. SOA, 310012 Hangzhou, China;

    Laboratory of Marine Ecosystem and Biogeochemistry. Second Institute of Oceanography. SOA, 310012 Hangzhou, China;

    Laboratory of Marine Ecosystem and Biogeochemistry. Second Institute of Oceanography. SOA, 310012 Hangzhou, China;

    Laboratory of Marine Ecosystem and Biogeochemistry. Second Institute of Oceanography. SOA, 310012 Hangzhou, China;

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  • 正文语种 eng
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  • 关键词

    Barium; Flux; Organic carbon; Export production; Continental shelf; Antarctica;

    机译：钡;助焊剂有机碳出口生产;陆架;南极洲;

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