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首页> 外文期刊>Marine Chemistry >Biogenic halocarbons in young Arctic sea ice and frost flowers
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Biogenic halocarbons in young Arctic sea ice and frost flowers

机译：北极年轻海冰和霜花中的生物卤代烃

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摘要

The fate of halocarbons, naturally produced volatile halogenated organic compounds, in young Arctic sea ice was studied to better understand the role of sea ice in halocarbon cycling. In early spring, halocarbons were measured in sea ice frozen in core holes, during 12 days of formation and freezing. In order to understand which factors govern halocarbon concentration and distribution, salinity, temperature and biological parameters were monitored in the growing sea ice. It was found that sea ice participates in the cycling of halocarbons between sea and air. Sea ice concentrations and distributions of these compounds were influenced by production in the ice, where ice-inhabiting microorganisms caused local increases in halocarbon concentrations. Moreover, the halocarbon ice concentration decrease/change with time did not follow ice salinity, suggesting that additional removal processes caused sea ice to be a source of halogens to overlying air. The net production rate of bromoform in the surface of newly frozen ice was estimated to 14 pmol L~(-1) d~(-1) and the maximum removal rate was 18 pmol L~(-1) d~(-1). In addition frost flowers on newly formed sea ice were identified as contributors of halocarbons to the atmosphere with halocarbon concentrations in the same order of magnitude as in sea ice brine.
机译：研究了北极年轻海冰中卤代烃（天然产生的挥发性卤代有机化合物）的命运，以更好地了解海冰在卤代烃循环中的作用。在早春，在形成和冻结的12天中，在冻结在岩心孔中的海冰中测量了卤代烃。为了了解影响卤代烃浓度和分布的因素，在生长的海冰中监测了盐度，温度和生物学参数。人们发现，海冰参与了海空之间卤代烃的循环。海冰的浓度和这些化合物的分布受制冰的影响，在冰中，居住冰的微生物引起卤代烃浓度的局部增加。此外，卤化碳冰浓度随时间的降低/变化没有遵循冰盐度，这表明额外的去除过程导致海冰成为上覆空气中卤素的来源。估计新冷冻冰表面中溴仿的净生产率为14 pmol L〜（-1）d〜（-1），最大去除率为18 pmol L〜（-1）d〜（-1）。 。此外，新形成的海冰上的霜花被认为是大气中卤代烃的贡献者，其卤代烃浓度与海冰盐水中的数量级相同。

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  • 来源
    《Marine Chemistry》 |2013年第20期|124-134|共11页
  • 作者

    Anna Granfors; Maria Andersson; Melissa Chierici; Agneta Fransson; Katarina Gardfeldt; Anders Torstensson; Angela Wulff; Katarina Abrahamsson;

  • 作者单位

    Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Goeteborg, Sweden;

    Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Goeteborg, Sweden,ESSIQ AB, SE-421 50 Vaestra Froelunda, Sweden;

    Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Goeteborg, Sweden;

    Department of Earth Sciences, University of Gothenburg, SE-405 30 Goeteborg, Sweden,Norwegian Polar Institute, Fram Centre, Tromso, Norway;

    Centre for Environment and Sustainability, Chalmers University of Technology, University of Gothenburg, SE-412 96 Goeteborg, Sweden;

    Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, SE-405 30 Goeteborg, Sweden;

    Department of Biological and Environmental Sciences, University of Gothenburg, P.O. Box 461, SE-405 30 Goeteborg, Sweden;

    Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Goeteborg, Sweden;

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  • 正文语种 eng
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  • 关键词

    Biogenic halocarbons; Bromoform; Degassing; Young sea ice; Frost flowers; Ice algae; Heterotrophic bacteria;

    机译：生物卤代烃;溴仿脱气年轻的海冰;霜花;冰藻;异养细菌;

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