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Polynya impacts on water properties in a Northeast Greenland fjord

机译:波利尼亚对东北格陵兰峡湾水质的影响

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摘要

Polynyas are an important yet poorly understood phenomena of high latitude oceans. A storm event during late December 2013 with down-fjord winds of up to 25 m/s forced the collapse of the landfast ice over the Young Sound (YS) fjord outlet in northeast Greenland. This storm created a coastal polynya that was further maintained by several consecutive wind events until early March 2014. During the polynya period, three landfast ice-tethered oceanographic moorings recorded an enhanced surface layer (~0-40 m) transport towards the mouth of YS and a layer below (~40-140 m) flowing into the fjord and supplying the interior with cool and saline water from the polynya. Subsequent CTD transects in May 2014 reveal that this lower layer contained polynya originated cool, saline and oxygen enriched water with oxygen concentrations significantly exceeding values from the previous summer. Salt balance bulk estimates show that the polynya generated a sufficient amount of brine to ventilate the fjord interior.
机译:波利尼耶斯是高纬度海洋的一个重要但尚未为人所知的现象。 2013年12月下旬的一场风暴事件,下风高达25 m / s,迫使格陵兰东北部Young Sound(YS)峡湾出口的陆上冰层塌陷。这场风暴造成了沿海的多年生植物,并通过数次连续的风事件得到进一步维持,直到2014年3月初。在该多年生植物期间,三个陆地冰河系留的海洋系泊系统记录了向YS口的增强的表层(〜0-40 m)传输下方的一层(约40-140 m)流入峡湾,并为内部提供来自多年生多酚的冷盐水。 2014年5月的随后CTD断面显示,该较低层含有多产于低温,富含盐水和富氧的水,其氧气浓度大大超过了去年夏天的值。盐平衡的大量估计表明,the虫产生了足够量的盐水以使峡湾内部通风。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2015年第5期|10-17|共8页
  • 作者单位

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada,Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland,Arctic Research Centre, Aarhus University, Arhus, Denmark;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Danish Meteorological Institute (DMI), Copenhagen, Denmark;

    Institute of Oceanography, University of Hamburg, Germany,Climate Service Center 2.0, HZG, Hamburg, Germany;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada;

    Greenland Climate Research Centre, Greenland Institute of Natural Resources, Nuuk, Greenland;

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

    fjord dynamics; polynyas; fast ice; mooring systems; CTD observations;

    机译:峡湾动态波利尼亚斯快冰系泊系统;CTD观察;

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