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The Atlantic Water Boundary Current in the Chukchi Borderland and Southern Canada Basin

机译：Chukchi Bordland和Canada南部南部的大西洋水界电流

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摘要

Synoptic shipboard measurements, together with historical hy-drographic data and satellite data, are used to elucidate the detailed structure of the Atlantic Water (AW) boundary current system in the southern Canada Basin and its connection to the upstream source of AW in the Chukchi Borderland. Nine high-resolution occupations of a transect extending from the Beaufort shelf to the deep basin near 152°W, taken between 2003 and 2018, reveal that there are two branches of the AW boundary current that flow beneath and counter to the Beaufort Gyre. Each branch corresponds to a warm temperature core and transports comparable amounts of Fram Strait Branch Water between roughly 200-700 m depth, although they are characterized by a different temperature/salinity (T/S) structure. The mean volume flux of the combined branches is 0.87 + 0.13 Sv. Using the historical hydrographic data, the two branches are tracked upstream by their temperature cores and T/S signatures. This sheds new light on how the AW negotiates the Chukchi Borderland and why two branches emerge from this region. Lastly, the propagation of warm temperature anomalies through the region is quantified and shown to be consistent with the deduced circulation scheme.
机译：揭示船板测量与历史hy-straoction数据和卫星数据一起使用，用于阐明加拿大南部南部南部大西洋水（AW）边界电流系统的详细结构及其与Chukchi Bordland的AW上游来源的连接。在2003年至2018年间，从Beaufort架延伸到从Beaufort架延伸到152°W附近的深盆地的九个高分辨率占用，揭示了武器界限的两个分支，并与Beaufort Gyre反击。每个分支对应于温热的温度核心，并且在大约200-700米深度之间传输相当量的FRAM海峡支水，尽管它们的特征在于不同的温度/盐度（T / S）结构。组合分支的平均体积通量为0.87 + 0.13 sv。使用历史水文数据，通过温度核和T / S签名跟踪两个分支。这揭示了AW如何谈判Chukchi Bordland以及为什么两个分支从这个地区出现。最后，量化了通过该区域的暖温度异常传播并显示与推导的循环方案一致。

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  • 来源
    《Oceanographic Literature Review》 |2020年第10期|2084-2084|共1页
  • 作者

    J. Li; R.S. Pickart; P. Lin;

  • 作者单位

    Woods Hole Oceanographic Institution Woods Hole MA United States;

    Woods Hole Oceanographic Institution Woods Hole MA United States;

    Woods Hole Oceanographic Institution Woods Hole MA United States;

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  • 正文语种 eng
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