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Temporal Changes in the Antarctic Circumpolar Current IMPLICATIONS FOR THE ANTARCTIC CONTINENTAL SHELVES

机译：南极洲大陆架的南极洲极电流的时间变化

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摘要

Some of the most rapid melting of ice sheets and ice shelves around Antarctica has occurred where the Antarctic Circumpolar Current (ACC) is in close proximity to the Antarctic continent. Several mechanisms have been hypothesized by which warming trends in the ACC could lead to warmer temperatures on the Antarctic continental shelves and corresponding thinning of ice shelves. One possibility is that a southward shift in the dominant westerly winds has led to a southward shift in the ACC, bringing comparatively warm (1 degrees C-3 degrees C) Circumpolar Deep Water (CDW) in closer contact with Antarctica; however, satellite altimetry does not provide strong evidence for this option. A second possibility is that stronger winds have led to stronger poleward eddy heat transport, bringing more CDW southward. In addition, submarine canyons and winds are hypothesized to be critical for transporting CDW across the continental shelves. The specific mechanisms and the relative roles of westerly winds, easterly winds, and wind-stress curl remain areas of active research.
机译：南极周围极地洋流（ACC）紧邻南极大陆时，发生了一些最快的南极洲冰盖和冰架融化。推测了几种机制，通过这些机制，ACC的变暖趋势可能导致南极大陆架的温度升高，并且冰架相应变薄。一种可能是主导西风向南移动导致ACC向南移动，使相对温暖（1摄氏度至3摄氏度）的绕极深水（CDW）与南极洲更加紧密地接触。但是，卫星测高仪无法提供这种选择的有力证据。第二种可能性是，更强的风导致更强的极向涡流传热，使更多的CDW向南移动。此外，假设海底峡谷和风对跨大陆架运输CDW至关重要。西风，东风和风应力卷曲的具体机制及其相对作用仍然是活跃的研究领域。

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  • 来源
    《Oceanography》 |2016年第4期|96-105|共10页
  • 作者

    Gille Sarah T.; McKee Darren C.; Martinson Douglas G.;

  • 作者单位

    Univ Calif San Diego, Inst Oceanog, La Jolla, CA 92093 USA;

    Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA;

    Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA;

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