...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physical Oceanography >Variability of Warm Deep Water Inflow in a Submarine Trough on the Amundsen Sea Shelf
【24h】

Variability of Warm Deep Water Inflow in a Submarine Trough on the Amundsen Sea Shelf

机译：阿蒙森海架海底深槽中温暖深水流入的变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The ice shelves in the Amundsen Sea are thinning rapidly, and the main reason for their decline appears to be warm ocean currents circulating below the ice shelves and melting these from below. Ocean currents transport warm dense water onto the shelf, channeled by bathymetric troughs leading to the deep inner basins. A hydrographic mooring equipped with an upward-looking ADCP has been placed in one of these troughs on the central Amundsen shelf. The two years (2010/11) of mooring data are here used to characterize the inflow of warm deep water to the deep shelf basins. During both years, the warm layer thickness and temperature peaked in austral fall. The along-trough velocity is dominated by strong fluctuations that do not vary in the vertical. These fluctuations are correlated with the local wind, with eastward wind over the shelf and shelf break giving flow toward the ice shelves. In addition, there is a persistent flow of dense lower Circumpolar Deep Water (CDW) toward the ice shelves in the bottom layer. This bottom-intensified flow appears to be driven by buoyancy forces rather than the shelfbreak wind. The years of 2010 and 2011 were characterized by a comparatively stationary Amundsen Sea low, and hence there were no strong eastward winds during winter that could drive an upwelling of warm water along the shelf break. Regardless of this, there was a persistent flow of lower CDW in the bottom layer during the two years. The average heat transport toward the- ice shelves in the trough was estimated from the mooring data to be 0.95 TW.
机译：阿蒙森海的冰架正在迅速变薄，其下降的主要原因似乎是温暖的洋流在冰架下方循环并从下方融化。洋流将暖稠的水运到架子上，并由测深槽引导到深层内部盆地。配备有向上看的ADCP的水文系泊设备已放置在Amundsen中央架子的这些槽之一中。这里使用两年（2010/11年）的系泊数据来表征温暖的深水流入深层架盆。在这两年中，暖层的厚度和温度都在南极秋季下降。沿槽的速度主要由在垂直方向上不变的强烈波动决定。这些波动与局部风有关，架子上的东风和架子破裂使流向冰架。此外，还有一层稠密的低层极地深水（CDW）持续流向底层的冰架。这种底部增强的流动似乎是由浮力而不是架子风驱动的。 2010年和2011年的特点是阿蒙森海面相对平稳，因此冬季没有强烈的东风，可能导致沿架子断裂的暖水上升。无论如何，在过去的两年中，底层的CDW持续不断地流动。根据系泊数据，向槽中冰架的平均热传递估计为0.95 TW。

著录项

  • 来源
    《Journal of Physical Oceanography》 |2013年第10期|2054-2070|共17页
  • 作者

    A. K. Wahlin; O. Kalen; L. Arneborg; G. Bjork; G. K. Carvajal; H. K. Ha; T. W. Kim; S. H. Lee; J. H. Lee; C. Stranne;

  • 作者单位

    Department of Earth Sciences, University of Gothenburg, Box 460, 405 30 Gothenburg, Sweden;

    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden;

    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden;

    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden;

    Chalmers University of Technology, Gothenburg, Sweden;

    Division of Polar Climate Research, Korea Polar Research Institute, Incheon, South Korea;

    Division of Polar Climate Research, Korea Polar Research Institute, Incheon, South Korea;

    Division of Polar Climate Research, Korea Polar Research Institute, Incheon, South Korea;

    Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology, Ansan, South Korea;

    Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden;

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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号