...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >A Numerical Study of Interannual Variability in the North Icelandic Irminger Current
【24h】

A Numerical Study of Interannual Variability in the North Icelandic Irminger Current

机译：北冰岛IRMINGER电流年平衡的数值研究

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 North Icelandic Irminger Current (NIIC) is an important component of the Atlantic Water (AW) inflow to the Nordic Seas. In this study, both observations and a high-resolution (1/12) numerical model are used to investigate the seasonal to interannual variability of the NIIC and its forcing mechanisms. The model-simulated velocity and hydrographic fields compare well with the available observations. The water mass over the entire north Icelandic shelf exhibits strong seasonal variations in both temperature and salinity, and such variations are closely tied to the AW seasonality in the NIIC. In addition to seasonal variability, there is considerable variation on interannual time scales, including a prominent event in 2003 when the AW volume transport increased by about 0.5Sv. To identify and examine key forcing mechanisms for this event, we analyzed outputs from two additional numerical experiments: using only the seasonal climatology for buoyancy flux (the momentum case) and using only the seasonal climatology for wind stress (the buoyancy case). It is found that changes in the wind stress are predominantly responsible for the interannual variations in the AW volume transport, AW fraction in the NIIC water, and salinity. Temperature changes on the shelf, however, are equally attributable to the buoyancy flux and wind forcing. Correlational analyses indicate that the AW volume transport is most sensitive to the wind stress southwest of Iceland.
机译：北冰岛IRMINGER电流（NIIC）是大西洋水（AW）流入北欧海洋的重要组成部分。在本研究中，使用观察和高分辨率（1/12）数值模型来研究季节性的核心和迫使机制的续航变异性。模型模拟速度和水文场与可用的观察相比。整个北冰岛货架上的水质在温度和盐度都表现出强烈的季节性变化，并且这种变化与NIIC的AW季节性密切相关。除了季节性变异性之外，在持续时间尺度上存在相当大的变化，包括2003年，当AW音量运输增加约0.5°5时，包括2003年的突出事件。为了识别和检查此事件的关键迫使机制，我们分析了两种附加数值实验的输出：仅使用季节性气候来进行浮力通量（动量壳），仅使用季节性气候来进行风力应力（浮力壳）。结果发现，风力应力的变化主要负责尼克水中AW体积传输，AW分数的续变性，以及盐度。然而，搁板上的温度变化同样可归因于浮力通量和风强制。相关分析表明，AW批量传输对冰岛西南部的风力应力最敏感。

著录项

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