...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Dynamics >Water Mass Transformation Along The Indonesian Throughflow In An Ogcm
【24h】

Water Mass Transformation Along The Indonesian Throughflow In An Ogcm

机译：沿Ogcm印尼通水量的水质转化

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 oceanic pathways connecting the Pacific Ocean to the Indian Ocean are described using a quantitative Lagrangian method applied to Eulerian fields from an ocean general circulation model simulation of the Indonesian seas. The main routes diagnosed are in good agreement with those inferred from observations. The secondary routes and the Pacific recirculation are also quantified. The model reproduces the observed salt penetration of subtropical waters from the South Pacific, the homohaline stratification in the southern Indonesian basins, and the cold fresh tongue which exits into the Indian Ocean. These particular water mass characteristics, close to those observed, are obtained when a tidal mixing parameterization is introduced into the model. Trajectories are obtained which link the water masses at the entrance and at the exit of the Indonesian throughflow (ITF), and the mixing along each trajectory is quantified. Both the ITF and the Pacific recirculation are transformed, suggesting that the Indonesian transformation affects both the Indian and Pacific stratification. A recipe to form Indonesian water masses is proposed. We present three major features of the circulation that revisit the classical picture of the ITF and its associated water mass transformation, while still being in agreement with observations. Firstly, the homohaline layer is not a result of pure isopycnal mixing of the North Pacific Intermediate Water and South Pacific Subtropical Water (SPSW) within the Banda Sea, as previously thought. Instead, the observed homohaline layer is reproduced by the model, but it is caused by both isopycnal mixing with the SPSW and a dominant vertical mixing before the Banda Sea with the NPSW. This new mechanism could be real since the model reproduces the SPSW penetration as observed. Secondly, the model explains why the Banda Sea thermocline water is so fresh compared to the SPSW. Until now, the only explanation was a recirculation of the freshwater from the western route. The model does not reproduce this recirculation but instead shows strong mixing of the SPSW within the Halmahera and Seram Seas, which erodes the salinity maximum so that its signature is not longer perceptible. Finally, this work highlights the key role of the Java Sea freshwater. Even though its annual net mass contribution is small, its fresh salinity contribution is highly significant and represents the main reason why the Pacific salinity maxima are eroded.
机译：使用定量拉格朗日方法描述了连接太平洋到印度洋的海洋路径，该方法是根据印度尼西亚海域的海洋总环流模型模拟应用于欧拉油田的。诊断出的主要路线与从观察中推断出的路线非常吻合。次要路线和太平洋的再循环也被量化。该模型再现了观察到的来自南太平洋的亚热带水的盐分渗透，印尼南部盆地的高盐分层以及进入印度洋的新鲜冷舌。当将潮汐混合参数化引入模型中时，可以获得接近观察到的这些特殊的水质特征。获得的轨迹将印尼通流（ITF）入口和出口处的水团连接起来，并量化了沿每个轨迹的混合。 ITF和太平洋的再循环都发生了转变，这表明印度尼西亚的转变同时影响了印度和太平洋的分层。提出了形成印尼水团的方法。我们介绍了环流的三个主要特征，这些特征重新审视了ITF的经典情况及其相关的水质转化，同时仍与观测结果保持一致。首先，高盐层不是班达海内北太平洋中间水和南太平洋亚热带水（SPSW）的纯等渗混合的结果。取而代之的是，模型再现了观测到的高盐层，但这是由于与SPSW的等渗混合和班达海与NPSW之前的显性垂直混合所致。这种新机制可能是真实的，因为该模型再现了观察到的SPSW渗透。其次，该模型解释了为什么班达海的温床水与SPSW相比如此新鲜。到目前为止，唯一的解释是从西部途径回收的淡水。该模型没有重现这种再循环，而是显示了在哈马黑拉海域和塞拉姆海中SPSW的强烈混合，这侵蚀了最大盐度，因此其特征不再可见。最后，这项工作突出了爪哇海淡水的关键作用。尽管其年度净质量贡献很小，但其新鲜的盐度贡献却非常重要，这代表了太平洋盐度最大值被侵蚀的主要原因。

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