...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Paleoceanography >Evolution of the North Pacific Subtropical Gyre during the past 190kyr through the interaction of the Kuroshio Current with the surface and intermediate waters
【24h】

Evolution of the North Pacific Subtropical Gyre during the past 190kyr through the interaction of the Kuroshio Current with the surface and intermediate waters

机译：通过黑潮与地表水和中间水域的相互作用，过去190kyr期间北太平洋亚热带环流的演变

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 Pacific Subtropical Gyre (NPSG) has two important functions, i.e., one in ocean heat transfer and another as a driving force for circulation of the surface and intermediate waters on the basin scale. In the present study, we describe records of the vertical thermal structures and distributions of water masses in the upper ocean of the subtropical northwest (NW) Pacific for the past 190kyr, using two sediment cores collected from the Kuroshio Current area in the East China Sea and the NPSG area. During the two glacial periods, the Kuroshio Current was weakened owing to changes in ocean-atmosphere circulation and eustasy. The differences in the Mg/Ca-derived temperatures between surface and thermocline waters show the changes of depth and temperature (warming) of thermocline during glacial periods. Conversely, the planktonic foraminiferal assemblages demonstrate that the indicator of the intermediate water from the central area of the NPSG increased synchronously with thermocline warming during marine isotope stage (MIS) 6. These results suggest that warm intermediate water strongly affected the changes in the water-column structure of the subtropical NW Pacific during MIS 6. However, during MIS 2, cold water had precedence over intermediate water probably owing to the southward shift of the subtropical front associated with the reduced transport of the Kuroshio Current. Thus, the NPSG has evolved differently during the two glacial periods (MIS 2 and MIS 6) through interactions between the Kuroshio Current, surface water, and intermediate water.
机译：北太平洋亚热带环流（NPSG）具有两个重要功能，即，一个功能是海洋热传递，另一个功能是驱动流域规模的地表水和中间水循环。在本研究中，我们使用从东海黑潮洋流区收集的两个沉积岩心，描述了过去190kyr的亚热带西北太平洋（NW）太平洋上层海洋垂直热结构和水团的分布记录。和NPSG区域。在两个冰河时期，由于海洋大气环流和摇头丸的变化，黑潮潮流减弱了。地表水和温跃层水之间的Mg / Ca衍生温度差异表明，冰川期的深度和温度（变暖）变化。相反，浮游有孔虫的组合表明，在海洋同位素阶段（MIS）6期间，来自NPSG中心区域的中间水的指示物与温跃层变暖同步增加。这些结果表明，温暖的中间水强烈影响水- MIS 6期间亚热带西北太平洋的柱状结构。但是，在MIS 2期间，冷水优先于中间水，这可能是由于副热带锋面的南移以及黑潮潮流的减少所致。因此，NPSG通过黑潮，地表水和中间水之间的相互作用，在两个冰期（MIS 2和MIS 6）中发生了不同的变化。

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