...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Mediterranean outflow strengthening during northern hemisphere coolings: A salt source for the glacial Atlantic?
【24h】

Mediterranean outflow strengthening during northern hemisphere coolings: A salt source for the glacial Atlantic?

机译：北半球降温期间的地中海流出加强：冰河大西洋的盐源？

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

High-resolution grain size and magnetic susceptibility records from the eastern Gulf of Cadiz (site MD99-2339; 1170m water depth) reveal contourites formed by the Mediterranean Outflow (MOW) during the last 47 kyr BP. Oscillations in the MOW's intensity occurred in phase with Greenland temperature variations with a stronger outflow during northern hemisphere coolings such as Dansgaard-Oeschger stadials, Heinrich events, and the Younger Dryas. Benthic delta C-13 data implies the Western Mediterranean Deep Water as one of the main sources feeding the outflow current, while differential changes in the properties of the Mediterranean source and entrained North Atlantic Central Water largely control the MOW's strength. Detailed studies for Heinrich events 1, 4 and 5 show that the flow strength peaked only when subtropical surface waters prevailed in the eastern Gulf of Cadiz, while incursions of icebergs and subpolar surface water were not favorable for the MOW's intensification. As the MOW was strong when the Atlantic's thermohaline circulation (THC) was weakened, the heat and salt injected by the MOW into the intermediate North Atlantic waters might have preconditioned the THC to switch from the stadial to the interstadial mode. (c) 2006 Elsevier B.V. All rights reserved.
机译：来自加的斯东部海湾（站点MD99-2339;水深1170m）的高分辨率晶粒尺寸和磁化率记录显示，在最后47年的BP期间，由地中海流出（MOW）形成的轮廓岩。 MOW强度的振荡与格陵兰的温度变化同相，在北半球降温期间（如Dansgaard-Oeschger球场，Heinrich事件和Younger Dryas），流出量增加。 Benthic三角洲C-13的数据表明，西地中海深水是供给流出水流的主要来源之一，而地中海水源和夹带的北大西洋中央水质的差异变化在很大程度上控制着MOW的强度。对Heinrich事件1、4和5的详细研究表明，只有在亚的地表水在加的斯湾东部盛行时，水流强度才达到峰值，而冰山和亚极地表水的入侵不利于MOW的强化。由于当大西洋的热盐循环（THC）减弱时，MOW较强，因此MOW向北大西洋中部水域注入的热量和盐分可能已预先调节THC从基准模式转换为洲际模式。 （c）2006 Elsevier B.V.保留所有权利。

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