• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Paleoceanography >Effect of ocean gateways on the global ocean circulation in the late Oligocene and early Miocene
【24h】

Effect of ocean gateways on the global ocean circulation in the late Oligocene and early Miocene

机译：渐新世晚期和中新世早期海洋通道对全球海洋环流的影响

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

We investigate the effect of changes in the tectonic boundary conditions on global ocean circulation patterns. Using a fully coupled climate model in an idealized setup, we compare situations corresponding to the late Oligocene, the early Miocene, and present day. The model results show the existence of a flow reversal through the Panama Seaway between the Oligocene and Miocene. This flow reversal is induced by global tectonic changes related to the widening of the Southern Ocean passages and the closing of the Tethys Seaway. It mainly involves the wind-driven ocean circulation, in agreement with previous model studies. The global thermohaline circulation in the Oligocene and Miocene simulations is significantly different from the present-day conveyor circulation, as there is deepwater formation in both the North Atlantic and the North Pacific oceans. In particular, in the Oligocene simulation the salinity contrast between the Atlantic and Pacific oceans is reduced because of water mass exchange through the low-latitude connections between the two oceans.
机译：我们调查了构造边界条件的变化对全球海洋环流模式的影响。在理想化的环境中使用完全耦合的气候模型，我们比较了渐新世晚期，中新世早期和当今的情况。模型结果表明，在渐新世和中新世之间存在通过巴拿马海道的逆流。这种逆流是由与南大洋通道的拓宽和特提斯海道关闭有关的全球构造变化引起的。与先前的模型研究一致，它主要涉及风驱动的海洋环流。渐新世和中新世模拟中的全球热盐环流与当今的输送带环流有显着差异，因为北大西洋和北太平洋海洋均形成深水。特别是在渐新世模拟中，由于通过两大洋之间的低纬度连接进行水质交换，大西洋和太平洋之间的盐度对比降低了。

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