...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Paleoceanography >The last five glacial-interglacial transitions: A high-resolution 450,000-year record from the subantarctic Atlantic
【24h】

The last five glacial-interglacial transitions: A high-resolution 450,000-year record from the subantarctic Atlantic

机译：最近的五个冰期至冰期之间的过渡：来自南极南大西洋的高分辨率450,000年的记录

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

A submillennial resolution, radiolarian-based record of summer sea surface temperature (SST) documents the last five glacial to interglacial transitions at the subtropical front, southern Atlantic Ocean. Rapid fluctuations occur both during glacial and interglacial intervals, and sudden cooling episodes at glacial terminations are recurrent. Surface hydrography and global ice volume proxies from the same core suggest that summer SST increases prior to terminations lead global ice- volume decreases by 4.7 +/- 3.7 ka (in the eccentricity band), 6.9 +/- 2.5 ka (obliquity), and 2.7 +/- 0.9 ka (precession). A comparison between SST and benthic delta C-13 suggests a decoupling in the response of northern subantarctic surface, intermediate, and deep water masses to cold events in the North Atlantic. The matching features between our SST record and the one from core MD97-2120 (southwest Pacific) suggests that the super-regional expression of climatic events is substantially affected by a single climatic agent: the Subtropical Front, amplifier and vehicle for the transfer of climatic change. The direct correlation between warmer Delta T-site at Vostok and warmer SST at ODP Site 1089 suggests that warmer oceanic/atmospheric conditions imply a more southward placed frontal system, weaker gradients, and therefore stronger Agulhas input to the Atlantic Ocean.
机译：一项基于千年纪的决议，基于放射虫的夏季海面温度（SST）记录记录了南大西洋副热带锋面最近的五个冰期至冰期转变。在冰川期和冰川间期都发生快速波动，并且在冰川终止处突然出现降温现象。来自同一核心的地表水文学和全球冰量代理表明，夏季SST在终止之前增加，导致全球冰量减少了4.7 +/- 3.7 ka（在偏心带），6.9 +/- 2.5 ka（倾角）和2.7 +/- 0.9 ka（进动）。 SST和底栖三角洲C-13之间的比较表明，北亚极表层，中层和深水团对北大西洋的冷事件的响应呈解耦关系。我们的SST记录与MD97-2120核心（西南太平洋）的记录之间的匹配特征表明，气候事件的超区域表达受单个气候因素的影响很大：亚热带锋面，放大器和气候转移媒介更改。沃斯托克（Vostok）较暖的Delta T站点与ODP站点1089的较暖海温（SST）之间的直接相关性表明，较暖的海洋/大气条件意味着额叶系统更偏南，梯度较弱，因此有更多的Agulhas输入大西洋。

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