...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange
【24h】

Age characteristics of a shelf-break eddy in the western Arctic and implications for shelf-basin exchange

机译：北极西部一类陆架破裂涡的年龄特征及其对陆架交换的影响

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

Radioisotope evaluation of a cold-core, anticyclonic eddy surveyed in September 2004 on the Chukchi Sea continental slope was used to determine its age since formation over the shelf environment. Because the eddy can be shown to have been generated near the shelf break, initial conditions for several age-dependent tracers could be relatively well constrained. A combination of 228Ra/226Ra, excess 224Ra, and 228Th/228Ra suggested an age on the order of months. This age is consistent with the presence of elevated concentrations of nutrients, organic carbon, suspended particles, and shelf-derived neritic zooplankton within the eddy compared to ambient offshore water in the Canada Basin but comparable to values measured in the Chukchi shelf and shelf-break environment. Hence this feature, at the edge of the deep basin, was poised to deliver biogeochemically significant shelf material to the central Arctic Ocean.
机译：2004年9月在楚科奇海大陆坡上对冷核，反气旋涡进行了放射性同位素评估，以此来确定其在陆架环境中形成以来的年龄。由于可以证明涡流是在架子断裂附近产生的，因此几个年龄相关示踪剂的初始条件可能受到相对较好的约束。 228Ra / 226Ra，过量224Ra和228Th / 228Ra的组合表明年龄大约为几个月。与加拿大盆地周围的近海水相比，该年龄与涡流内营养物质，有机碳，悬浮颗粒和源自陆架的中性浮游动物的浓度升高相一致，但与楚科奇陆架和陆架断裂带测得的值相当环境。因此，该特征位于深海盆地的边缘，已准备好将具有生物地球化学意义的重要架子材料运送至北冰洋中部。

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