...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean Science Discussions >Observations of water masses and circulation with focus on the Eurasian Basin of the Arctic Ocean from the 1990s to the late 2000s
【24h】

Observations of water masses and circulation with focus on the Eurasian Basin of the Arctic Ocean from the 1990s to the late 2000s

机译：1990年代至2000年代后期以北冰洋欧亚盆地为中心的水团和环流观测

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The circulation and water mass properties in the Eurasian Basin are discussed based on a review of previous research and an examination of observations made in recent years within, or parallel to, DAMOCLES (Developing Arctic Modeling and Observational Capabilities for Long-term Environmental Studies). The discussion is strongly biased towards observations made from icebreakers and particularly from the cruise with R/V Polarstern 2007 during the International Polar Year (IPY). Focus is on the Barents Sea inflow branch and its mixing with the Fram Strait inflow branch. It is proposed that the Barents Sea branch contributes not just intermediate water but also most of the water to the Atlantic layer in the Amundsen Basin and also in the Makarov and Canada basins. Only occasionally would high temperature pulses originating from the Fram Strait branch penetrate along the Laptev Sea slope across the Gakkel Ridge into the Amundsen Basin. Interactions between the Barents Sea and the Fram Strait branches lead to formation of intrusive layers, in the Atlantic layer and in the intermediate waters. The intrusion characteristics found downstream, north of the Laptev Sea are similar to those observed in the northern Nansen Basin and over the Gakkel Ridge, suggesting a flow from the Laptev Sea towards Fram Strait. The formation mechanisms for the intrusions at the continental slope, or in the interior of the basins if they are reformed there, have not been identified. The temperature of the deep water of the Eurasian Basin has increased in the last 10 yr rather more than expected from geothermal heating. That geothermal heating does influence the deep water column was obvious from 2007 Polarstern observations made close to a hydrothermal vent in the Gakkel Ridge, where the temperature minimum usually found above the 600–800 m thick homogenous bottom layer was absent. However, heat entrained from the Atlantic water into descending, saline boundary plumes may also contribute to the warming of the deeper layers.
机译：欧亚盆地的环流和水质特性是根据对先前研究的回顾和对近年来在DAMOCLES（为长期环境研究开发北极模型和观测能力）中或与之平行的观测结果进行的讨论而讨论的。该讨论强烈偏向于破冰船的观测，尤其是在国际极地年（IPY）期间使用R / V Polarstern 2007进行的巡游中。重点是巴伦支海入海支流及其与弗拉姆海峡入流支流的混合。提议巴伦支海支流不仅对中间水产生贡献，而且对阿蒙森盆地以及马卡罗夫和加拿大盆地的大西洋层也贡献了大部分水。来自弗拉姆海峡分支的高温脉冲只有偶尔会沿着拉普捷夫海斜坡穿过加克尔山脊穿透到阿蒙森盆地。巴伦支海和弗拉姆海峡分支之间的相互作用导致在大西洋层和中间水域中形成侵入层。拉普捷夫海以北的下游发现的入侵特征与南森盆地北部和加克凯尔岭上空的入侵特征相似，表明从拉普捷夫海流向弗拉姆海峡。尚未确定大陆斜坡或盆地内部（如果在此进行了改造）侵入体的形成机制。在过去的10年中，欧亚盆地的深水温度升高，而不是地热加热所预期的温度。从2007年Polarstern的观测结果非常接近地热加热确实影响了深水柱，该观测结果靠近Gakkel Ridge的一个热液喷口，那里通常没有发现600-800 m厚的均质底层以上的最低温度。但是，从大西洋水中夹带的热量进入下降的盐分界羽也可能导致深层变暖。

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