...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Baroclinic tidal currents in the Gareloch, Scotland
【24h】

Baroclinic tidal currents in the Gareloch, Scotland

机译：苏格兰加雷洛奇的斜压潮流

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

Acoustic doppler current profiler, moored current meter and thermistor data were collected in the Gareloch, a sea loch on the west coast of Scotland, for 4 days during June 2001. The loch is approximately 8 km long, 40m deep in the interior and is separated from the Clyde estuary by a sill at a depth of 16 m with respect to mean sea level. The sill is situated in the Narrows at the mouth of the loch where the tidal currents are barotropic in character and reach maximum speeds of about 0.3 m/s. In the interior of the loch, where the barotropic tidal currents should not exceed 0.02-0.03 m/s, the flow was markedly baroclinic and reached speeds of 0.15 m/s in the surface layer. The surface and bottom layer flows displayed a 180° phase difference, with the lower layer flow being directed landward during the flood tide. The tidal currents did not display the expected semi-diurnal motion that is characteristic of the Clyde Sea and estuary. Instead, the motion was dominated by short period oscillations that appeared to be seiche related rather than due to shallow water tidal effects. A strong inflow event, observed at the mouth of the loch during a flood tide, was consistent with the presence of a density-driven current superimposed on the tidal flow. The thermistor data showed that the loch was thermally stratified with a surface layer of thickness 8-10 m. Simulations with a two-layered model that allowed for variable channel width and water depth reproduced the observed phase difference between the surface and bottom layers. The model results suggested that the short period variability in the observed currents was related to interfacial oscillations generated by the strong tidal flow above the sill.
机译：在2001年6月的4天中，在苏格兰西海岸的加勒洛赫（Gareloch）收集了多普勒电流剖面仪，系泊电流表和热敏电阻数据。该长约8公里，内部深40m，已分离在相对于平均海平面的16 m深度处的一个门槛处，从克莱德河口离开。窗台位于湖口的狭窄处，那里的潮流具有正压性，最高速度约为0.3 m / s。在湖泊内部，正压潮流不应超过0.02-0.03 m / s，水流明显为斜斜流，表层流速达到0.15 m / s。表层和底层流表现出180°的相位差，在洪水潮时，下层流向着陆。潮流没有显示出克莱德海和河口的预期的半日运动。取而代之的是，该运动主要由短时振荡主导，而短时振荡似乎与塞歇尔有关，而不是由于浅水潮汐影响。在潮汐潮汐发生时，在湖口观测到强烈的入流事件，这与潮汐流上叠加的密度驱动电流的存在是一致的。热敏电阻数据显示，水ch被热分层，表面层厚度为8-10 m。使用两层模型进行的模拟（允许可变的通道宽度和水深）重现了表层和底层之间观察到的相位差。模型结果表明，观测电流的短时变化与门槛上方强潮汐流产生的界面振荡有关。

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