...
  • 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 >Observations of the lateral structure of wind-driven flow in a coastal plain estuary
【24h】

Observations of the lateral structure of wind-driven flow in a coastal plain estuary

机译：沿海平原河口风流横向结构的观测

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

Wind-stress is one of the main drivers of estuarine circulation. The lateral structure of wind-induced flows in estuaries has been described mainly with analytical and numerical models. The aim of this study is to investigate, with observations, the lateral structure of wind-induced flow in a coastal plain estuary, the James River, Virginia. Such structure was explored with the first Empirical Orthogonal Function (EOF1) mode derived from month-long moored ADCPs deployed at two cross-sections in the estuary. Mode 1 explained 53% of the variance and was attributed to wind forcing. Its lateral structure (eigenvectors) consisted of upwind flow centered in the channel at middle depth, downwind flow over the shoals, and a vertically sheared bidirectional flow over the channel slope. Wavelet coherence analysis showed that along-estuary wind was highly coherent with mode 1 (coherence squared 0.9), especially at the period band between 4 and 6 days. The along-estuary wind stress and the temporal variation of mode 1 showed an anti-phase coherence, with the wind stress leading mode 1 persistently. In addition, an analytical solution showed a lateral structure similar to the eigenvectors obtained with EOF1. The conclusion is that the lateral structure described by EOF1 was induced by wind-stress and was consistent with analytical and numerical model results. These results are among the handful available that confirm the theoretical structure of wind-driven flows over laterally varying bathymetry.
机译：风的压力是河口循环的主要驱动力之一。河口风致流动的侧向结构主要用解析和数值模型进行了描述。这项研究的目的是通过观察来调查弗吉尼亚州詹姆斯河沿岸平原河口风致流动的横向结构。通过从河口两个断面部署的长达一个月的系泊ADCP得出的第一个经验正交函数（EOF1）模式来探索这种结构。模式1解释了53％的方差，并归因于风力。它的侧向结构（特征向量）包括以中深度为中心的逆风流，浅滩上的顺风流和沿通道斜面的垂直剪切双向流。小波相干分析表明，沿河口风在模式1下具有高度相干性（相干性平方> 0.9），尤其是在4至6天的周期带。沿河口风应力和模式1的时间变化表现出反相位相干性，风应力一直领先于模式1。此外，分析溶液显示出与用EOF1获得的特征向量相似的横向结构。结论是EOF1描述的侧向结构是由风应力引起的，并且与分析和数值模型结果一致。这些结果是少数可证实侧向变化的测深仪上的风流理论结构的数据。

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