...
  • 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 >Surface current patterns in front of the Venice Lagoon
【24h】

Surface current patterns in front of the Venice Lagoon

机译：威尼斯泻湖前的表面电流模式

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

Surface patterns of the low-frequency current in a 20 × 30 km region in front of the Venice Lagoon were analysed from a 13-month-long HF radar data set. Surface circulation was related to prevalent wind regimes in the area and to the tidal flow through the lagoon inlet. Three different categories of wind-forcing were defined: bora (NE wind), sirocco (SE wind), and finally the category containing all other wind directions and calms (winds lower than 3 m/sec). Mean flow and vorticity spatial distributions were discussed for different wind conditions. The coastal area about 5 km wide is characterized by a flow field with maximum vorticity. Outside the coastal boundary layer the interior flow is part of the Adriatic basin-wide cyclonic circulation. Two counter-rotating vortices of the dimension of about 4-5 km were evidenced in the average flow field in front of the lagoon inlet (Malamocco inlet) in all situations except for the bora. The vortex-pair is probably associated with the tidal flow through the inlet. The bora wind induces a strong southward coastal jet detached from the coast by about 5 km homogenizing the flow and eliminating the dipole. The average coastal flow pattern in calm wind conditions was also analysed as a function of the strong inflow/outflow (currents in the inlet > 0.7 m s~(-1)) from the lagoon inlet. In both cases the vorticity pattern is similar, with the negative vorticity to the left of the inlet and positive to the right looking seaward.
机译：根据长达13个月的高频雷达数据集，对威尼斯泻湖前方20×30 km地区的低频电流的表面模式进行了分析。地表环流与该地区的普遍风况以及通过泻湖入口的潮流有关。定义了三种不同的强迫风类别：bora（NE风），sirocco（SE风），最后是包含所有其他风向和平静（风速低于3 m / sec）的类别。讨论了不同风况下的平均流量和涡度空间分布。约5公里宽的沿海地区的特征是流场具有最大涡度。在沿海边界层之外，内部流动是亚得里亚海盆地范围内旋风循环的一部分。在除鲍拉外的所有情况下，在泻湖入口（马拉莫科入口）前方的平均流场中，均出现了两个大小约为4-5 km的反向旋转涡流。涡旋对可能与通过进口的潮流有关。柏拉风引起大约5 km的均流并消除偶极子，从而使强烈的向南沿海喷流与海岸分离。还分析了平静风条件下沿海平均流量的变化规律，它是泻湖入口强力流入/流出的函数（入口处的电流> 0.7 m s〜（-1））。在这两种情况下，涡度图都是相似的，负涡度在入口的左侧，正涡度在向右看向海的方向。

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