当前位置: X-MOL 学术Reg. Stud. Mar. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Shallow-water circulation on the northern coast of Rio Grande do Sul, Brazil: A wave-dominated system
Regional Studies in Marine Science ( IF 2.1 ) Pub Date : 2021-08-18 , DOI: 10.1016/j.rsma.2021.101973
Mauro Michelena Andrade 1 , Elírio E. Toldo 1 , Pedro Veras Guimarães 2, 3 , Nicolas de Assis Bose 1
Affiliation  

Alongshore currents in the surf zone are formed after incident waves break. This process depends on the characteristics of the incident waves and can be altered by the wind, and to a lesser extent, by bathymetry and tide. In order to understand the behavior of the alongshore currents on the north coast of Rio Grande do Sul (Brazil), two datasets were obtained in the field. The first one was acquired during oceanographic moorings and is composed of long time series of wave data. The other database corresponded to direct measurements of vertical profiles of velocities and direction of alongshore currents in the surf zone, both simultaneously acquired for the first time in this coastal region. The analyses of these data sets enabled identification and quantification of the processes associated with incident waves and winds. Circulation by currents in the surf zone is induced by oblique incidence waves breaking as a result of radiation-stress energy flow. It was also noted that wind can influence alongshore currents to a lesser extent. The findings indicated that height and angle of incidence of waves was the main driving force of alongshore currents. A pattern has also been identified, in which waves that come from the southeast (SE) and northeast (NE) generate northeasterly and southwesterly fluxes, respectively.



中文翻译:

巴西南里奥格兰德北部海岸的浅水环流:波浪主导系统

海浪区的沿岸流是在入射波破裂后形成的。这个过程取决于入射波的特性,可以被风改变,在较小程度上受测深和潮汐影响。为了了解南里奥格兰德(巴西)北海岸沿岸洋流的行为,在现场获得了两个数据集。第一个是在海洋系泊期间获得的,由长时间的波浪数据组成。另一个数据库对应于对冲浪区沿岸水流的速度和方向的垂直剖面的直接测量,这两者都是在该沿海地区首次同时获得的。对这些数据集的分析能够识别和量化与入射波和风相关的过程。由于辐射应力能量流,斜入射波破裂导致海浪区中的电流环流。还注意到风可以在较小程度上影响沿岸洋流。研究结果表明,波浪的高度和入射角是沿岸流的主要驱动力。还确定了一种模式,其中来自东南 (SE) 和东北 (NE) 的波浪分别产生东北和西南通量。

更新日期:2021-08-27
down
wechat
bug