Surface circulation in Todos Santos Bay, Baja California, México

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2024-01-04 DOI:10.1016/j.csr.2024.105171

Reginaldo Durazo , Xavier Flores-Vidal , Rubén Castro , Francisco J. Ocampo-Torres , Johanna Saavedra , Isaac Rodríguez-Padilla , Marco Larrañaga

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Abstract

Depending on dimensions, orientation and topographic features, the circulation of semi-enclosed seas adjacent to regions of coastal upwelling are strongly influenced by their interaction with a shelf upwelling jet of adjacent waters. A special case are square bays, where opening is about the same size as length, and are bordered by headlands at the entrance. This study analyzed surface currents measured between 2009 and 2020 with high-frequency (HF) radar in Todos Santos Bay, a square bay located in northwestern México, to obtain mean and seasonal surface circulation patterns. HF radar measurements indicate that the average circulation pattern within the bay is cyclonic, with water of the California Current (CC) entering primarily as a coastal jet through the northern mouth of the bay. The similarity of monthly average maps with the long-term average suggests the cyclonic circulation persists year-round. Scale analysis demonstrates that given the size of the bay, only one eddy, primarily controlled by inertia, is dominantly formed inside. The mean cyclonic circulation defines the bay as an upwelling shadow.

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墨西哥下加利福尼亚托多斯桑托斯湾的地表环流

根据不同的尺寸、方向和地形特征，沿岸上升流区域附近的半封闭海域的环流受其与邻近海域陆架上升流喷流相互作用的强烈影响。方形海湾是一个特例，其开口大小与长度相等，入口处有岬角。本研究分析了 2009 年至 2020 年期间用高频雷达在托多斯桑托斯湾（位于墨西哥西北部的一个方形海湾）测量到的表层流，以获得平均和季节性表层环流模式。高频雷达测量结果表明，海湾内的平均环流模式为气旋式，加利福尼亚洋流（CC）的水流主要以沿岸喷流的形式从海湾北口进入。月平均分布图与长期平均分布图相似，表明气旋环流全年持续存在。尺度分析表明，考虑到海湾的面积，海湾内主要形成一个主要受惯性控制的漩涡。平均气旋环流将海湾定义为上升流阴影。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.