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Dynamics of the Block Island Sound Estuarine Plume

机译：布洛克岛声音河口羽流的动力学

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摘要

Buoyant discharge of freshwater from Long Island Sound (LIS) forms a seasonal buoyant plume outside Block Island Sound (BIS) between the coast of Long Island and the denser shelf waters. The plume's seasonal variability and its response to tides, winds, and surface heating are investigated through a series of process-oriented experiments using the Regional Ocean Modeling System (ROMS). Results show the importance of river discharge, wind directions, and surface heating in the seasonal variation of the BIS buoyant plume. In winter and spring, the plume is intermediate with a large surface offshore extension detached from the bottom. From winter to spring, the river discharge increases; meanwhile, upwelling-favorable winds keep dominating. They compete with the increase of surface heating and generate a broader buoyant plume in spring than in winter. In summer, the plume is bottom advected with most of its width in contact with the bottom and is featured with the steepest isopycnals and narrowest plume, which is driven by a combination of strong insolation, weak buoyant discharge from LIS, and feeble winds. In fall, although the river discharge is comparable to that in winter, the upwelling-favorable wind is relatively weaker, corresponding to a narrower intermediate plume.
机译：从长岛湾（LIS）浮出的淡水在长岛海岸和密集水域之间的Block Island Sound（BIS）外部形成了季节性浮羽。通过使用区域海洋建模系统（ROMS）进行的一系列面向过程的实验，研究了羽流的季节性变化及其对潮汐，风和表面加热的响应。结果表明，在BIS浮羽的季节变化中，河流流量，风向和地表加热的重要性。在冬季和春季，羽状流处于中间，从底部分离出大面积的海上延伸。从冬季到春季，河水流量增加。同时，上升流有利的风继续占主导地位。它们与地表热量的增加竞争，春季比冬季产生更多的浮羽。在夏季，羽状流向底部平移，其大部分宽度与底部接触，并具有最陡的等深线和最窄的羽状流，这是由于强烈的日照，弱弱的LIS浮力和弱风共同作用的结果。在秋季，尽管河流流量与冬季相当，但上升气流有利的风相对较弱，这意味着中间羽流较窄。

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  • 来源
    《Journal of Physical Oceanography》 |2016年第5期|1633-1656|共24页
  • 作者

    Liu Qianqian; Rothstein Lewis M.; Luo Yiyong;

  • 作者单位

    Univ Rhode Isl, Grad Sch Oceanog, 215 South Ferry Rd, Narragansett, RI 02882 USA|Univ Maine, Sch Marine Sci, Orono, ME USA;

    Univ Rhode Isl, Grad Sch Oceanog, 215 South Ferry Rd, Narragansett, RI 02882 USA;

    Ocean Univ China, Phys Oceanog Lab, Qingdao, Peoples R China;

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