Evaluating sea ice influence on water exchange dynamics through three-dimensional hydrodynamic simulation in a semi-closed shallow sea

IF 4.8 2区环境科学与生态学 Q1 OCEANOGRAPHY

Ocean & Coastal Management Pub Date : 2024-10-13 DOI:10.1016/j.ocecoaman.2024.107428

Na Zhang , Shuaiqi Liang , Keh-Han Wang , Qinghe Zhang , Ning Xu , Ya Ping Wang , Zhifa Wu , Tao Wang

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Abstract

To understand the capacity of water exchange of semi-closed nearshore shallow waters during winter, this study investigates the effect of sea ice on water exchange dynamics under extreme cold wave conditions by developing a coupled three-dimensional simulation tool and taking the Bohai Sea as a case study. This coupling model integrates the hydrodynamic model, wave model, sea ice model, and Lagrangian particle tracking model. The results demonstrate that sea ice inhibits water exchange in the northern Liaodong Bay due to a clockwise residual circulation. Conversely, sea ice enhances water exchange in the southwestern areas, specifically Bohai Bay and Laizhou Bay. This conclusion is supported by further calculations and analyses of half-life time and volumetric flow rate. Considering the impact of adjacent bays, the percentage of residual particles in the southern area after simulating a severe ice period is 33.5% higher compared to scenarios without this consideration. Finally, the uncertainty of the model was evaluated by altering the quantity of tracer particles, and the validity of the model results was confirmed through comparisons with measured chlorophyll-a and dissolved inorganic nitrogen concentrations. These findings are significant for management departments to develop effective strategies for pollutant prevention and control.

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通过半封闭浅海的三维水动力模拟评估海冰对水交换动力学的影响

为了解冬季半封闭近岸浅海水体的水交换能力，本研究以渤海为例，通过开发三维耦合模拟工具，研究了极端寒潮条件下海冰对水交换动力学的影响。该耦合模型集成了水动力模型、波浪模型、海冰模型和拉格朗日粒子跟踪模型。结果表明，由于顺时针方向的残余环流，海冰抑制了辽东湾北部的水交换。相反，海冰增强了西南部地区，特别是渤海湾和莱州湾的水交换。对半衰期时间和容积流量的进一步计算和分析支持了这一结论。考虑到邻近海湾的影响，模拟严重冰期后，南部地区残留颗粒物的比例比未考虑这一因素的方案高出 33.5%。最后，通过改变示踪粒子的数量评估了模型的不确定性，并通过与测量的叶绿素-a 和溶解无机氮浓度进行比较，确认了模型结果的有效性。这些发现对管理部门制定有效的污染物防控策略具有重要意义。

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

Ocean & Coastal Management 环境科学-海洋学

CiteScore

8.50

自引率

15.20%

发文量

321

审稿时长

60 days

期刊介绍： Ocean & Coastal Management is the leading international journal dedicated to the study of all aspects of ocean and coastal management from the global to local levels. We publish rigorously peer-reviewed manuscripts from all disciplines, and inter-/trans-disciplinary and co-designed research, but all submissions must make clear the relevance to management and/or governance issues relevant to the sustainable development and conservation of oceans and coasts. Comparative studies (from sub-national to trans-national cases, and other management / policy arenas) are encouraged, as are studies that critically assess current management practices and governance approaches. Submissions involving robust analysis, development of theory, and improvement of management practice are especially welcome.