Wave influence on water circulation and self-purification ability in a semi-enclosed sea

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2025-03-20 DOI:10.1016/j.csr.2025.105461

Fengze Zhao , Yuanyi Li , Dekui Yuan , Kok Weng Tan , Jian Sun

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引用次数: 0

Abstract

Owing to significant variation in waves, studying the effects of waves on water exchange in semi-enclosed seas is challenging, and current knowledge on this subject is insufficient, which hinders effective management of coastal seas. In this study, wave-current coupled and water age models were established to investigate the influence of waves on water exchange in the Bohai Sea, China. The results show that waves do not affect basin-scale circulation in the Bohai Sea, and their effects on water exchange are restricted to nearshore regions, especially in estuaries with subaqueous deltas. Wave-induced age variation is around 5 %, peaking at 16 % nearshore. The wave effects on basin-scale water exchange are an order of magnitude smaller than those induced by winds, yet they govern the exchange process near the Yellow River Estuary. Analysis of age distributions with and without waves indicates that wind fetch and topographic conditions are important factors in determining the wave influence on currents. Wind and storm statistics suggest that north and northeast winds are dominant. Under these conditions, the nearshore regions in the south of the Bohai Sea and downwind areas experience strong wave forces. Due to drastic depth variations at the edges of subaqueous deltas, waves induce a strong longshore current flowing westward into Laizhou Bay, with the wave influence extending nearly 100 km.

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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.