Submesoscale features of coastal upwellings in the Black Sea: Observations and modeling

IF 2.1 3区 地球科学 Q2 OCEANOGRAPHY
Arseny Kubryakov, Anna Aleskerova, Artem Mizyuk
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引用次数: 0

Abstract

Coastal upwellings significantly affect the thermohaline structure, gas exchange and the fluxes of nutrients in the upper layers. They are often characterized by complex spatial structure, which is related to impact of different factors – changes of bathymetry, impact of background currents, baroclinic instability and others. In this study, we use high-resolution NEMO numerical model-ling and satellite data to study in details several physical causes of the observed submesoscale features of the Black Sea coastal upwellings: . 1) the influence of capes on the separation of coastal upwelling from the coast and its further transformation into submesoscale eddies; 2) the influence of mesoscale eddies on the structure of coastal upwellings; 3) the role of river plumes and haline fronts in the transport of upwellings. Comparison of model and satellite data shows that the numerical calculations reasonably well reproduce the onset time, intensity and areas of upwellings. Further, we show that the discussed processes can significantly affect the intensity, evolution and propagation of coastal upwellings in the Black sea.

黑海沿岸上升流的次主题尺度特征:观测和建模
沿岸上升流对上层的温盐结构、气体交换和营养通量有重大影响。它们通常具有复杂的空间结构,这与不同因素的影响有关--水深变化、背景流的影响、气压不稳定性等。在这项研究中,我们利用高分辨率的 NEMO 数值模式和卫星数据,详细研究了观测到的黑海沿岸上升流次中尺度特征的几个物理原因:................1) 海角对沿岸上升流脱离海岸并进一步转化为亚中尺度漩涡的影响;2) 中尺度漩涡对沿岸上升流结构的影响;3) 河流羽流和卤化锋在上升流输送中的作用。对模式和卫星数据的比较表明,数值计算合理地再现了上升流的发生时间、强度和面积。此外,我们还表明,所讨论的过程会对黑海沿岸涌浪的强度、演变和传播产生重大影响。
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来源期刊
Continental Shelf Research
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.
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