Continental Shelf Research最新文献_第10页

Characterization of two channels of the Chiloé Inland sea used by aquaculture farming: An observational approach to water exchange chilo<s:1>内海水产养殖用两条渠道的特征：水交换的观测方法

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-10-01 Epub Date: 2025-07-09 DOI: 10.1016/j.csr.2025.105512

Zeneida Wong , Richard Muñoz , Marcus Sobarzo

This study characterizes the hydrodynamics of the Dalcahue and Yal channels, key aquaculture areas within the Chiloé Inland Sea (CIS). It demonstrates the significant influence of bathymetric constrictions on local circulation patterns, tidal modulation, and biogeochemical variability. Dalcahue exhibits distinct bidirectional residual flows, characterized by intensified central inflows (NW-NE) and reinforced outflows (SE-SW) along the Quinchao coast, driven by channel curvature and bathymetry, with velocities reaching up to 70 cm/s in constrictions. In contrast, Yal shows a weak surface residual layer and persistent northwestward mid-depth flow, indicative of vertical tidal energy variations. Semidiurnal tidal forcing (M2, S2) predominantly drives current variability, explaining 50–75 % of observed fluctuations. A significant presence of the M4 overtide (up to 33 % in C2) highlights non-linear tidal interactions, crucial for understanding tidal asymmetry and net material transport. Weak correlations between sea level and dissolved oxygen suggest that strong tidal currents and mixing in constrictions counteract stratification, ventilating deeper layers. These findings enhance our understanding of physical oceanography in the context of the CIS, providing vital insights for environmental management and aquaculture planning by highlighting the role of constriction-induced hydrodynamics in estuarine systems worldwide.

本研究描述了chilo内海（CIS）内主要水产养殖区Dalcahue和Yal河道的水动力学特征。它证明了水深收缩对局部环流模式、潮汐调制和生物地球化学变异的显著影响。达尔卡休表现出明显的双向残余流，其特征是在通道曲率和水深测量的驱动下，沿昆潮海岸中心流入（NW-NE）增强，流出（SE-SW）增强，收缩时速度可达70厘米/秒。而Yal则表现出微弱的表层残留层和持续的西北中深流，表明垂直潮能的变化。半日潮强迫（M2, S2）主要驱动洋流变率，解释了观测到的波动的50 - 75%。M4溢出的显著存在（在C2中高达33%）突出了非线性潮汐相互作用，这对于理解潮汐不对称性和净物质输送至关重要。海平面和溶解氧之间的弱相关性表明，强烈的潮汐流和收缩的混合抵消了分层，使更深的层通风。这些发现增强了我们在CIS背景下对物理海洋学的理解，通过强调收缩引起的水动力学在全球河口系统中的作用，为环境管理和水产养殖规划提供了重要的见解。

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引用次数: 0

Horizontal and vertical distribution of fish larvae in the main entrance of Bahía de La Paz, Gulf of California (October 2022) 加州湾Bahía de La Paz主入口鱼类幼虫的水平和垂直分布（2022年10月）

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-22 DOI: 10.1016/j.csr.2025.105510

Rosabel Camacho-Gastélum , Laura Sánchez-Velasco , Sylvia P.A. Jiménez-Rosenberg , Victor M. Godínez , Francisco J. García-Rodríguez , Elvia D. Sánchez-Pérez , José F. Domínguez-Contreras

Bahía de La Paz, characterized by high biological diversity, presents an intense interchange with the Gulf of California, where Alfonso Basin is located. Horizontal and vertical distribution of fish larvae in the Alfonso Basin was analyzed in relationship with the water column structure during October 2022. Two water masses were registered, the Gulf of California Water mass, from 140 m depth to surface, and Subtropical Subsurface Water mass, below the first water mass. Fish larvae were collected from three depth layers: the surface mixed layer, the oxycline and the hypoxic layer, which is characterized by low dissolved oxygen concentration (<44 μmol kg⁻¹). The highest average density of fish larvae (27.9 larvae per 100 m³) was in the surface mixed layer. Sixty-four taxa were recorded in this layer with Benthosema panamense, Selar crumenophthalmus and Syacium ovale as the dominant species. In the oxycline a mean density of 7.4 larvae per 100 m³ was recorded with 40 taxa. Triphoturus mexicanus, B. panamense and Vinciguerria lucetia were the dominant species. The lowest mean larval density was (1 larvae per 100 m³) in the hypoxic layer, where only 4 taxa were recorded. Results showed that the highest density and richness of larvae were found in the mixed and oxycline layer, where the Gulf of California Water was observed, contrasting with the low presence of larvae in the Subtropical Subsurface Water domain, water mass characterized by low dissolved oxygen concentration. Its vertical expansion in the main entrance of the Bahía de La Paz, might constrain the fish larvae distribution and survival.

Bahía de La Paz的特点是生物多样性高，与Alfonso盆地所在的加利福尼亚湾有密切的交流。分析了2022年10月阿方索盆地鱼类幼虫水平和垂直分布与水柱结构的关系。记录到两个水团，加利福尼亚湾水团，从140 m深度到地面，亚热带次表层水团，在第一个水团以下。从表层混合层、氧层和低氧层3个深度层采集鱼苗，低氧层溶解氧浓度较低（44 μmol kg−1）。鱼苗平均密度以表层混合层最高，为27.9条/ 100 m3；该层共记录到64个分类群，优势种为Benthosema panamense、Selar crumenophthalmus和Syacium ovale。氧斜层40个类群平均密度为7.4只/ 100 m3。优势种为墨西哥三角龙、巴拿马白背龙和白刺龙。低氧层平均幼虫密度最低（1只/ 100 m3），仅有4个类群。结果表明，在加利福尼亚湾水域的混合氧斜层中幼虫密度和丰富度最高，而在以溶解氧浓度低为特征的亚热带次表层水域中幼虫数量较少。它在Bahía de La Paz主入口的垂直扩张，可能会限制鱼类幼虫的分布和生存。

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引用次数: 0

Utility of satellite imagery in estimating coastal marine water attributes 卫星图像在估算沿海海水属性中的应用

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-20 DOI: 10.1016/j.csr.2025.105509

Abdul Majid, Natrah Ikhsan, Zafri Hassan

Coastal water resources are essential for sustaining biodiversity and community well-being, yet rapid population growth and climate change increasingly threaten their sustainability. Satellite remote sensing has emerged as a powerful tool for monitoring coastal water quality due to its extensive spatial coverage, cost effectiveness, and rapid data acquisition. The scientific community has seen considerable advances in recent years through these technologies. In view of these developments, this study presents a scoping review of 465 peer-reviewed journal articles published between 2019 and 2024, sourced from Scopus. The analysis identifies commonly used satellite platforms for assessing five critical water quality parameters chlorophyll-a (Chl-a), temperature, colored dissolved organic matter (CDOM), pH, and phosphate across predefined climatic zones and water types. We further examine prevalent algorithmic approaches and validation metrics. Findings indicate that most studies rely on data from Aqua, Sentinel, and Landsat satellites. Results also reveal that Chl-a and temperature are the most widely measured parameters, particularly in temperate and subtropical marine waters, whereas Arctic regions and freshwater systems remain understudied. Recent trends show a growing reliance on empirical and machine learning based algorithms, with root mean square error (RMSE) and coefficient of determination (R²) as the most common validation metrics. These results highlight the need for standardized validation protocols and expanded research efforts in underrepresented regions and parameters to enhance global water quality monitoring.

沿海水资源对维持生物多样性和社区福祉至关重要，但人口快速增长和气候变化日益威胁到其可持续性。卫星遥感由于其广泛的空间覆盖、成本效益和快速的数据获取，已成为监测沿海水质的有力工具。近年来，通过这些技术，科学界已经看到了相当大的进步。鉴于这些发展，本研究对2019年至2024年间发表的465篇同行评议期刊文章进行了范围审查，这些文章来自Scopus。该分析确定了常用的卫星平台，用于评估五个关键水质参数：叶绿素-a （Chl-a）、温度、彩色溶解有机质（CDOM）、pH值和磷酸盐，跨越预定的气候带和水类型。我们进一步研究了流行的算法方法和验证指标。研究结果表明，大多数研究依赖于Aqua、Sentinel和Landsat卫星的数据。结果还表明，Chl-a和温度是最广泛测量的参数，特别是在温带和亚热带海水中，而北极地区和淡水系统仍未得到充分研究。最近的趋势表明，越来越依赖于基于经验和机器学习的算法，均方根误差（RMSE）和确定系数（R2）是最常见的验证指标。这些结果强调需要标准化的验证方案，并在代表性不足的地区和参数中扩大研究工作，以加强全球水质监测。

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引用次数: 0

Molecular composition characteristics of marine Synechococcus reflect the highly environmental heterogeneity in the shelf seas 海洋聚囊球菌的分子组成特征反映了陆架海高度的环境异质性

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-05-30 DOI: 10.1016/j.csr.2025.105495

Jialin Li , Feng Shi , Huiwang Gao , Song Qin

Synechococcus, a dominant group of marine photosynthetic picophytoplankton, play a crucial role in primary productivity and carbon cycling within shelf seas. Its distribution patterns are highly sensitive to environmental changes, rendering it a valuable indicator for assessing ecosystem responses to both climate change and anthropogenic pressures. Nonetheless, the relationships between the genetic diversity of Synechococcus and environmental heterogeneity in the Bohai Sea and Yellow Sea have not been thoroughly explored. Here, we employed the high-throughput sequencing method to investigate the phylogenetic and phenogenetic diversity of Synechococcus in the Bohai and Yellow seas, revealing distinct genotype compositions depending on typical habitats. Regarding phylogenetic distribution, both S5.1 clades I and VI dominated in the Bohai Sea with an average proportion of 25.47 % and 26.20 %, respectively; while clades I and II became predominant in the Yellow Sea accounting for 47.72 % and 14.82 %, respectively. Phenogenetically, type 2 dominated in the Bohai Sea occupying 53.15 %; types 3a and 3dA were dominant in the Yellow Sea accounting for 49.51 % and 40.88 %, respectively. Temperature and salinity were identified as key environmental constraints influencing the distribution patterns of Synechococcus. At the sub-group level, clade IX and type 3dA showed distributions closely related to salinity, whereas types 3a were primarily influenced by dissolved oxygen. The findings underscored the significant correlations between the distribution patterns of Synechococcus and environmental properties, which were further supported by cluster results demonstrating similar patterns obtained through principal component analysis. These findings highlight the application potential of spatial niche analysis based on Synechococcus molecular markers in reflecting environmental changes in shelf seas. Future studies should focus on elucidating the molecular regulatory mechanisms governing the distribution patterns of Synechococcus, thereby providing a critical foundation for understanding the responses of keystone species to environmental stresses in shelf ecosystems.

聚球菌是海洋光合浮游植物的优势类群，在陆架海洋的初级生产力和碳循环中起着至关重要的作用。其分布格局对环境变化高度敏感，是评估生态系统对气候变化和人为压力响应的重要指标。然而，在渤海和黄海中，聚珠球菌的遗传多样性与环境异质性之间的关系尚未得到充分的探讨。本研究采用高通量测序方法对渤海和黄海聚囊球菌的系统发育和表型多样性进行了研究，揭示了不同典型生境下聚囊球菌的不同基因型组成。在系统发育分布上，S5.1支I和S5.1支VI在渤海地区占主导地位，平均占25.47%和26.20%；黄海以ⅰ支和ⅱ支为主，分别占47.72%和14.82%。表型上，渤海地区以2型为主，占53.15%；黄海以3a型和3dA型为主，分别占49.51%和40.88%。温度和盐度是影响聚珠球菌分布模式的关键环境制约因素。在亚群水平上，演化枝IX和3dA型的分布与盐度密切相关，而3a型主要受溶解氧的影响。这些发现强调了聚珠球菌的分布模式与环境特性之间的显著相关性，这进一步得到了聚类结果的支持，通过主成分分析获得了相似的模式。这些发现突出了基于聚珠球菌分子标记的空间生态位分析在反映陆架海环境变化方面的应用潜力。未来的研究应集中于阐明聚球菌分布模式的分子调控机制，从而为了解陆架生态系统中关键物种对环境胁迫的响应提供重要基础。

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引用次数: 0

Assessment of the sediment budget of the Kara and Laptev seas 喀拉海和拉普捷夫海沉积物收支的评估

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-09 DOI: 10.1016/j.csr.2025.105506

Valeriy Y. Rusakov , Тat'yana G. Kuz'mina , Ruslan A. Lukmanov

The rapid acceleration of global warming since the 20th century is expected to significantly influence sediment budget on the Siberian Arctic Shelf. However, comprehensive data on the sediment budget required to assess these changes remain insufficient. In this study, we evaluate sediment mass accumulation rates (MAR) in the extensive coastal Arctic seas, the Kara and Laptev seas, over the past 100 years based on ²¹⁰Pb dating with the RUS2023 model. Our results showed that MARs in the Gulf of Ob’ and Yenisei Bay are 1.37 and 1.4 g cm⁻² yr⁻¹, respectively. MARs in the Novaya Zemlya, Voronin and Sadko troughs are 1.46, 0.82 and 1.99 g cm⁻² yr⁻¹, respectively. MARs in the inner and outer Laptev Sea shelf are 1.26 and 0.72 g cm⁻² yr⁻¹, respectively. These values are at least ten times higher than previously estimated values obtained using AMS ¹⁴C dating over the past few thousand years. The unprecedented increase in the total mass sediment accumulation over the past 100 years may be due to accelerated coastal erosion and soil erosion in the Siberian River catchments, located in the permafrost zone.

预计自20世纪以来全球变暖的迅速加速将显著影响西伯利亚北极陆架的沉积物收支。然而，评估这些变化所需的沉积物收支的综合数据仍然不足。本研究基于RUS2023模式的210Pb测年，评估了近100年来北极广大沿海海域喀拉海和拉普捷夫海沉积物质量积累速率（MAR）。结果表明，Ob '湾和Yenisei湾的MARs分别为1.37和1.4 g cm−2 yr−1。在Novaya Zemlya、Voronin和Sadko槽中，火星分别为1.46、0.82和1.99 g cm−2 yr−1。拉普捷夫海陆架内外的火星含量分别为1.26和0.72 g cm−2 yr−1。这些值比过去几千年利用AMS 14C测年得到的估计值至少高出10倍。在过去的100年里，沉积物总量的空前增加可能是由于位于永久冻土带的西伯利亚河流域的海岸侵蚀和土壤侵蚀加速造成的。

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引用次数: 0

Comparing and improving different methods to quantify silt and clay abundance within estuarine mud 比较和改进不同方法量化河口泥中粉砂和粘土丰度

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-16 DOI: 10.1016/j.csr.2025.105508

G. Mariotti , A. Tweel , G. Gababa , A.K. Tymul

Estuarine mud (also referred to as “fine-material”) is comprised of clay and silt particles, whose settling velocity differs by up to four orders of magnitude. Hence, quantifying their relative abundance within the mud fraction is key to understand and predict estuarine mud dynamics. Here we improve this quantification, using mud from two differing estuaries, one with a low clay-mud ratio (Massachusetts, northeast coast of USA) and one with a high clay-mud ratio (South Carolina, southeast coast of USA). First, we compare four different laboratory methods (XRD, laser diffraction, pipette method, Owen tube) to estimate the clay-mud ratio. Estimates based on laser diffraction are confounded by the fact that particles in the 2–30 μm size class could be either silt or “hyper-stable clay aggregates”, but this can be resolved by using the particle size distribution of pure clay as a reference. With this correction, laser diffraction agrees with the other three methods. Second, we show that optical backscatter (turbidity) and acoustic backscatter provide – at least under laboratory settings – a good estimate of suspended clay and silt, respectively. These two measurements correctly estimate the clay-mud ratio of the two samples, and also provide an estimate of silt and clay settling velocity in still water. These velocities are consistent with those from standard settling tests (Owen tube). Turbidity and acoustic backscatter should be able to monitor suspended clay and silt concentration in the field, provided that sand is negligible.

河口泥（也被称为“细物质”）由粘土和淤泥颗粒组成，其沉降速度相差高达四个数量级。因此，量化它们在泥浆组分中的相对丰度是理解和预测河口泥浆动力学的关键。在这里，我们改进了这一量化，使用来自两个不同河口的泥浆，一个具有低粘土-泥浆比（马萨诸塞州，美国东北海岸），另一个具有高粘土-泥浆比（南卡罗来纳州，美国东南海岸）。首先，我们比较了四种不同的实验室方法（XRD，激光衍射，移液法，欧文管）来估计粘土-泥浆比。2-30 μm粒径的颗粒可能是粉砂或“超稳定粘土团聚体”，这一事实使基于激光衍射的估计混淆，但这可以通过使用纯粘土的粒径分布作为参考来解决。通过这种修正，激光衍射与其他三种方法一致。其次，我们表明光学后向散射（浊度）和声学后向散射（至少在实验室设置下）分别提供了悬浮粘土和淤泥的良好估计。这两个测量正确地估计了两个样品的粘土-泥浆比，也提供了淤泥和粘土在静水中沉降速度的估计。这些速度与标准沉降试验（欧文管）的结果一致。浊度和声波后向散射应该能够监测现场的悬浮粘土和淤泥浓度，前提是沙子可以忽略不计。

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引用次数: 0

Radionuclides and heavy metals in surface sediments of the Bering and Chukchi Seas: distribution, source identification, and risk assessment 白令海和楚科奇海表层沉积物中的放射性核素和重金属：分布、来源鉴定和风险评估

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-09 DOI: 10.1016/j.csr.2025.105507

Jing Lin , Qiangqiang Zhong , Rong He , Fule Zhang , Hao Wang , Liang Wang , Dekun Huang , Tao Yu

The Arctic region can no longer be considered a pristine environment, and radioactive and heavy metal pollution have become a growing concern. The present study was conducted to investigate the distributions, sources, and risk assessments of radionuclides and heavy metals in surface sediments from the Bering and Chukchi Seas. The mean activities of ⁴⁰K, ¹³⁷Cs, ²²⁸Th, ²²⁶Ra, ²²⁸Ra, ²³⁸U, and ²¹⁰Pb in sediments were 446, 0.97, 24.2, 27.6, 22.2, 23.6, and 72.8 Bq/kg, respectively. Radiological hazard indices suggested that the sediments did not pose a significant radiological risk to humans. The mean Cu, Pb, Cd, Cr, and Zn contents were 18.4, 14.1, 0.231, 47.2, and 88.7 μg/g, respectively. The geoaccumulation and pollution load indices demonstrated that heavy metal accumulation (Cu, Pb, Cd, and Zn) existed at some sites of the study area. Multivariate statistical analyses suggested that Cu, Pb, Cr, and Zn likely originated from natural sources, while Cd was derived from both natural processes and fossil fuel burning.

北极地区已不再是一个原始的环境，放射性和重金属污染日益成为人们关注的问题。本研究旨在调查白令海和楚科奇海表层沉积物中放射性核素和重金属的分布、来源和风险评估。沉积物中40K、137Cs、228Th、226Ra、228Ra、238U和210Pb的平均活度分别为446、0.97、24.2、27.6、22.2、23.6和72.8 Bq/kg。放射性危害指数表明，沉积物对人体不构成显著的放射性危害。Cu、Pb、Cd、Cr和Zn的平均含量分别为18.4、14.1、0.231、47.2和88.7 μg/g。地质累积和污染负荷指数表明，研究区部分站点存在重金属（Cu、Pb、Cd和Zn）累积。多变量统计分析表明，Cu、Pb、Cr和Zn可能来自自然来源，而Cd可能来自自然过程和化石燃料燃烧。

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引用次数: 0

Ingestion of prey intensifies microplastic load in Mediterranean commercial fish 食入猎物会加剧地中海商业鱼类的微塑料负荷

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-10 DOI: 10.1016/j.csr.2025.105496

Alessandra Cera , Silvia Secco , Iliana Matarazzi , Monica Orsini , Serena De Santis , Massimiliano Scalici

We describe the ingestion of plastics by four edible fish species from the Western Mediterranean Sea (Fiumicino, Italy): Micromesistius poutassou, Mullus barbatus, Sardina pilchardus, and Trachurus trachurus. Microparticles smaller than 1 mm, particularly blue fibres made of cellophane, are the most found in terms of size, colour, shape, and polymer. The highest level of contamination was found in Sardina pilchardus and in stomachs containing prey across all species. We have gathered evidence from commercially relevant fishes, of which two can be good bioindicators of microplastics (M. barbatus and T. trachurus), and one is poorly investigated (M. poutassou) in order to contribute to the overall assessments of the MP-induced risks for the Mediterranean ecosystem and human activity.

我们描述了来自西地中海（Fiumicino, Italy）的四种可食用鱼类对塑料的摄入：Micromesistius poutassou， Mullus barbatus， Sardina pilchardus和Trachurus Trachurus。小于1毫米的微粒，特别是由玻璃纸制成的蓝色纤维，在大小、颜色、形状和聚合物方面都是最常见的。污染程度最高的是沙丁鱼和所有物种的猎物胃。我们从与商业相关的鱼类中收集了证据，其中两种可以作为微塑料的良好生物指标（barbatus和T. trachurus），另一种研究较少（M. poutassou），以有助于对mp引起的地中海生态系统和人类活动风险的总体评估。

引用次数: 0

Residual flow in a deglaciated coastal bay with low freshwater input 低淡水输入的消冰海岸海湾的剩余流量

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-06 DOI: 10.1016/j.csr.2025.105505

Taylor Bailey, Lauren Ross, Cristian Rojas

The drivers of the tidal and residual flows in estuaries can vary spatially and temporally due to geomorphic complexities, fortnightly tides, and climatic influences. In this paper, we explore the mechanisms that give rise to the circulation patterns in Frenchman Bay, Maine, on the Eastern Coast of the USA, under varying freshwater input conditions and fortnightly tidal phases, using idealized simulations from a high-resolution, three-dimensional numerical model. The results of the simulations at the tidal timescale reveal a tidal asymmetry in vorticity, where vorticity generated during flood tide is not spun-down during the subsequent ebb. This asymmetry prompts the investigation of the residual circulation in the bay which is characterized by large tidal residual eddies. These eddies are found to persist in the depth-averaged residual flow regardless of the freshwater input or tidal phase, leading to the conclusion that the eddies are “geomorphically-constrained” in the bay. Analysis of the horizontal momentum terms and a simulation performed without Coriolis forcing demonstrates that the tidal stress terms predominantly balance the barotropic pressure gradient to give rise to the eddy patterns, while the Coriolis force acts to strengthen their vorticity. The eddies create a laterally sheared residual flow structure with depth, however the flow is more vertically sheared during the neap tide when the baroclinic pressure gradient plays a larger role. These findings demonstrate the persistence of tidal residual eddies regardless of freshwater input or fortnightly tidal phase in a geomorphically complex deglaciated coastal bay with low freshwater input.

由于地形的复杂性、两周潮汐和气候的影响，河口潮汐和剩余流量的驱动因素在空间和时间上都是不同的。在本文中，我们利用高分辨率三维数值模型的理想模拟，探讨了美国东海岸缅因州法国湾在不同淡水输入条件和两周潮汐相下产生环流模式的机制。在潮汐时标上的模拟结果揭示了涡度的潮汐不对称性，即在涨潮时产生的涡度在随后的退潮时不会被旋降。这种不对称性促使人们对海湾中以大的潮汐残余涡流为特征的残余环流进行研究。研究发现，无论淡水输入或潮汐相如何，这些涡流在深度平均剩余流中都持续存在，从而得出涡流在海湾中受到“地貌约束”的结论。对水平动量项的分析和在没有科里奥利力的情况下进行的模拟表明，潮汐应力项主要平衡正压梯度以产生涡旋型，而科里奥利力则加强了它们的涡度。小潮期间，斜压梯度作用较大，涡流形成横向剪切的深度残余流结构，而小潮期间，斜压梯度作用较大，残余流的纵向剪切作用更大。这些发现表明，在一个地形复杂、淡水量少、冰川消退的海岸海湾，无论淡水输入与否，潮汐残余涡流都是持续存在的。

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引用次数: 0

Semi-enclosed coastal systems of South America: compilation and dynamic-based classification 南美洲半封闭海岸系统：汇编和基于动态的分类

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research

Pub Date : 2025-09-01 Epub Date: 2025-06-02 DOI: 10.1016/j.csr.2025.105493

Óscar Álvarez-Silva , Juan F. Paniagua-Arroyave , Edgar Cantero , Guilherme C. Lessa , Diego Moreira , Lauren Ross , Pablo Santoro , Carlos A.F. Schettini , Megan E. Williams , Arnoldo Valle-Levinson

Semi-enclosed coastal water systems (SECS) provide essential ecological and economic services. Their sustainable use requires a baseline understanding of the physical dynamics that control their water quality, morphology, and environmental stability. This paper aims to provide an overview of the current state of knowledge on the physical processes in SECS in South America, a megadiverse region that encompasses five of the largest river systems in the world. To achieve this goal, we compiled data from satellite imagery, geological and hydrological maps, and peer-reviewed literature. The information derived from these sources allowed comparisons among systems according to the level of understanding of their local hydrodynamics. Moreover, a recent dynamic classification was employed to identify the main physical forcings of those SECS with sufficient data. 898 SECS were identified in the continent, including deltas, alluvial estuaries, and coastal lagoons. A review of over 500 peer-reviewed publications revealed that 74 systems exhibited enough data to render a dynamic classification possible. In addition, 18 SECS stood out by the advanced understanding of their physical processes. The analysis presented here synthesizes the current understanding and provides an outlook of future challenges. We emphasize the need for continued monitoring of these systems to inform management strategies and mitigate the impacts of environmental stressors.

半封闭沿海水系（SECS）提供必要的生态和经济服务。它们的可持续利用需要对控制水质、形态和环境稳定性的物理动力学有基本的了解。本文旨在概述南美洲SECS物理过程的知识现状，南美洲是一个包含世界上最大的五个河流系统的超级多样化地区。为了实现这一目标，我们从卫星图像、地质和水文地图以及同行评议的文献中收集了数据。从这些来源获得的信息允许根据对其局部流体动力学的理解水平在系统之间进行比较。此外，采用最新的动态分类方法，在数据充足的情况下确定了这些SECS的主要物理强迫。在大陆上确定了898个SECS，包括三角洲、冲积河口和沿海泻湖。一项对500多份同行评议出版物的审查显示，74个系统展示了足够的数据，使动态分类成为可能。此外，18个SECS因其对物理过程的先进理解而脱颖而出。本文的分析综合了当前的认识，并展望了未来的挑战。我们强调需要持续监测这些系统，为管理策略提供信息，并减轻环境压力因素的影响。

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