Progress in Oceanography最新文献

Variability and forcings of high turbidity events in the northern Adriatic sea from analysis of in-situ long-term data: A methodological approach 从原位长期资料分析亚得里亚海北部高浊度事件的变率和强迫：方法方法

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-28 DOI: 10.1016/j.pocean.2025.103483

Francesco Riminucci , Davide Bonaldo , Lucilla Capotondi , Mariangela Ravaioli , Caterina Bergami

{"title":"Variability and forcings of high turbidity events in the northern Adriatic sea from analysis of in-situ long-term data: A methodological approach","authors":"Francesco Riminucci , Davide Bonaldo , Lucilla Capotondi , Mariangela Ravaioli , Caterina Bergami","doi":"10.1016/j.pocean.2025.103483","DOIUrl":"10.1016/j.pocean.2025.103483","url":null,"abstract":"<div><div>Long-term data series (2012–2021) of physical and oceanographic parameters at the LTER-Italy research site “Delta del Po and Costa Romagnola’’, encompassing the Po river delta and the surrounding coastal areas, were analyzed to investigate the variability of surface turbidity in the North-Western Adriatic shelf. This shallow coastal environment is characterized by high river runoff, strong variability in wind regimes (direction and speed) and sea state (wave height). Both meteorological and oceanographic factors drive the local pattern of surface turbidity. This study focuses on an in-situ data analysis to recognize the main forcing responsible for high surface turbidity events (HTEs) along the coastal area. The dataset analyzed combines surface optical turbidity and salinity data, along with meteorological, hydrographic, and wave data from fixed point observing systems. While the main and most intense turbidity events (NTU > 10) in the Po Delta area are primarily caused by suspended sediments from river floods and wind-driven resuspension events, the high correlation between turbidity and wave height indicates that waves are primary driving factors along the Emilia-Romagna coast southward. The results from this study provide a methodological approach based on thresholds and proxies of physical parameters for quantifying variations of HTEs and identifying their main forcing in coastal areas.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"235 ","pages":"Article 103483"},"PeriodicalIF":3.8,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143885926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Connection of central South China Sea current variability with tropical Rossby waves in the western North Pacific 南海中部海流变率与北太平洋西部热带罗斯比波的联系

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-24 DOI: 10.1016/j.pocean.2025.103481

Mac Euan D. Malugao , Sen Jan , Ming-Huei Chang , Tung-Yuan Ho , Yiing Jang Yang

{"title":"Connection of central South China Sea current variability with tropical Rossby waves in the western North Pacific","authors":"Mac Euan D. Malugao , Sen Jan , Ming-Huei Chang , Tung-Yuan Ho , Yiing Jang Yang","doi":"10.1016/j.pocean.2025.103481","DOIUrl":"10.1016/j.pocean.2025.103481","url":null,"abstract":"<div><div>This study investigates the connection between the current velocity variations in the central South China Sea (SCS) and westward-propagating tropical Rossby waves in the western North Pacific, using satellite altimeter observations and coastal tide-gauge data supplemented by numerical modeling. This work is focused on the dynamic link between the intraseasonal velocity oscillations observed in the central-eastern SCS in summer 2017 and the Rossby waves that impinge on the east coast of the Philippine Archipelago. Low-pass-filtered satellite sea level anomaly (SLA) data and coastal sea level records suggest that Rossby waves can propagate into the Celebes Sea and Sulu Sea, eventually reaching the central SCS. A three-dimensional, primitive equation model shows that Rossby wave-associated SLA signals transmit through the Philippine Archipelago to the central SCS via the Celebes Sea-Sibutu Passage-Sulu Sea-Mindoro Strait route, with modeled SLA propagation timings that are consistent with the observations. As the Rossby wave reaches the eastern Philippines, approximately one-third of the incident wave energy from a meridional section east of the Philippines (132°E, between 2°N and 15°N) is transmitted into the Celebes Sea and Luzon Strait, whereas approximately two-thirds of the energy is dissipated, transformed, or reflected along the Philippine coast. Approximately 15 % of the energy entering the Celebes Sea passes through the Sibutu Passage into the Sulu Sea, and ∼10 % exits the Mindoro Strait into the central SCS. These suggest that 2−5 % of the incident energy from the western North Pacific transmitted into the central SCS and influences sea level and velocity variations there.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"235 ","pages":"Article 103481"},"PeriodicalIF":3.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143885925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mapping internal lee wave generation and dissipation in the deep South China sea 南海深处内部背风波的产生和消散

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-19 DOI: 10.1016/j.pocean.2025.103474

Zhenhua Xu , Ji Li , Peiwen Zhang , Jia You , Jianping Gan

{"title":"Mapping internal lee wave generation and dissipation in the deep South China sea","authors":"Zhenhua Xu , Ji Li , Peiwen Zhang , Jia You , Jianping Gan","doi":"10.1016/j.pocean.2025.103474","DOIUrl":"10.1016/j.pocean.2025.103474","url":null,"abstract":"<div><div>Abyssal mixing induced by internal wave breaking has been proposed as an essential process that maintains and modulates the deep cyclonic circulation and meridional overturning circulation in the South China Sea (SCS). Previous studies have primarily focused on internal tides, leaving limited exploration on internal lee waves and their roles in mixing the SCS. This study represents the first basin-scale estimation of the lee-wave energy flux from the geostrophic flow and exploration of lee-wave-induced mixing in the SCS. Utilizing an improved spectra method with the synthetic full-scaled bathymetry, lee wave generation is estimated employing Bell theory with the outputs from the China Sea Multi-Scale Ocean Modeling System. The Luzon Strait (LS) features the strongest lee wave generation, reaching up to 19.7 GW. In the SCS interior, the total energy flux is estimated at 1.3 GW, with 70% occurring in the deep basin. In the basin area, energy flux from the mean flow surpasses that from eddy flow, whereas in the marginal area, the dominant energy flux is from eddy flow. This study reveals seasonal variation in lee wave generation, closely related to the seasonality of the deep-water overflow from the LS. The mixing driven by lee waves is found comparable with that driven by internal tides in the deep SCS basin. This study emphasizes the potentially significant lee wave energy and induced mixing in the deep SCS basin, which should be well-mapped and parameterized in ocean models for a better characterization of multiscale dynamics and energetics in the SCS.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"235 ","pages":"Article 103474"},"PeriodicalIF":3.8,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Presence of two eddies in close proximity drives large spatial and temporal heterogeneity in the euphotic zone 两个近距离涡旋的存在导致了光区的空间和时间异质性

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-18 DOI: 10.1016/j.pocean.2025.103476

Simon Ramondenc , Richard S. Lampitt , Maria Fredrika Norrbin , Anna Belcher , Wilken-Jon von Appen , Morten H. Iversen

{"title":"Presence of two eddies in close proximity drives large spatial and temporal heterogeneity in the euphotic zone","authors":"Simon Ramondenc , Richard S. Lampitt , Maria Fredrika Norrbin , Anna Belcher , Wilken-Jon von Appen , Morten H. Iversen","doi":"10.1016/j.pocean.2025.103476","DOIUrl":"10.1016/j.pocean.2025.103476","url":null,"abstract":"<div><div>Oceanic mesoscale structures, such as eddies, play a fundamental role in ocean circulation, ocean biogeochemical cycles and plankton ecology. They cause lateral and vertical advection, as well as interact with vertical mixing, which is predicted to promote episodic fluxes of macronutrients to the surface ocean. However, the interactions between mesoscale eddies can generate submesoscale fronts and filaments occurring over short temporal and spatial scales and thus their impact on ocean biogeochemistry has been difficult to characterize. During an expedition to the Porcupine Abyssal Plain (PAP) site in the Northeast Atlantic in June 2013, we studied the interface between a cyclonic and an anticyclonic eddy, measuring nutrient and chlorophyll-a concentrations, zooplankton abundance and community structure, and marine snow aggregate abundance and sinking velocities. We observed that eddy rotation and a storm event induced, respectively, lateral stirring and vertical mixing of the two distinct water masses, driving spatial and temporal biogeochemical heterogeneity at the PAP site. Furthermore, we observe that diel and vertical variations in aggregate type and abundance were closely linked to the vertical distribution and abundance of zooplankton, suggesting that zooplankton were the main gatekeepers of carbon flux. Our findings suggest that the interactions between mesoscale structures could significantly modify organic carbon export, as well as provide sustenance for higher trophic levels, processes that have implications for fisheries and global climate.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"235 ","pages":"Article 103476"},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Significance of temperature and salinity in the dynamics of diatoms and dinoflagellates along the coastal Yellow Sea 温度和盐度对黄海沿岸硅藻和鞭毛藻动态的意义

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-18 DOI: 10.1016/j.pocean.2025.103478

Chenshi Weng , Dongsheng Ding , Qian Yang , Lin Zhu , Jun Sun , Keming Qu , Zhengguo Cui , Yuqiu Wei

{"title":"Significance of temperature and salinity in the dynamics of diatoms and dinoflagellates along the coastal Yellow Sea","authors":"Chenshi Weng , Dongsheng Ding , Qian Yang , Lin Zhu , Jun Sun , Keming Qu , Zhengguo Cui , Yuqiu Wei","doi":"10.1016/j.pocean.2025.103478","DOIUrl":"10.1016/j.pocean.2025.103478","url":null,"abstract":"<div><div>Diatoms and dinoflagellates are two typical functional groups of phytoplankton, which account for a major part of global primary production and play an important role in ecosystem processes and biogeochemical cycles. It is well known that the dynamics of diatoms and dinoflagellates in the ocean are mainly driven by changes in hydrological conditions related to climate change and human activities. However, little is known about their ability to adapt to changing ocean environments, making it difficult to predict whether and how they will adapt. Analysis of field data from the coastal Yellow Sea (2021–2023) showed that temperature and salinity changes, driven by seasonal variations, notably affected the dynamics of diatoms and dinoflagellates. Moreover, the seasonal dynamics of these two groups exhibited distinct responses to temperature, salinity, and their interactions. Specifically, diatoms exhibited greater heat resistance than dinoflagellates, but were more sensitive to salinity changes, often dominating during the warmer, less saline summer and autumn seasons. In contrast, dinoflagellates, due to their nutritional strategies, showed greater tolerance to salinity changes and often co-dominated with diatoms under high salinity conditions. Overall, changes in temperature and salinity had a large impact on diatoms and dinoflagellates in coastal Yellow Sea, albeit with different relationships. Therefore, future research should focus on the long-term effects of combined temperature and salinity changes, as well as the potential influence of other environmental variables such as nutrient availability.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103478"},"PeriodicalIF":3.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The role of the Atlantic-Ionian stream in the long-term variability of the surface circulation in the Northern Ionian Sea: Results from a hindcast simulation 大西洋-爱奥尼亚流在北爱奥尼亚海地表环流长期变率中的作用：后播模拟的结果

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-05 DOI: 10.1016/j.pocean.2025.103472

E. Napolitano , A. Carillo , M.V. Struglia , R. Iacono , M. Palma , G.L. Eusebi Borzelli , G. Sannino

{"title":"The role of the Atlantic-Ionian stream in the long-term variability of the surface circulation in the Northern Ionian Sea: Results from a hindcast simulation","authors":"E. Napolitano , A. Carillo , M.V. Struglia , R. Iacono , M. Palma , G.L. Eusebi Borzelli , G. Sannino","doi":"10.1016/j.pocean.2025.103472","DOIUrl":"10.1016/j.pocean.2025.103472","url":null,"abstract":"<div><div>We examine the long-term variability of the near-surface circulation of the Ionian Sea. Our analysis primarily focuses on a high-resolution hindcast simulation of the Mediterranean dynamics from 1981 to 2010. This time period is significant as it includes a notable near-surface circulation reversal in the Northern Ionian Sea (NIS), which shifted from anticyclonic to cyclonic at the end of 1997. This transition has been previously documented by altimeter data and Copernicus reanalysis. Our hindcast simulation accurately captures this change. Here we examine the temporal and spatial scales of the near-surface circulation during the transition and investigate the factors contributing to the observed variability of the basin dynamics, including local wind-stress, deep-water density anomalies, and the lateral current associated with the Atlantic Ionian Stream (AIS). We find that while wind stress does play a role, the primary factor driving long-term variability in the NIS near-surface circulation is the AIS. During the late 1980s to mid-1990s, the AIS was weak and local cyclonic winds were also weak, allowing the AIS to enter the NIS along the coasts of Sicily. This led to the formation of a wide anticyclonic cell in the NIS. From the mid-1990s to 2010, the AIS was stronger and, favored by stronger cyclonic winds, detached from the coasts of Sicily heading directly towards the Levantine basin without penetrating the NIS. This process led to the formation of a wide cyclonic cell over the NIS. These results highlight the role of the AIS in controlling the circulation of the NIS.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103472"},"PeriodicalIF":3.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trophic niche shifts in Japanese anchovy, Engraulis japonica, during ontogenetic migration in a temperate continental shelf system 温带大陆架系统中个体发生迁移过程中日本凤尾鱼的营养生态位变化

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-02 DOI: 10.1016/j.pocean.2025.103471

Changseong Kim , Jaebin Jang , Jaesik Yang , Jang Han Choi , Hee Yoon Kang , Seong Yong Moon , Ho Young Soh , Heeyong Kim , Chang‑Keun Kang

{"title":"Trophic niche shifts in Japanese anchovy, Engraulis japonica, during ontogenetic migration in a temperate continental shelf system","authors":"Changseong Kim , Jaebin Jang , Jaesik Yang , Jang Han Choi , Hee Yoon Kang , Seong Yong Moon , Ho Young Soh , Heeyong Kim , Chang‑Keun Kang","doi":"10.1016/j.pocean.2025.103471","DOIUrl":"10.1016/j.pocean.2025.103471","url":null,"abstract":"<div><div>Understanding the mechanisms driving ontogenetic niche shifts in fishes has predominantly focused on dietary changes in large predatory migrants. This study investigates trophic niche dynamics in a small, pelagic migratory fish, the Japanese anchovy (<em>Engraulis japonicus</em>). By mapping migratory paths across varied oceanographic regions on a temperate continental shelf of Korean waters, we quantified changes in the trophic niche using δ<sup>13</sup>C and δ<sup>15</sup>N values across different ontogenetic stages (juvenile, subadult, and adult). We hypothesized that biological and ecological processes associated with fish ontogeny and migration cause trophic niche shifts. Results showed that juvenile anchovies had a narrow trophic niche, which expanded as they matured, indicating a shift from specialist to generalist feeding habits, unlike many large predatory fishes. Limited isotopic niche overlap among life stages suggested niche partitioning within inshore habitats where all stages coexist. Morphological and behavioral traits related to life history likely drive these feeding modes and prey use changes. Isotopic profiles varied with migratory routes, reflecting spatial variations in zooplankton isotope baselines. Adults showed higher δ<sup>13</sup>C in the southern offshore (Yangtze River Diluted Water area) and lower δ<sup>15</sup>N in the eastern offshore (Tsushima Warm Current area) compared with inshore (South Korea Coastal Water area), resulting in distinct isotopic niches. This isotopic variation is likely due to differing lower trophic-level processes and zooplankton assemblages, as supported by our dietary mixing model. Our findings highlight that ontogenetic changes in feeding habits and adaptive responses to prey availability along their migratory paths facilitate trophic niche shifts in Japanese anchovy.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103471"},"PeriodicalIF":3.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wind-driven upwelling in the Adriatic Sea: Coastal vs. open-sea processes 亚得里亚海的风驱动上升流：沿海与公海过程

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-04-02 DOI: 10.1016/j.pocean.2025.103470

Mirko Orlić , Gordana Beg Paklar , Tomislav Džoić , Petra Lučić Jelić , Iva Međugorac , Hrvoje Mihanović , Stipe Muslim , Miroslava Pasarić , Zoran Pasarić , Antonio Stanešić

{"title":"Wind-driven upwelling in the Adriatic Sea: Coastal vs. open-sea processes","authors":"Mirko Orlić , Gordana Beg Paklar , Tomislav Džoić , Petra Lučić Jelić , Iva Međugorac , Hrvoje Mihanović , Stipe Muslim , Miroslava Pasarić , Zoran Pasarić , Antonio Stanešić","doi":"10.1016/j.pocean.2025.103470","DOIUrl":"10.1016/j.pocean.2025.103470","url":null,"abstract":"<div><div>The paper concentrates on the east Adriatic and a ten-day (20–29 May 2017) interval when a research cruise has been carried out, when the bottom probes have been operating close to the coast, and for which the satellite data have been available. Meteorological modeling has shown that two pulses of northern winds occurred at the time. The shipborne CTD and ADCP data collected on 28 May 2017 revealed a dense-water dome, with the surface cyclonic circulation developed around it, at a distance of 15–20 km from the coast. The temperature bottom probes and SST satellite sensors pointed to a decrease of temperature on two occasions, around 21 and 25–27 May 2017, close to the coast. The coincidence of the wind pulses with these processes in the sea indicated that they could be interpreted in terms of the wind-driven open-sea and coastal upwelling. In order to verify the interpretation, a simple analytical model has been developed and a combination of meteorological and oceanographic numerical modeling, with the wind field decomposed into the curl and curl-free components using the Helmholtz-Hodge approach, has been utilized. The theory and numerical simulations showed that the open-sea upwelling was related to the wind-curl effect while the coastal upwelling was controlled by interaction of the boundary and wind-curl effects. The phenomena were influenced by a positive feedback mechanism, which is more pronounced in shallow basins than in deep basins. This suggests that comparative studies of upwelling phenomena in different basins may be useful.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103470"},"PeriodicalIF":3.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143816302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ocean mixed layer depth 2000–2020: Estimation assessment and long-term trends 2000-2020年海洋混合层深度：估算、评估和长期趋势

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-03-22 DOI: 10.1016/j.pocean.2025.103467

Haochen Tang , Chen Wang , Huimin Li , Yijun He

{"title":"Ocean mixed layer depth 2000–2020: Estimation assessment and long-term trends","authors":"Haochen Tang , Chen Wang , Huimin Li , Yijun He","doi":"10.1016/j.pocean.2025.103467","DOIUrl":"10.1016/j.pocean.2025.103467","url":null,"abstract":"<div><div>Accurate estimation of mixed layer depth (MLD) is crucial for understanding the upper ocean dynamics as well as their implications on climate and marine ecosystems. While various methods have been proposed to estimate MLD from vertical temperature and/or density profiles, a systematic evaluation across different algorithms remains untapped. In this study, twelve approaches for MLD estimation are implemented and compared based on the Argo profiles collected from 2000 to 2020. Each method is assessed based on the quality index (QI), which measures the uniformity of temperature or density profiles within the boundaries of the estimated MLD. We found the two methods of linear fitting and relative variance exhibit similar QI levels higher than the others. A ranking scheme for that the method with the highest QI for a given profile earns one score is then designed and applied. The linear fitting one obtains the highest and is thus recommended as the most reliable method for geophysical analysis. The global MLD patterns derived using this method are analyzed with extremes being predominantly found in mid-latitudes due to strong seasonal variations. Significant long-term changes are observed, particularly in the southern hemisphere during summer, where the MLD shows a deepening trend over the past 20 years. Results presented here shall provide valuable insights for choosing the most reliable MLD estimation methods and understanding the environmental drivers of MLD variations.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103467"},"PeriodicalIF":3.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Internal wave energetics and interactions with mesoscale structures in the Sicily Channel area 西西里岛海峡地区内波能量学及其与中尺度结构的相互作用

IF 3.8 3区地球科学

Progress in Oceanography Pub Date : 2025-03-21 DOI: 10.1016/j.pocean.2025.103465

Robin Rolland , Pascale Bouruet-Aubertot , Yannis Cuypers , Aurélie Albert , Julien Le Sommer

{"title":"Internal wave energetics and interactions with mesoscale structures in the Sicily Channel area","authors":"Robin Rolland , Pascale Bouruet-Aubertot , Yannis Cuypers , Aurélie Albert , Julien Le Sommer","doi":"10.1016/j.pocean.2025.103465","DOIUrl":"10.1016/j.pocean.2025.103465","url":null,"abstract":"<div><div>The Sicily Channel plays a crucial role in the general circulation of the Mediterranean Sea. However, the internal wave dynamics is still sparsely characterized in this area which is a hotspot for internal tides. Here, we benefit from a high-resolution model of the Mediterranean Sea with and without tidal forcings to study the synoptic internal wave dynamics in the Sicily Channel area as well as their interactions with the (sub)mesoscale field. We found strong semi-diurnal internal tide generation in the Sicily Channel and the Messina Strait. Diurnal internal tides are generated in the Sicily Channel, Pelagie Islands and the Malta Plateau, and are bottom-trapped because of their sub-inertial frequency. In contrast near-inertial waves are mainly generated in winter in the Tyrrhenian Sea and the northern Ionian Sea. We show that the geometry of the Sicily Channel prevents near-inertial wave to propagate through it. Near-inertial waves are trapped in anticyclonic eddies. In summer, we show that diurnal-inertial internal waves generated by the intense thermal breeze near coastal areas are trapped in anticyclonic eddies with an effective inertial frequency close to the diurnal frequency even far from 30°N of latitude. Implications for turbulence and mixing are discussed. We present indirect evidence of an enhanced forward energy cascade in the presence of tidal motions. Future work will focus on the impact of tidal motions on the energy cascade using a nested non-hydrostatic numerical simulation.</div></div>","PeriodicalId":20620,"journal":{"name":"Progress in Oceanography","volume":"234 ","pages":"Article 103465"},"PeriodicalIF":3.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0