Journal of Marine SystemsPub Date : 2026-03-01Epub Date: 2026-01-21DOI: 10.1016/j.jmarsys.2026.104184
Pavel A. Salyuk , Dmitry I. Glukhovets , Alexander A. Latushkin , Olga Yu. Kalinina , Elena A. Shtraikhert , Philipp V. Sapozhnikov , Sergey A. Mosharov , Igor E. Stepochkin , Nadezhda A. Lipinskaya , Maxim I. Gorbov , Svetlana K. Klimenko
{"title":"Corrigendum to “Extreme underestimation of satellite-derived chlorophyll-a concentration in the northwestern Weddell Sea during a phytoplankton bloom and its reasons” [Journal of Marine Systems, Volume 252, (2025), 104159, DOI: 10.1016/j.jmarsys.2025.104159]","authors":"Pavel A. Salyuk , Dmitry I. Glukhovets , Alexander A. Latushkin , Olga Yu. Kalinina , Elena A. Shtraikhert , Philipp V. Sapozhnikov , Sergey A. Mosharov , Igor E. Stepochkin , Nadezhda A. Lipinskaya , Maxim I. Gorbov , Svetlana K. Klimenko","doi":"10.1016/j.jmarsys.2026.104184","DOIUrl":"10.1016/j.jmarsys.2026.104184","url":null,"abstract":"","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"254 ","pages":"Article 104184"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146090837","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}
Journal of Marine SystemsPub Date : 2026-03-01Epub Date: 2026-02-12DOI: 10.1016/j.jmarsys.2026.104196
Francesca V. Search , Odette A. Vergara , Fabián J. Tapia , Sergio A. Navarrete , Pedro A. Figueroa , Loretto Contreras-Porcia , Gonzalo S. Saldías
{"title":"Circulation and hydrographic conditions in an upwelling-influenced bay of central Chile","authors":"Francesca V. Search , Odette A. Vergara , Fabián J. Tapia , Sergio A. Navarrete , Pedro A. Figueroa , Loretto Contreras-Porcia , Gonzalo S. Saldías","doi":"10.1016/j.jmarsys.2026.104196","DOIUrl":"10.1016/j.jmarsys.2026.104196","url":null,"abstract":"<div><div>Eastern Boundary Upwelling Systems (EBUS) are characterized by wind-driven circulation on seasonal and synoptic time scales. Most studies of shelf dynamics in these systems have focused on inter-annual or seasonal variability, whereas fewer have examined synoptic and diurnal processes that shape inner-shelf circulation. This study presents the first assessment of circulation and hydrographic variability in Algarrobo Bay, a small north-facing bay in central Chile, based on two months of in situ current, temperature, and wind measurements combined with satellite observations during spring–summer 2021–2022. Time series revealed strong variability at both synoptic (<span><math><mo>≥</mo></math></span> 40 h) and diurnal scales. Upwelling-favourable winds predominated, producing cold, stratified waters, and weak northeastward currents, whereas short episodes of downwelling-favourable winds generated a warmer, mixed water column, and strong southwestward flows. Tidal contributions to current variability were minor (<span><math><mrow><mo>≤</mo><mn>13</mn><mtext>%</mtext></mrow></math></span>). At diurnal scales, the mean wind cycle drove a two-layer current response that lagged the winds. These diurnal patterns were further modified during upwelling and downwelling events, shifting circulation from a two-layer to either barotropic or three-layer structures. These findings provide the first characterization of physical variability in Algarrobo Bay and suggest that local topography and wind forcing may create conditions resembling an upwelling shadow. These dynamics alternate between offshore exchange during downwelling and local retention during upwelling, with implications for the transport and retention of larvae, nutrients, and pollutants. In the context of climate-driven upwelling intensification, understanding such local dynamics becomes increasingly relevant for this and other upwelling-influenced bays.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"254 ","pages":"Article 104196"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147400491","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}
Journal of Marine SystemsPub Date : 2026-03-01Epub Date: 2026-01-23DOI: 10.1016/j.jmarsys.2026.104182
Tariq Alrushaid, Fahad Al Senafi
{"title":"The Arabian Gulf Oscillation (AGO): A recurrent dipolar mode of mesoscale eddy variability in the Gulf","authors":"Tariq Alrushaid, Fahad Al Senafi","doi":"10.1016/j.jmarsys.2026.104182","DOIUrl":"10.1016/j.jmarsys.2026.104182","url":null,"abstract":"<div><div>This study investigates the spatial and temporal variability of sea surface height (SSH) and associated mesoscale dynamics in the Arabian/Persian Gulf over a 28-year period (1993–2020) using GLORYS12V1 ocean reanalysis dataset from the Copernicus Marine Environment Monitoring Service. Two low-SSH regions, identified near 28.5°N, 50°E (northern eddy) and 26.4°N, 53°E (southern eddy), were found to govern much of the Gulf's mesoscale variability. These regions are characterized by pronounced SSH gradients and elevated eddy kinetic energy (EKE), particularly during summer when wind speeds and air-sea heat fluxes peak. The eddies align with zones of intensified surface cooling and vertical mixing, suggesting a role in Gulf Deep Water formation, further explored in a parallel study.</div><div>Seasonal analyses reveal a cyclonic summer circulation maintained by the Iranian Coastal Current and Gulf Coastal Current, which interact dynamically with the eddies and influence their development. On interannual timescales, SSH and EKE fields exhibit alternating intensification between the eddies, indicating asymmetric responses to regional dynamics and large-scale climate variability. EOF analysis reveals three dominant modes of SSH variability: a basin-scale north–south gradient (EOF1), a dipolar eddy mode (EOF2) linked to wind anomalies, and a southern eddy mode (EOF3) correlated with the Indian Ocean Dipole Mode Index (DMI). The dipolar variability and interannual asymmetries define a coherent, recurring oscillation in SSH and EKE between the two eddies. We propose this as the Arabian Gulf Oscillation (AGO), a previously undocumented low-frequency internal mode of the Gulf's mesoscale circulation, modulated by atmospheric forcing and climate variability.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"254 ","pages":"Article 104182"},"PeriodicalIF":2.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174830","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2025-11-29DOI: 10.1016/j.jmarsys.2025.104162
Maria E.A. Ishimaru , Carlos Noriega , Syumara Queiroz , Marcus Silva , Luís F. F. Mendonça , Ana C.R. de Albergaria-Barbosa , Basílio S. Neto , Renato da Silva Carreira , Pedro Melo , Pedro M. Meirelles , Gisele Olímpio da Rocha , Jailson Bittencourt Andrade , Cláudia V.S. Cavalcanti , Moacyr Araújo
{"title":"Physical and biogeochemical properties in Admiralty Bay and its connection with the Bransfield Strait, Antarctica, during the austral summers of 2019, 2022, and 2023","authors":"Maria E.A. Ishimaru , Carlos Noriega , Syumara Queiroz , Marcus Silva , Luís F. F. Mendonça , Ana C.R. de Albergaria-Barbosa , Basílio S. Neto , Renato da Silva Carreira , Pedro Melo , Pedro M. Meirelles , Gisele Olímpio da Rocha , Jailson Bittencourt Andrade , Cláudia V.S. Cavalcanti , Moacyr Araújo","doi":"10.1016/j.jmarsys.2025.104162","DOIUrl":"10.1016/j.jmarsys.2025.104162","url":null,"abstract":"<div><div>We investigated spatial (inside/outside) and temporal (austral summers of 2019, 2022, and 2023) variability of physical and biogeochemical properties in Admiralty Bay (AB) using in-situ data from CTD and seawater samples complemented by 2022/2023 Global Ocean Physics Analysis and Forecast product. Temperature (−1.0 to 0.2 °C), salinity (34.1 to 34.5), oxygen (246 to 340 μmol kg<sup>−1</sup>) presented significative differences between stations inside and outside the AB. Salinity was higher outside for all years, while temperature/oxygen was higher/lower (317.3 vs. 304 μmol kg<sup>−</sup>1) inside the bay in 2019 and outside the bay in 2022 and 2023. Transitional Zonal Water with Weddell Sea influence were dominant during all years, however in 2023, bottom waters outside AB exhibited modified Circumpolar Deep Water (mCDW). Higher oxygen apparent utilization (AOU) (52.6 vs. 40.0 μmol kg<sup>−1</sup>) and nitrate plus nitrite (28.0 vs. 25.0 μmol kg<sup>−1</sup>) was observed outside the AB, while phosphate was higher inside (1.6 vs. 1.2 μmol kg<sup>−1</sup>), resulting in distinct N:P ratios of 24:1 and 17:1, respectively. Those patterns indicate reduced respiration and more efficient vertical ventilation inside and higher oxygen consumption and remineralization outside the AB. While surrounding shelf waters showed signs of climate-driven intrusions and interannual variability, the interior of AB did not display major hydrographic shifts during the study period. The absence of mCDW signature inside the bay may be a consequence of intense vertical mixing and local circulation patterns, that can alter/inhibit mCDW intrusions. Still, high-resolution monitoring and modeling are required to resolve the mechanisms that control exchange processes and detect emerging climate signals in this Antarctic coastal system.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104162"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658442","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2025-11-29DOI: 10.1016/j.jmarsys.2025.104160
Antonio Sánchez-Díez , Airam N. Sarmiento-Lezcano , Jonah Díaz-Cruz , Santiago Hernández-León , José M. Landeira
{"title":"Vertical distribution of chaetognaths and their role as biological indicators of water masses in the Cape Verde frontal zone (NW Africa)","authors":"Antonio Sánchez-Díez , Airam N. Sarmiento-Lezcano , Jonah Díaz-Cruz , Santiago Hernández-León , José M. Landeira","doi":"10.1016/j.jmarsys.2025.104160","DOIUrl":"10.1016/j.jmarsys.2025.104160","url":null,"abstract":"<div><div>The Cape Verde Frontal Zone (CVFZ) is an area located in the southern boundary of the Canary Current. The interaction between the Cape Verde Front and the Mauritanian coastal upwelling promotes an area of highly dynamic water mass circulation, enhancing primary production and zooplankton biomass and abundance. Chaetognaths are a main component of zooplankton in oceanic areas, and they are poorly studied besides their important role as predators and their distribution matching specific water masses. Our aim was to study the effect of water mass dynamics on the distribution and abundance of the chaetognath community in an area of important water mass interaction, and to test their role as ocean bio-indicators. We studied the species composition, vertical distribution, size structure, and gonadal development of chaetognaths at six stations located at the CVFZ. Vertical stratified sampling covering epi- and mesopelagic depths were analyzed to assess the match of chaetognaths with different water masses. We found a total of 18 species of chaetognaths. The most frequent species was <em>Flaccisagitta enflata</em> (41.37 %), followed by <em>Serratosagitta serratodentata</em> (18.15 %), and <em>Pterosagitta draco</em> (14.92 %). The distribution patterns of six chaetognath species in the CVFZ were closely associated with oceanographic events and water masses, being <em>Eukrohnia hamata</em> a bio-indicator of Mauritanian upwelling. <em>Flaccisagita enflata</em> was associated with the mixed layer, <em>Decipisagitta decipiens</em> with the South Atlantic Central Water of 18 °C and <em>Decipisagitta sibogae</em> with the Northeast Atlantic Central Water of 15 °C<em>,</em> while <em>Eukrohnia fowleri</em> and <em>Caecosagitta macrocephala</em> were associated with the SubPolar Mode Water. These findings highlight the biodiversity of chaetognath community in the CVFZ and their importance to study their relationship with oceanic habitats in a scenario of climate change.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104160"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145658444","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2026-01-20DOI: 10.1016/j.jmarsys.2026.104183
Heather A. Stewart , Denise J.B. Swanborn , Elin A. Thomas , Jennifer A. Wainwright , Melanie S. Stott , Megan E. Cundy , Alan J. Jamieson
{"title":"Geomorphology and bait-attending hadal fauna of the Sui-shin hole (Philippine Basin, NW Pacific; 5616–6410 m)","authors":"Heather A. Stewart , Denise J.B. Swanborn , Elin A. Thomas , Jennifer A. Wainwright , Melanie S. Stott , Megan E. Cundy , Alan J. Jamieson","doi":"10.1016/j.jmarsys.2026.104183","DOIUrl":"10.1016/j.jmarsys.2026.104183","url":null,"abstract":"<div><div>The Sui-shin Hole, formerly referred to as the ‘Black Hole’, is a structurally complex area of the Philippine tectonic plate (NW Pacific Ocean) that attains a maximum water depth of 6410 m and is topographically isolated from all adjacent basins. Here we present new high-resolution bathymetry and geomorphological characterisation of the feature, and baited camera and trap lander data to examine patterns in bait-attending fauna, and other incidental fauna, across the abyssal-hadal transition zone in a non-subduction setting less typical of hadal ecological studies. The occurrence, depth ranges and maximum numbers of species between 5589 and 6405 m water depth are presented, along with an analysis of drivers of community composition. The dominant taxa of fish, Decapoda, and Amphipoda were mostly abyssal and cosmopolitan that are known to inhabit the upper depths of larger trenches elsewhere. Seafloor morphology itself is therefore unlikely to be a factor in controlling presence/absence or depth ranges in these species, nor was an effect of the complex and somewhat unique geomorphology of the Sui-shin Hole observed on the bait-attending faunal community. The presence of some hadal amphipod families suggests that these populations will emerge where the minimum depth they require is available, despite otherwise occupying very large depth ranges in other features. Contrastingly, snailfish (Liparidae) are entirely absent despite the availability of a compatible minimal depth, suggesting that this group requires a far deeper hadal feature with suitable inhabitable depth ranges for a population to emerge.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104183"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038076","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2025-12-31DOI: 10.1016/j.jmarsys.2025.104177
Daniel Ørnes Halvorsen , Ingrid Helene Ellingsen , Morten Omholt Alver
{"title":"Propagation of Ensemble Kalman Filter corrections into nested ocean model domains: A Norwegian coast case study","authors":"Daniel Ørnes Halvorsen , Ingrid Helene Ellingsen , Morten Omholt Alver","doi":"10.1016/j.jmarsys.2025.104177","DOIUrl":"10.1016/j.jmarsys.2025.104177","url":null,"abstract":"<div><div>As ocean observational systems expand their spatiotemporal coverage and models in ocean forecasting systems grow more complex and simulate at higher resolutions, the computational cost of assimilating observations using tools such as the Ensemble Kalman Filter increases, and at the finest model grid scales suitable observations are often too sparse or too coarse for direct assimilation. Consequently, investigating optimal strategies for data assimilation becomes imperative, particularly in nested ocean model setups. These setups present an opportunity to assimilate new observations primarily in the coarser ’mother’ domains provided that one can still capitalize on the benefits of observational data in nested domains through data propagation across boundary conditions. In this study, we assimilate sea surface temperature and salinity observations into a regional domain and examine their propagation to a nested local coastal domain, analyzing 12 distinct subdomains that capture various inflow and outflow regimes. Our findings reveal considerable spatiotemporal variability across these subdomains, with areas under the influence of strong inflows, notably along the Norwegian Coastal Current, benefiting the most from observational data assimilated in the mother domain. This study contributes to efforts to balance computational cost and forecast accuracy in ocean forecasting systems, setting the stage for further advancements in efficient and accurate ocean predictions.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104177"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939027","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2025-12-17DOI: 10.1016/j.jmarsys.2025.104173
Haruki Itozu , Eiji Masunaga
{"title":"Physical structures associated with wind-induced mixing in Tokyo Bay","authors":"Haruki Itozu , Eiji Masunaga","doi":"10.1016/j.jmarsys.2025.104173","DOIUrl":"10.1016/j.jmarsys.2025.104173","url":null,"abstract":"<div><div>Wind stress and river discharge are key drivers of mixing and estuarine circulation, which strongly affect dissolved oxygen (DO) dynamics. Despite extensive studies on water circulation and hypoxia in Tokyo Bay, detailed physical processes in Tokyo Bay are not well understood. This study assessed mixing in an enclosed coastal sea in the inner part of Tokyo Bay using observational records from five monitoring stations. Our results indicate that the horizontal Richardson number, calculated from wind stress and horizontal buoyancy gradients, effectively explains vertical mixing and stratification. The horizontal buoyancy gradient between the inner and middle parts of Tokyo Bay can be inferred from the winds along the channel except during coastal upwelling events. Furthermore, we found a robust relationship between hypoxia and high-density water in the bottom boundary layer, which was modulated by the mixing conditions in the bay. This study provides new insights into coastal mixing processes associated with buoyant river discharge in areas where wind forcing is dominant.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104173"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840537","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2025-12-06DOI: 10.1016/j.jmarsys.2025.104169
Sergey A. Mosharov , Alexander S. Mikaelyan , Alexandra V. Sergeeva , Vladimir I. Gagarin
{"title":"Long-term changes in the deep chlorophyll maximum and primary production in the deep-water basin of the Black Sea","authors":"Sergey A. Mosharov , Alexander S. Mikaelyan , Alexandra V. Sergeeva , Vladimir I. Gagarin","doi":"10.1016/j.jmarsys.2025.104169","DOIUrl":"10.1016/j.jmarsys.2025.104169","url":null,"abstract":"<div><div>Long-term changes in the deep chlorophyll maximum (DCM) and the depth-integrated primary production (PP) in the Black Sea deep basin from 1953 to 2021 were analysed. The changes were compared with alterations in water transparency, nitrate concentration in the deep maximum (NO<sub>3</sub>-max), its depth and the intensity of winter convection affecting the nutrient supply in the upper layer through the year. A regression between the light attenuation coefficient and the Secchi disk depth was constructed based on field data obtained over the past two decades. The regression differed from that constructed using data before 1989. Both regressions were used to reconstruct long-term changes in the euphotic zone depth. Over 68 years, in the stratified period from April to October, it varied from 21 to 43 m. The annual mean DCM depth ranged from 18 to 55 m and was, in most cases, confined to a depth of 1–2 % of the surface photosynthetically available radiation. The long-term dynamics of annual means of DCM and PP DCM and PP generally corresponded to the change in NO<sub>3</sub>-max. These variables were significantly correlated with NO<sub>3</sub>-max, supporting the hypothesis that NO<sub>3</sub>-max variations altered the nitrate gradient and, consequently, its upward flux into the photic zone, primarily consumed by DCM. At the same time, long-term changes in DCM and PP were also influenced by winter convection, affecting the nutrient supply in the upper layer and the macro-hydrodynamics of the Black Sea throughout the year. After a peak in eutrophication in the mid-1980s and a decline after the mid-1990s, NO<sub>3</sub>-max began to rise again in the last decade, indicating a new increase in eutrophication. The increasing trends in NO<sub>3</sub>-max and DCM and an increase in phytoplankton biomass, primarily due to diatoms, support this assumption.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104169"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797909","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}
Journal of Marine SystemsPub Date : 2026-01-01Epub Date: 2026-01-21DOI: 10.1016/j.jmarsys.2026.104181
Gladys Bernal , Daniel Rincón-Martínez , Camila Barragán , Gabriel Martínez , Julián Naranjo-Vesga , Angélica Carreño , Jael Pacheco-Mendoza , Alejandro Gutiérrez , Milena Benavides , Julia Gottschalk , Christian Winter
{"title":"Deep sediments and foraminifera assemblages in the Tayrona Basin, Southern Caribbean","authors":"Gladys Bernal , Daniel Rincón-Martínez , Camila Barragán , Gabriel Martínez , Julián Naranjo-Vesga , Angélica Carreño , Jael Pacheco-Mendoza , Alejandro Gutiérrez , Milena Benavides , Julia Gottschalk , Christian Winter","doi":"10.1016/j.jmarsys.2026.104181","DOIUrl":"10.1016/j.jmarsys.2026.104181","url":null,"abstract":"<div><div>This study investigates surface sediments from the seafloor of the Tayrona Basin, an understudied forearc basin in the Colombian Caribbean, offshore La Guajira. We analyzed grain size, mineralogical composition, major and minor elemental concentrations, organic carbon content, C/N ratios, and benthic foraminiferal (BF) assemblages to assess sedimentation processes and environmental conditions. Sediment and bottom-water samples were collected using a box corer and CTD during the Maria S. Merian MSM112 cruise in 2022. Multivariate statistical methods were applied to explore the relationships between environmental and ecological parameters. Despite the relative uniformity of bottom-water conditions, multivariate analyses of BF and sedimentological parameters revealed four distinct zones, each characterized by specific BF assemblages and sediment compositions. The Tayrona Basin exhibits signs of high surface productivity, yet, high oxygen levels in bottom waters promote active organic matter degradation, leading to lower total organic carbon (TOC) content in the sediments. Sedimentation is influenced by a combination of contour currents, terrigenous input from the Magdalena and Ranchería river systems, and autochthonous biogenic deposition. Benthic foraminiferal assemblages are dominated by agglutinated and epifaunal species, indicative of deep-marine environments influenced by bottom currents and organic matter flux. The study highlights the role of bottom-water oxygenation, terrigenous input, and deep-sea currents in shaping the sedimentary record of this forearc basin. This baseline dataset contributes to the understanding of sedimentary and ecological processes in deep-marine forearc settings.</div></div>","PeriodicalId":50150,"journal":{"name":"Journal of Marine Systems","volume":"253 ","pages":"Article 104181"},"PeriodicalIF":2.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038078","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}