Continental Shelf Research最新文献

{"title":"Simulation and Lagrangian analysis of coastal upwelling in the northwestern East/Japan sea","authors":"P.A. Fayman,&nbsp;I.S. Solonets,&nbsp;S.V. Prants,&nbsp;M.V. Budyansky,&nbsp;A.A. Didov","doi":"10.1016/j.csr.2025.105535","DOIUrl":"10.1016/j.csr.2025.105535","url":null,"abstract":"<div><div>The autumn monsoon coastal upwelling in the northwestern East/Japan Sea (EJS) was studied using five upwelling indices, 3D tracking of Lagrangian particles, finite-time Lyapunov exponents, and satellite data on sea surface temperature (SST) and chlorophyll-a concentration. The coastal upwelling, which had not yet been quantitatively simulated and studied in the area, begins at the end of September when northwesterly and westerly winds dominate. The simulations were conducted using the Regional Ocean Model System (ROMS) with a high horizontal resolution of 600 m. The upwelling intensity has been estimated by calculating SST difference between the coastal and offshore zones, the Ekman transport and pumping indices, sea surface height and speed of offshore surface currents. A strong upwelling event in the fall of 2017 was identified through calculations of the thermal upwelling index and other indices over the extended period from 1999 to 2019, based on model results and satellite observations. The intermittency of active and break phases during the 2017 upwelling event correlated with variations in wind direction and surface wind stress curl in the study area. The upwelling of cold bottom water to the surface was directly simulated via 3D Lagrangian particle tracking in the model velocity field. Deep-water upwelling is a dynamic process, with the distribution of upwelled particles reaching the surface layer correlating with the wind-induced upwelling index near the coastal area bounded by the 60 m isobath. Another key result of this study is the identification of transport barriers separating surface waters with different temperatures. These barriers were identified by maxima in the finite-time Lyapunov exponent, which provided insights into upwelling thermal fronts and associated transport patterns. The simulation results agreed with satellite-derived SST and chlorophyll-a data from the fall of 2017, as well as with satellite and <em>in situ</em> observations of coastal upwelling in the study area from other years.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"294 ","pages":"Article 105535"},"PeriodicalIF":2.2,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851867","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}

{"title":"Analysis of turbulence characteristics in a nearshore area beyond the surf zone of a mesotidal bay","authors":"Victor A. Arias-Esquivel,&nbsp;Victor M. Godínez,&nbsp;Markus Gross,&nbsp;Anahí Bermúdez-Romero,&nbsp;Vanesa Magar","doi":"10.1016/j.csr.2025.105530","DOIUrl":"10.1016/j.csr.2025.105530","url":null,"abstract":"<div><div>Turbulence impacts renewable energy converters’ performance due to differences in turbulent kinetic energy (TKE) production and TKE dissipation in estuarine, coastal, and shelf regions. However, the turbulence structure under different environmental forcings is not well understood. This study uses waves, tides, and wind data to analyse the mean flow field and turbulence characteristics in Todos Santos Bay (TSB), a mesotidal bay in the northern Mexican Pacific. The main results are based on a month-long time series obtained with a Sentinel V50, a five-beam Acoustic Doppler Current Profiler (ADCP), installed in a location within the bay where currents are less than 0.55 m s⁻¹. A tidal decomposition analysis of sea level and current data confirmed mixed and predominantly semi-diurnal tides. Waves and wind stresses affect the flow in the layers near the sea surface. We computed the Reynolds stresses, TKE, anisotropy, TKE production and TKE dissipation to characterize the turbulence properties. The zonal vertical Reynolds stress increases from the bottom upwards, while the meridional vertical Reynolds stress decreases from the bottom upwards. The turbulent kinetic energy increases from the bottom upwards. The waves do not significantly affect the Reynolds stresses, the TKE, or the anisotropy ratio when the significant wave height is less than 0.7 m. It is worth highlighting that strong wave conditions have an important effect on the turbulence characteristics of the site, even during spring tides. In addition, turbulent processes change with time following flood and ebb tides in the bay, and the TKE and the zonal vertical Reynolds stress are higher during neap tides than during spring tides. Finally, TKE budget computations showed that TKE dissipation dominates over TKE production, implying the existence of non-local transport to the TKE budget at the site; these turbulence metrics are enhanced during neap tides.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"294 ","pages":"Article 105530"},"PeriodicalIF":2.2,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828908","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}

{"title":"The role of barrier reef protection to storm surge during tropical cyclones in a narrow lagoon, New Caledonia, south west Pacific","authors":"Maxime Duphil ,&nbsp;Jérôme Lefèvre ,&nbsp;Swen Jullien ,&nbsp;Jean Roger ,&nbsp;Pascal Dumas ,&nbsp;Romain Le Gendre ,&nbsp;Jérôme Aucan ,&nbsp;Myriam Vendé-Leclerc ,&nbsp;Martin Bénébig ,&nbsp;Christophe Menkes","doi":"10.1016/j.csr.2025.105540","DOIUrl":"10.1016/j.csr.2025.105540","url":null,"abstract":"<div><div>Pacific islands are exposed to coastal hazards, particularly storm surges resulting from low pressure, extreme winds, and waves. While coral reefs naturally protect shorelines from incident waves, the diversity of reef geomorphologies induce various coastal responses, complicating hazard prediction based on offshore conditions. Understanding lagoon storm surge dynamics is therefore crucial for developing adaptation strategies to address global warming and sea-level rise. This study investigates the storm surge response of the narrow and shallow lagoon of Poe in New Caledonia using the SCHISM-SWAN coupled circulation-wave numerical model under tropical cyclone conditions. A retrospective of the 2019 cyclonic season shows that maximum storm surge is concentrated in the narrowest part of the lagoon, where human infrastructures are located, increasing exposure to extreme water levels. Modifying the reef structure to a more irregular form reveals that macro-scale reef features can mitigate wave setup intensity. Additionally, water depth variations over the reef crest significantly affect wave setup, with up to 30 % difference between high and low tides. A broader generalization based on 258 synthetic cyclone tracks highlights that within the lagoon, wave setup accounts for approximately 70 % of the storm surge, rising to 90 % during the most extreme event. These results showing that the wave contribution is essential for accurate storm surge prediction. The findings provide critical insights for improving coastal hazard assessment, land use planning, and resilience strategies in reef island environments facing climate change.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"294 ","pages":"Article 105540"},"PeriodicalIF":2.2,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828860","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}

{"title":"Monitoring of marine pollution and stress responses: Radionuclides concentration and antioxidant molecules in macroalgae and seagrass","authors":"Nurdan Akakçe ,&nbsp;Aysun Uğur Görgün ,&nbsp;İnci Tüney ,&nbsp;Berkay Camgöz ,&nbsp;İlker Sert","doi":"10.1016/j.csr.2025.105538","DOIUrl":"10.1016/j.csr.2025.105538","url":null,"abstract":"<div><div>The biological effects of marine radionuclides on the macroalgae <em>Cystoseira crinita</em> and <em>Halopteris scoparia</em>, as well as the seagrass <em>Cymodocea nodosa</em>, were investigated in İzmir Bay. Concentrations of radionuclides ²¹⁰Pb, ²²⁶Ra, ²³²Th, and ⁴⁰K were measured in samples of <em>C. crinita</em> and <em>H. scoparia</em>, whereas only ²¹⁰Pb and ⁴⁰K concentrations were determined in <em>C. nodosa</em>. In this study, ²¹⁰Pb concentrations ranged from 11.38 to 31.72 Bq/kg in <em>C. crinita</em>, 19.7–98.02 Bq/kg in <em>H. scoparia</em>, and 26.09–81.27 Bq/kg in <em>C. nodosa</em>. Elevated ²¹⁰Pb levels in <em>H. scoparia</em> and <em>C. nodosa</em> were observed predominantly during autumn and winter. The ²¹⁰Po/²¹⁰Pb activity ratios were found to range between 1.45 and 2.25 in <em>C. crinita</em>, 0.15–1.30 in <em>H. scoparia</em>, and 0.70–1.47 in <em>C. nodosa</em>. The antioxidant defense mechanisms in response to radiation-induced stress were examined in both macroalgae and seagrass samples, focusing on key biomarkers such as ascorbate peroxidase (APX), catalase (CAT), and proline. Correlation analyses were conducted between radionuclide concentrations and antioxidant activity. <em>C. crinita</em> exhibited a defense response to ²¹⁰Pb exposure similar to that of ²¹⁰Po, primarily through increased CAT enzyme activity. In <em>C. nodosa</em>, elevated ⁴⁰K levels were associated with enhanced proline and APX responses, while the accumulation of ²¹⁰Pb was met with a significant increase in proline-mediated antioxidant defense.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105538"},"PeriodicalIF":2.2,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780033","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}

{"title":"Spatial variations and controlling factors in phytoplankton composition at deep chlorophyll maxima in the Bay of Bengal","authors":"V.V.S.S. Sarma ,&nbsp;P. Paul ,&nbsp;J.S. Patil","doi":"10.1016/j.csr.2025.105539","DOIUrl":"10.1016/j.csr.2025.105539","url":null,"abstract":"<div><div>The occurrence of deep chlorophyll maxima (DCM) in the stratified oceanic regions is reported either due to photoacclimation or the availability of nutrients. The influence of mesoscale processes, such as eddies, on the depth of DCM, phytoplankton composition, and the fate of phytoplankton pigments in the Bay of Bengal is unclear. Based on the <em>in-situ</em> observations in the water column, the role of eddies on spatial variability in the depth of DCM and phytoplankton composition was studied. The depth of DCM varied between 20 and 80 m. It was shallowed and deepened in the cyclonic (CE) and anticyclonic (ACE) eddy regions by 20–40 m due to convergence and divergence, respectively. The depth of DCM displayed a significant linear relationship with nutricline and an inverse relationship with the percentage of surface photosynthetic active radiation (PAR) reaching the depth of DCM. The chlorophyll-a (Chl-a) concentration in the DCM varied between 0.2 and 1.1 mg m⁻³ and was inversely related to the PAR reached and nutrient concentrations at this depth. Prymnesiophytes, chlorophytes, cyanobacteria and prochlorophytes significantly contributed to the phytoplankton in the DCM, but their contribution varied with the amount of PAR received and nutrient concentrations at the DCM. The biomass of prymnesiophytes and chlorophytes increased with an increase in PAR and nutrients at DCM and contrasted with that observed for cyanobacteria and prochlorophytes. The dominance of prymnesiophytes and chlorophytes was observed in regions where shallow (&lt;40m) DCM was present. Cyanobacteria and prochlorophytes were abundant in areas with deep DCM, due to variable light adaptations. Some physical processes bring phytoplankton in the DCM to the surface, and to examine its fate, a microcosm experiment was conducted by incubating DCM waters under surface light. The microcosm experiments suggested that premnesiophytes and chlorophytes decreased by 85–90 %, whereas a 65 % decrease was noticed in the case of cyanobacteria and prochlorophytes from that of the initial. This suggests an increase in Chl-a, after intense physical mixing, may be due to new production arising from nutrients upwelling. The numerical models simulate the depth of DCM, but the composition of phytoplankton groups can be simulated using the governing factors derived in this study to evaluate their role in primary and export production and carbon sequestration in the stratified ocean.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"294 ","pages":"Article 105539"},"PeriodicalIF":2.2,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828861","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}

{"title":"Nitrogen cycling and ecological impacts mediated by water mass interactions in the Yangtze river estuary and the adjacent east China Sea: insights from nitrogen and oxygen isotopes","authors":"Ziying Zhou ,&nbsp;Zhi Yang ,&nbsp;Bin Wang ,&nbsp;Haiyan Jin ,&nbsp;Lihua Ran ,&nbsp;Zhibing Jiang ,&nbsp;Qianna Chen ,&nbsp;Feng Zhou ,&nbsp;Hao Zheng ,&nbsp;Jianfang Chen","doi":"10.1016/j.csr.2025.105534","DOIUrl":"10.1016/j.csr.2025.105534","url":null,"abstract":"<div><div>The complex hydrodynamic conditions in the Yangtze River Estuary play a pivotal role in shaping the distribution, transport, and transformation of nutrients, thereby influencing phytoplankton growth and ecosystem stability in the region. This study, based on hydrographic, biological, and chemical data collected during a mid-August 2023 cruise survey in the Yangtze River Estuary and the adjacent East China Sea, integrates nitrate nitrogen (δ¹⁵N_NO3) and oxygen isotope (δ¹⁸O_NO3) tracing techniques to investigate the synergistic effects of physical-biogeochemical processes during water mass convergence. The findings reveal that high concentrations of terrestrial nitrate, transported by the Changjiang Diluted Water (CDW), serve as the primary inorganic nitrogen source, driving rapid phytoplankton growth. Meanwhile, the Yellow Sea Coastal Current (YSCC) and Taiwan Warm Current (TWC) regulate nutrient transport and redistribution through mixing and convergence processes. The high phosphate input from the TWC optimizes the regional nutrient structure, alleviating phosphorus limitation caused by excessive nitrogen input from the CDW. However, the intrusion of low-oxygen YSCC waters may worsen bottom-water hypoxia. The frontal systems and water column stratification, induced by the convergence of CDW, YSCC, and TWC, control the spatial distribution of nitrogen and phosphorus nutrients, shape phytoplankton distribution patterns, and foster the formation of localized high-productivity zones. The synergistic effects of physical and biogeochemical processes, driven by water mass interactions, can significantly reduce bottom-water dissolved oxygen concentrations, thereby increasing the risk of localized hypoxia and threatening regional ecosystem stability.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105534"},"PeriodicalIF":2.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757596","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}

{"title":"Human trampling and vehicle traffic affect meiofauna and Nematoda distribution patterns in Amazonian macrotidal sandy beaches","authors":"Thuareag Monteiro Trindade dos Santos ,&nbsp;Marcelo Petracco ,&nbsp;Virág Venekey","doi":"10.1016/j.csr.2025.105533","DOIUrl":"10.1016/j.csr.2025.105533","url":null,"abstract":"<div><div>Recreational activities are important source of disturbance on sandy beaches and have a negative effect on meiofauna communities as they alter species abundance, diversity, and/or distribution. Here, we report for the first time the effects of recreational activities on the distribution patterns of meiofauna communities and Nematoda assemblages of Amazonian sandy beaches. Sampling was performed during four consecutive months with different beach use intensity in 2017 (June – before vacation, July – vacation month, August and September - after vacation months) on two contrasting beaches regarding disturbance (Urban: Atalaia; and Protected: Corvinas). Physical sediment variables remained constant over time in both beaches, whereas differences were found in sediment compaction over the periods. Sediment compaction was considered the most important factor for the differences observed in meiofauna community and Nematoda assemblage structures in the beaches, and it was related to intensity of recreational activities. Overall, variations in density and changes in richness between periods and sampling stations were observed in Atalaia beach. Before the vacation three faunal zones were distinguished in Atalaia beach (upper intertidal, intermediate intertidal, and low-intertidal), whereas in the vacation period only two faunal zones were distinguished (upper-intertidal and intermediate-low intertidal). On the other hand, Corvinas beach remained the same throughout the study. Thus, the initial hypothesis that recreational activities trigger changes in the structure and composition of meiofauna and Nematoda, reducing richness and abundance of the community, was confirmed. Furthermore, the vulnerability of some taxa studied here, particularly Copepoda and Tardigrada, and the Nematoda genera <em>Chromadorita</em> and <em>Daptonema</em> indicates that they might be potential indicators of recreational activities.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105533"},"PeriodicalIF":2.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721025","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}

{"title":"Environmental DNA (eDNA) detection reveals strong connectivity and similar co-occurrence patterns of planktonic and benthic eukaryote communities in Dinghai bay","authors":"Qiushi Chen ,&nbsp;Qianqian Liu ,&nbsp;Peng Xiao ,&nbsp;Yifan Ma ,&nbsp;Zhongzhou Lin ,&nbsp;Zhuoyi Zhu ,&nbsp;Lianming Zheng ,&nbsp;Wenjing Zhang","doi":"10.1016/j.csr.2025.105525","DOIUrl":"10.1016/j.csr.2025.105525","url":null,"abstract":"<div><div>Exploring the relationship between planktonic and benthic eukaryotes in coastal zones is of great significance for us to further understand the influence of environmental conditions on microbial ecosystems and the integrated management of biological resources and ecological landscape in coastal areas. In this study, environmental DNA (eDNA), co-occurrence network analysis and the SourceTracker analysis were used to analyze seawater and sediment samples from Dinghai Bay, Fujian Province. Community structure, diversity, and co-occurrence patterns of eukaryotes, especially microeukaryotes in different habitats were compared. The results showed that: (1) There are differences between planktonic and benthic eukaryote communities to some extent. The diversity of benthic eukaryotes is significantly higher than that of planktonic eukaryotes. Environmental factors such as transparency, TDS (total dissolved solids) and salinity are significantly correlated with planktonic eukaryotes, while benthic eukaryotes are only correlated with conductivity. In addition, the planktonic community shows a strong distance-decay pattern while the benthic community did not. (2) There is strong connectivity between planktonic and benthic eukaryotes. The proportion of shared zero-radius operational taxonomic units (ZOTUs) in planktonic and benthic eukaryotes was 96.70% and 77.65%, respectively, and more than 92% of shared ZOTUs were not significantly different between two habitats. In addition, SourceTracker analysis showed that 59.70% of the benthos came from the planktonic community and 91.22% of the plankton from the benthic community. Plankton such as copepod, diatoms, dinoflagellata and ciliates live in sediments at some life stages,and there is often a planktonic larval stage in the life cycle of benthos. On the other hand, our study area is located in the intertidal zone and subtidal zone with special environmental conditions, which is influenced by tides, winds and river freshwater, and the constant mixing of surface and bottom water is also a possible reason. (3) The co-occurrence network analysis shows that the co-occurrence patterns of eukaryotes in the two habitats are similar to a considerable degree. Positive correlations are dominant in both planktonic and benthic communities, and the ratio of positive and negative correlations has no significant difference between two communities.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105525"},"PeriodicalIF":2.1,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686949","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}

{"title":"Effects of wave-current interaction on water exchange in the Bohai Sea","authors":"Sheng Wang ,&nbsp;Xueen Chen ,&nbsp;He Jiang ,&nbsp;Peng Zheng","doi":"10.1016/j.csr.2025.105531","DOIUrl":"10.1016/j.csr.2025.105531","url":null,"abstract":"<div><div>The Bohai Sea is a typical continental shelf region, and its water exchange capacity has long been the focus of research. Wave-current interaction (WCI), as an important physical process for the continental shelf hydrodynamics, is worthy of further investigation due to its impact on water exchange in the Bohai Sea. In this study, based on the FVCOM-UnSWAN wave-current coupling model, the water exchange characteristics of the Bohai Sea under the influence of WCI were discussed using the conservative material tracer method. The effects of WCI on water exchange and hydrodynamics were further analyzed under both seasonal variations and extreme weather events. As the only channel connecting the Yellow Sea and the Bohai Sea, changes in the water exchange capacity of the Bohai Strait can reflect the change of the Bohai Sea. Focusing on this region, our results show that WCI modulates water exchange rates: enhancing exchange by approximately 1.3 % in winter, while exhibiting complex behavior in summer, initially suppressing and subsequently enhancing water exchange. During storm surge events, WCI plays a crucial role in modifying hydrodynamic conditions, increasing water elevation by 20 %–35 %, with changes in water velocity up to an order of magnitude larger compared to seasonal scales. During the water exchange process, WCI modifies the current velocity structure by introducing a non-conservative force <em>F</em>_<em>w</em>, among which the white-capping dissipation term plays a dominant role.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105531"},"PeriodicalIF":2.1,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679260","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}

{"title":"Spatial-temporal reliability of satellite-derived temperature and thermal stress in the abrolhos bank, Brazil","authors":"Renato D. Ghisolfi ,&nbsp;Natiely Monteiro ,&nbsp;Guilherme N. Mill ,&nbsp;Ruy K.P. Kikuchi ,&nbsp;Rodrigo L. Moura","doi":"10.1016/j.csr.2025.105529","DOIUrl":"10.1016/j.csr.2025.105529","url":null,"abstract":"<div><div>Accurate estimates of ocean temperatures are needed to assess the consequences and improve predictions of thermal stress over coral reefs, which are declining globally due to mass coral bleaching and mortality episodes caused by maritime heatwaves. Here, we contrasted satellite-derived sea surface temperatures (SSTs) recovered from NOAA Coral Reef Watch (CoralTemp) with in situ temperatures measured between 2012 and 2018 in nine locations within the Southwestern Atlantic's largest coral reefs (Abrolhos Bank, Brazil), at different depths. Our results revealed a strong correlation (over 0.95) between the two datasets for measurements carried out to 10 m depths or within the mixed layer. In the dry period (April to September), when the water column is homogenous and the net heat flux through the air-sea interface is negative, temperature data collected below the mixing layer or at the bottom were consistent with CoralTemp. However, in situ measurements were much lower (up to 4 °C at some sites) during the rainy period (from October to March) due to cold water occurrence in the bottom half of the water column. During the Third Global Bleaching Event (2016–2017) bleaching levels in shallow reefs were more intense than the thermal stress estimated by CoralTemp. Still, they were lower in the deeper reefs that remained with lower in situ temperatures throughout the summer and autumn. While we confirm that CoralTemp data provide a reliable source of sea surface temperatures (SSTs), caution is advised when inferring thermal stress at greater depths, particularly in mesophotic sites deeper than 20 m.</div></div>","PeriodicalId":50618,"journal":{"name":"Continental Shelf Research","volume":"293 ","pages":"Article 105529"},"PeriodicalIF":2.1,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695470","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}