Journal of Geophysical Research-Oceans最新文献

Seasonal Source Water Changes and Winds Contribute to the Development of Hypoxia in St Helena Bay Within the Southern Benguela Upwelling System

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-04-01 DOI: 10.1029/2024JC021702

A. J. Carlson, S. A. Siedlecki, J. Granger, J. Veitch, G. C. Pitcher, G. Fearon, F. Soares, M. Zhou, R. F. Flynn, S. E. Fawcett

{"title":"Seasonal Source Water Changes and Winds Contribute to the Development of Hypoxia in St Helena Bay Within the Southern Benguela Upwelling System","authors":"A. J. Carlson, S. A. Siedlecki, J. Granger, J. Veitch, G. C. Pitcher, G. Fearon, F. Soares, M. Zhou, R. F. Flynn, S. E. Fawcett","doi":"10.1029/2024JC021702","DOIUrl":"https://doi.org/10.1029/2024JC021702","url":null,"abstract":"St Helena Bay (SHB), a retentive zone in the productive southern Benguela Upwelling System off western South Africa, experiences seasonal hypoxia and episodic anoxic events that threaten local fisheries. To understand the drivers of oxygen variability in SHB, we queried 25 years of dissolved oxygen (DO) observations alongside high-resolution wind and hydrographic data, and dynamical data from a high-resolution model. At 70 m in SHB (mid-bay), upwelling-favorable winds in spring drove replenishment of cold, oxygenated water. Hypoxia developed in summer, becoming most severe in autumn. Bottom waters in autumn were replenished with warmer, less oxygenated water than in spring—suggesting a seasonal change in source waters upwelled into the bay. Downwelling and deep mixing in winter ventilated mid-bay bottom waters, which reverted to hypoxic conditions during wind relaxations and reversals. In the nearshore (20 m), hypoxia occurred specifically during periods of upwelling-favorable wind stress and was most severe in autumn. Using a statistical model, we extended basic hydrographic observations to nitrate and DO concentrations and developed metrics to identify the accumulation of excess nutrients on the shelf and nitrogen-loss to denitrification, both of which were most prominent in autumn. A correspondence of the biogeochemical properties of hypoxic waters at 20 m to those at 70 m implicates the latter as the source waters upwelled inshore in autumn. We conclude that wind-driven upwelling drives the replenishment of respired bottom waters in SHB with oxygenated waters, noting that less-oxygenated water is imported later in the upwelling season, which exacerbates hypoxia.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Does Wind-Driven Mixing Sustain Post-Bloom New Production in the Barents Sea?

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-31 DOI: 10.1029/2024JC021081

J. S. Braun, J. P. Rodgers, T. Brand, K. Davidson, S. F. Henley, M. Inall, M. Porter, E. J. Venables, F. Cottier

{"title":"Does Wind-Driven Mixing Sustain Post-Bloom New Production in the Barents Sea?","authors":"J. S. Braun, J. P. Rodgers, T. Brand, K. Davidson, S. F. Henley, M. Inall, M. Porter, E. J. Venables, F. Cottier","doi":"10.1029/2024JC021081","DOIUrl":"https://doi.org/10.1029/2024JC021081","url":null,"abstract":"Wind-driven mixing is one of the primary factors likely to regulate changes in primary production in the future Arctic Ocean with reduced sea ice coverage. Quantifying this effect requires an understanding of whether this mechanism will resupply nutrients to surface waters during the post-bloom season. We therefore investigated the role of wind-driven mixing events in initiating new production in the Barents Sea by combining measurements of turbulence, nitrate fluxes, and proportional uptake of nitrate during primary production. We calculated the resupply of nitrate, and the relationship between nitracline and wind-driven mixing depths was evaluated to investigate mechanisms for resupply of nitrate over the post-bloom summer. In the weakly stratified waters of the central Barents Sea, wind-driven resupply of nitrate to the surface was not found at the time of sampling. Nor was such resupply predicted based on empirical modeling of wind-driven mixing depth and the depth of the upper boundary of the nitracline for the post-bloom summer season. In the strongly stratified waters of the northern Barents Sea, new production was low at the time of sampling, but modeling suggests that wind-driven nitrate resupply is likely to occur during the post-bloom summer, differing from previous findings. The highest nitrate fluxes were found over the shelf slope north of Svalbard, which were 10 times higher than in the central Barents Sea, supporting 47% of the net primary productivity, accounted for as new production. Our model suggested that wind-driven nitrate resupply is to be expected for the shelf slope during the post-bloom season.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The Arctic Beaufort Gyre in CMIP6 Models: Present and Future

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-31 DOI: 10.1029/2024JC021873

Marylou Athanase, Raphael Köhler, Céline Heuzé, Xavier Lévine, Ryan Williams

{"title":"The Arctic Beaufort Gyre in CMIP6 Models: Present and Future","authors":"Marylou Athanase, Raphael Köhler, Céline Heuzé, Xavier Lévine, Ryan Williams","doi":"10.1029/2024JC021873","DOIUrl":"https://doi.org/10.1029/2024JC021873","url":null,"abstract":"The Beaufort Gyre (BG) is an important feature of the Arctic Ocean. By accumulating or releasing freshwater, it influences ocean properties both within the Arctic and as far as the North Atlantic. Yet, its future remains uncertain: the gyre could strengthen as sea ice declines and allows increased wind stress on the ocean, or weaken along with the Beaufort High (BH) pressure system. Here, we provide a first evaluation of the BG in historical and climate-change simulations from 27 available global climate models. We find that the vast majority of models overestimate the gyre area, strength, and northward extent. After discarding the models with too inaccurate a gyre and its drivers—namely, the sea ice cover and BH—we quantify changes in the BG under two emission scenarios: the intermediate SSP2-4.5 and the high-warming SSP5-8.5. By the end of the 21st century, most models simulate a significant decline or even disappearance of the BG, especially under SSP5–8.5. We show that this decline is mainly driven by a simulated future weakening of the BH, whose influence on the BG variations is enhanced by the transition to a thin-ice Arctic. The simulated gyre decline is associated with an expected decrease in freshwater storage, with reduced salinity contrasts between the gyre and both Arctic subsurface waters and freshwater outflow regions. While model biases and unresolved processes remain, such possible stratification changes could shift the Atlantic-Arctic meridional overturning circulation northward.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021873","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Mercury Distribution and Speciation Along the U.S. GEOTRACES GP15 Pacific Meridional Transect

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-29 DOI: 10.1029/2024JC021672

Lindsay D. Starr, Yipeng He, Robert P. Mason, Chad R. Hammerschmidt, Silvia E. Newell, Carl H. Lamborg

{"title":"Mercury Distribution and Speciation Along the U.S. GEOTRACES GP15 Pacific Meridional Transect","authors":"Lindsay D. Starr, Yipeng He, Robert P. Mason, Chad R. Hammerschmidt, Silvia E. Newell, Carl H. Lamborg","doi":"10.1029/2024JC021672","DOIUrl":"https://doi.org/10.1029/2024JC021672","url":null,"abstract":"Mercury (Hg) is a bioaccumulative neurotoxin that can concentrate to potentially harmful levels in higher levels of marine food webs following conversion to methylmercury (MeHg). This is of public health concern as seafood is a main protein source for many in the Pacific region. To better understand Hg partitioning and transformations in the Pacific Ocean, Hg species and phases were measured along a meridional section from Alaska to Tahiti in 2018. This allowed the description of Hg concentrations and speciation under a variety of biogeochemical conditions such as the Alaskan shelf, the oligotrophic North Pacific gyre, and near the hydrothermally active Loihi seamount. Filtered HgT concentrations were elevated below 1,000 m near the Loihi Seamount with an average concentration of 1.45 pM, possibly indicating enrichment from hydrothermal venting. Filtered MeHg concentrations were notably higher at depth at the equator and generally lower south of the equator. Total Hg in suspended particles was greatest in the upper 1,000 m near the Alaskan Shelf and decreased in concentration southward. Suspended particle MeHg was greatest in the surface ocean in the upper 300 m near the Intertropical Convergence Zone (ITCZ). For both HgT and MeHg, particle-associated concentrations appear to be related to organic fraction, and concentrations decreased southward. In general, all measured Hg species had greater concentrations in the northern than southern Pacific Ocean consistent with prior measurements.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143735509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Mesoscale Flow Impacts on Downward Energy Flux of Near-Inertial Waves in the Kuroshio Extension

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-28 DOI: 10.1029/2024JC022153

Joocheul Noh, Dong Guk Kim, SungHyun Nam, Seongbong Seo, Young-Gyu Park

{"title":"Mesoscale Flow Impacts on Downward Energy Flux of Near-Inertial Waves in the Kuroshio Extension","authors":"Joocheul Noh, Dong Guk Kim, SungHyun Nam, Seongbong Seo, Young-Gyu Park","doi":"10.1029/2024JC022153","DOIUrl":"https://doi.org/10.1029/2024JC022153","url":null,"abstract":"It is known that background mesoscale flows (BMFs) modify the local inertial frequency and affect the energy and vertical propagation speeds of near-inertial waves (NIWs), but their effects have not been quantified, especially using observations. This study aimed to quantify BMF effects on NIWs energy, group velocity, and the downward energy flux (Fz) of NIWs using 2 years of mooring data (November 2017–October 2019) from the Kuroshio Extension. By dividing the data into 11 days segments, the temporal variability of the effective near-inertial frequency and group velocity owing to the BMFs was considered. During winter, when NIWs are active—on a temporal average in anticyclonic flows—Fz increased by 50%, whereas in cyclonic flows, Fz decreased by 45% when the varying effective near-inertial frequency was considered. Because cyclonic circulations were twice as frequent, Fz decreased by ∼17%, to 0.37 × 10−3 W m−2. Even so, this amount is ∼1.8 times greater than that in the Northeastern Pacific and accounts for ∼28% of the wind work rate, similar to eddy-resolving high-resolution numerical model results. This high efficiency suggests that NIWs could play a more important role in deep mixing than previously considered. To overcome spatiotemporal limitations of Fz estimation from our data, long-term eddy statistics were used to estimate overall Fz over the Kuroshio Extension. Anticyclonic circulations lasted longer, leading to an ∼12% increase in Fz. Thus, the Kuroshio Extension is an important region for downward NIW energy propagation, and BMFs should be considered for accurate NIWs energetics.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC022153","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Quantifying the Potential Predictability of Arctic Marine Primary Production

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-27 DOI: 10.1029/2024JC021668

Courtney M. Payne, Nicole S. Lovenduski, Marika M. Holland, Kristen M. Krumhardt, Alice K. DuVivier

{"title":"Quantifying the Potential Predictability of Arctic Marine Primary Production","authors":"Courtney M. Payne, Nicole S. Lovenduski, Marika M. Holland, Kristen M. Krumhardt, Alice K. DuVivier","doi":"10.1029/2024JC021668","DOIUrl":"https://doi.org/10.1029/2024JC021668","url":null,"abstract":"Phytoplankton in the Arctic Ocean and sub-Arctic seas support a rich marine food web that sustains Indigenous communities as well as some of the world's largest fisheries. As sea ice retreat leads to further expansion of these fisheries, there is growing need for predictions of phytoplankton net primary production (NPP), which will likely allow better management of food resources in the region. Here, we use perfect model simulations of the Community Earth System Model version 2 (CESM2) to quantify short-term (month to 2 years) predictability of Arctic Ocean NPP. Our results indicate that NPP is potentially predictable during the most productive summer months for at least 2 years, largely due to the highly predictable Arctic shelves where fisheries in the Arctic are projected to expand. Sea surface temperatures, which are an important limitation on phytoplankton growth and also are predictable for multiple years, are the most important physical driver of this predictability. Finally, we find that the predictability of NPP in the 2030s is enhanced relative to the 2010s, indicating that the utility of these predictions may increase in the near future. This work indicates that operational forecasts using Earth system models may provide moderately skillful predictions of NPP in the Arctic, possibly aiding in the management of Arctic marine resources.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Contrasting the Marine Biogeochemical Cycles of Iron and Scandium in the California Current System

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-27 DOI: 10.1029/2024JC022087

Claire P. Till, Matthew P. Hurst, Robert B. Freiberger, Daniel C. Ohnemus, Benjamin S. Twining, Adrian Marchetti, Tyler H. Coale, Emily Pierce

{"title":"Contrasting the Marine Biogeochemical Cycles of Iron and Scandium in the California Current System","authors":"Claire P. Till, Matthew P. Hurst, Robert B. Freiberger, Daniel C. Ohnemus, Benjamin S. Twining, Adrian Marchetti, Tyler H. Coale, Emily Pierce","doi":"10.1029/2024JC022087","DOIUrl":"https://doi.org/10.1029/2024JC022087","url":null,"abstract":"The oceanic biogeochemical cycling of iron is globally important yet difficult to fully understand due to the many chemical processes involved. There is potential to use scandium, which has a similar ionic size and charge density to trivalent iron but lacks redox cycling, as a simpler analog for specific parts of the iron cycle, if we can sufficiently develop our understanding of scandium's reactivity. Here we move closer to this understanding. We look at particle reactivity and solubility through a 24-hr incubation experiment: 5 nmol/kg of dissolved scandium and/or iron were added to filtered and unfiltered California Current System water. Particulate scandium formed only in the unfiltered treatments, at a quantity unlikely to have been taken up biologically. This is the first direct observation of scavenging of scandium, an attribute shared with iron. Our results also serve as the first test of scandium solubility in seawater: 1.9 nmol/kg of dissolved scandium was stable in the filtered treatment, 50 times more than the highest natural concentrations so far observed. This indicates that, in contrast to iron, scandium's oceanic cycling is unlikely to be influenced by solubility limits. We also compare particulate depth profiles: labile particulate iron was disproportionally higher than that of scandium in shelf-influenced samples, likely due to iron reductively dissolving in the sediments, which scandium cannot do, and then precipitating in oxic seawater. Due to this combination of behaviors, our results suggest that paired observations of scandium and iron may help distinguish between iron sourced from sediment resuspension and reductive dissolution.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Impact of Synoptic-Scale Atmospheric Forcing Conditions on Deep Convection in the Labrador Sea

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-27 DOI: 10.1029/2024JC021818

R. Piunno, G. W. K. Moore, K. Våge

{"title":"Impact of Synoptic-Scale Atmospheric Forcing Conditions on Deep Convection in the Labrador Sea","authors":"R. Piunno, G. W. K. Moore, K. Våge","doi":"10.1029/2024JC021818","DOIUrl":"https://doi.org/10.1029/2024JC021818","url":null,"abstract":"During the winter season, stratification in the central Labrador Sea is eroded by surface heat fluxes causing convective overturning exceeding depths of 2 km. This is one of the few locations globally in which deep convection occurs, making it an important feature of the climate system and ocean ventilation. Large-scale atmospheric circulation patterns modulate the air-sea interaction that drives the loss of ocean buoyancy. Here, we investigate the process by which weather patterns driven by the North Atlantic Oscillation (NAO), and its northern center of action, the Icelandic Low, modulate convective depths. A one-dimensional ocean model is used to quantify the mixed layer depth's response to various atmospheric forcing conditions. We find that while net heat flux is the strongest modulating factor of mixed layer depth's seasonal maximum, it is also strongly affected by the NAO. The Icelandic Low, despite its proximity to the Labrador Sea, does not affect mixed layer deepening as strongly. From geospatial correlation fields with heat flux, NAO, and Icelandic Low time series, it is evident that the NAO more efficiently regulates strong, cold, westerly winds from over the North American continent, which are more effective at cooling the ocean surface boundary layer. Understanding these dynamics is crucial for predicting future changes in ocean ventilation and its impact on global climate patterns.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021818","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The Life Cycle of the Low Salinity Lenses at the Surface of the Arctic Ocean

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-27 DOI: 10.1029/2024JC021699

Clément Van Straaten, Camille Lique, Nicolas Kolodziejcyk

{"title":"The Life Cycle of the Low Salinity Lenses at the Surface of the Arctic Ocean","authors":"Clément Van Straaten, Camille Lique, Nicolas Kolodziejcyk","doi":"10.1029/2024JC021699","DOIUrl":"https://doi.org/10.1029/2024JC021699","url":null,"abstract":"In the Arctic Ocean, coherent low salinity anomalies, known as lenses, are often observed at the surface and are thought to result from the input of large amounts of freshwater from sea ice melting and river runoff. In this study, we perform a systematic detection of these lenses and track their displacements in a 21-year simulation performed with a high resolution ocean-sea ice regional model of the Arctic in order to gain a better understanding of their life cycle. Two thirds of the lenses are formed during summer, in response to sea ice melt, river discharge, or are colocated with mesoscale eddies. They are then able to persist for weeks to months, traveling long distance across the basin as their characteristic surface salinity anomalies get eroded through vertical processes. Throughout their life, the lenses are associated with larger sea ice melting flux during summer and concentrate stronger sea ice formation than their surroundings by up to 50%. Over the 21-year period, the number of lenses has increased by <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>∼</mo>\u0000 </mrow>\u0000 <annotation> ${sim} $</annotation>\u0000 </semantics></math>2%/year over the Arctic Ocean, and the formation locations have shifted following the retreat of the sea ice edge in regions such as Greenland, Barents, and Chukchi seas. Our results suggest that these localized, intermittent and coherent lenses may be important for the large scale Arctic dynamics and the ocean-sea ice interaction.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021699","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Estimation of Roughness Height on Oyster Reefs

IF 3.3 2区地球科学

Journal of Geophysical Research-Oceans Pub Date : 2025-03-26 DOI: 10.1029/2024JC021888

M. Lee, Y. S. Park, H. Noh, B. Kim, S. J. Baek

{"title":"Estimation of Roughness Height on Oyster Reefs","authors":"M. Lee, Y. S. Park, H. Noh, B. Kim, S. J. Baek","doi":"10.1029/2024JC021888","DOIUrl":"https://doi.org/10.1029/2024JC021888","url":null,"abstract":"Oyster reefs play a crucial role in coastal protection by attenuating waves and currents, thereby contributing to coastal stability. This protective function is largely due to the significantly greater roughness height of oyster reefs than bare sand surfaces. There is limited understanding of the characteristic length and the appropriate estimation equation needed to determine the roughness height of oyster reefs. To address this, experiments were conducted under both unidirectional and oscillatory flow conditions to explore the relationship between the geometry of oyster reefs and their roughness height. The experimental results indicate a correlation between the hydraulic roughness height and the height of their surface rough elements. Furthermore, the study proposes a unified roughness height formula that is applicable to both unidirectional and oscillatory flows. The validity of this formula is assessed through its application to the log law and comparison with experimental data. The findings of this study facilitate the estimation of the roughness height of oyster reefs, which is essential for understanding their hydraulic characteristics and their role in coastal protection.","PeriodicalId":54340,"journal":{"name":"Journal of Geophysical Research-Oceans","volume":"130 4","pages":""},"PeriodicalIF":3.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JC021888","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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