Ocean Modelling最新文献_第3页

Evaluation of a 3D unstructured grid model for the New York-New Jersey Harbor under different forcing sources 不同强迫源下纽约-新泽西港三维非结构网格模型评价

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-17 DOI: 10.1016/j.ocemod.2025.102598

Kyungmin Park , Y. Joseph Zhang , Emanuele Di Lorenzo , Gregory Seroka , Ayumi Fujisaki-Manome , Shachak Pe'eri , Saeed Moghimi , John G.W. Kelley

{"title":"Evaluation of a 3D unstructured grid model for the New York-New Jersey Harbor under different forcing sources","authors":"Kyungmin Park , Y. Joseph Zhang , Emanuele Di Lorenzo , Gregory Seroka , Ayumi Fujisaki-Manome , Shachak Pe'eri , Saeed Moghimi , John G.W. Kelley","doi":"10.1016/j.ocemod.2025.102598","DOIUrl":"10.1016/j.ocemod.2025.102598","url":null,"abstract":"<div><div>This paper presents an in-depth evaluation of a 3D unstructured grid model under various forcing sources, with a focus on the New York-New Jersey (NY-NJ) harbor. The model is first calibrated and evaluated through control runs, ensuring it accurately captures essential processes around the NY/NJ harbor. The sensitivity experiments highlight the significant roles and contributions of different forcing sources in coastal ocean conditions such as total water level, currents, salinity, and water temperature. Different tidal forcings, including FES2014, TPXO9 v1, and TPXO9 v5, show significant effects on tidal components, total water levels, currents, and water temperature, with minimal impact on salinity. Surface forcings from the HRRR, ERA5, and GFS demonstrate variable influences on water temperature predictions, while total water level, currents, and salinity are less sensitive to the different atmospheric forcing sources. Different open ocean conditions from CMEMS, HYCOM, and GRTOFS exhibited minor impacts on hydrodynamic variables in the inland rivers and estuaries but noticeably affected ocean surface currents and vertical structures of water temperature on the continental shelf. Different river discharges from USGS and NWM show high sensitivities of salinities and upstream water levels while shelf-scale ocean currents and vertical structures of water temperatures are similar across the different river discharges. The findings emphasize the necessity of selecting optimal forcing sources to minimize uncertainties and enhance predictive capabilities, supporting better decision-making in coastal management and hazard mitigation.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102598"},"PeriodicalIF":3.1,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703498","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

Revisiting tidal rectification by bottom topography 从底部地形再看潮汐整流

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-15 DOI: 10.1016/j.ocemod.2025.102587

Logueminda Sabaga , Yves Morel , Nadia Ayoub , Patrick Marsaleix , Hoavo Hova , Alexis Chaigneau

{"title":"Revisiting tidal rectification by bottom topography","authors":"Logueminda Sabaga , Yves Morel , Nadia Ayoub , Patrick Marsaleix , Hoavo Hova , Alexis Chaigneau","doi":"10.1016/j.ocemod.2025.102587","DOIUrl":"10.1016/j.ocemod.2025.102587","url":null,"abstract":"<div><div>Tidal rectification plays a key role in controlling mean transport in coastal areas and coast-basin material exchange. To calculate mean flows, conventional approaches require high-resolution basin-scale numerical simulations which demands substantial computational resources. This study revisits tidal rectification governed by topographic variation and bottom friction, and proposes a new analytical solution.</div><div>The first step is to derive solutions in the simplest possible configuration. We thus revisit solutions in one-dimensional (1D) configurations, using a Lagrangian approach from which Eulerian results are derived. Exact solutions are provided for the frictionless case and new approximate solutions are developed for a more realistic quadratic bottom friction.</div><div>We then analyze the influence of viscosity on solutions from numerical models. We find that the latter has moderate influence when quadratic bottom friction is considered. However, when the steady rectified current extends over regions deeper than a critical depth, viscosity can lead to spurious effects and alter the accuracy of the numerical results. We show the critical depth can be expressed as a function of friction coefficient, tidal flux and topography variation length-scale.</div><div>We finally extend the analytical solutions derived for the 1D case to the two-dimensional (2D) case. The 2D solutions are compared to results from an ocean general circulation model solving the full barotropic equations in an academic configuration with a complex topography and a quadratic bottom friction. Comparison between analytical solutions and numerical simulations shows good agreement for both the magnitude and direction of the steady rectified tidal current. Sensitivity tests to bottom friction and tide amplitude show that the steady rectified current is parallel to the isobaths and independent of the magnitude of the bottom friction coefficient at first order.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102587"},"PeriodicalIF":3.1,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672651","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

Characteristics and trends of ocean turbulent mixing models research in 1990–2023 based on bibliometric analysis 基于文献计量分析的1990-2023年海洋湍流混合模式研究特征与趋势

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-14 DOI: 10.1016/j.ocemod.2025.102595

Yanhong Wei , Jinping Wang

{"title":"Characteristics and trends of ocean turbulent mixing models research in 1990–2023 based on bibliometric analysis","authors":"Yanhong Wei , Jinping Wang","doi":"10.1016/j.ocemod.2025.102595","DOIUrl":"10.1016/j.ocemod.2025.102595","url":null,"abstract":"<div><div>Ocean turbulent mixing models (OTMMs) have become a popular research topic in recent years, and numerous related research papers have been published. Here, a bibliometric method was utilized to analyze 8411 papers from the Web of Science published from 1990 to 2023 and provide a comprehensive overview based on metrics, including the total publications, countries, institutions, journals, authors, keywords, and subject categories. The results revealed the following. (1) The number of published papers increased gradually, with the USA and China being the main research countries. However, citations per paper in China only accounted for 17.6 %, indicating that there is considerable room for improvement. Seven institutions with a citation per paper rate exceeding 50 % were from the USA, indicating its absolute authority and influence in this field. (2) <em>Astrophysical Journal, Astronomy & Astrophysics</em>, and <em>Geophysical Research Letters</em> were the core journals; <em>Qiao Fangli, Xue Ming</em>, and <em>Madec Gurvan</em> were the most representative authors; M<em>odel, turbulence</em>, and <em>circulation</em> were the most frequent keywords; and <em>Oceanography, Meteorology Atmospheric Sciences</em>, and <em>Environmental Sciences</em> were the most important subject categories over the past 30 years. (3) OTMMs have evolved from simplified models to ultra-high degree-of-freedom numerical models with a faster operation speed, higher spatiotemporal resolution and more complete physical processes. Therefore, decreasing the bias of OTMMs in simulating the upper ocean is an international scientific frontier and long-term technical challenge for ocean and climate prediction. This is the first comprehensive visualization and analysis of this research hotspot and its trends.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102595"},"PeriodicalIF":3.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655420","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

Radiation condition enforcement in linear free-surface wave modeling 线性自由表面波模型中辐射条件的增强

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-12 DOI: 10.1016/j.ocemod.2025.102594

Junhui Liu, Scott F. Bradford, Douglas A. Schwer, Ralph L. Fiedler

{"title":"Radiation condition enforcement in linear free-surface wave modeling","authors":"Junhui Liu, Scott F. Bradford, Douglas A. Schwer, Ralph L. Fiedler","doi":"10.1016/j.ocemod.2025.102594","DOIUrl":"10.1016/j.ocemod.2025.102594","url":null,"abstract":"<div><div>Linear free-surface wave models must satisfy the radiation condition to avoid unphysical solutions. The radiation condition requires that the wave amplitude vanishes at infinite boundaries and waves propagate outward from the source location. The former requirement has received much attention in the literature, but the latter is often ignored. Linear-free surface waves at the deep-water condition are defined by dispersion curves that include two V shaped curves and an additional ring curve when the pulsation frequency is below a certain value. Constraints that enforce both requirements of the radiation condition have been developed and applied to wave solutions associated with each dispersion curve. The two requirements of the radiation condition produce the same constraint for the ring curve and one V shaped curve referred to as the Inner V curve. However, for the second V shaped curve referred to as the Outer V curve, satisfying the requirement of vanishing wave amplitude at infinite boundaries does not guarantee the outgoing condition. When the ring curve exists, this Outer V curve only generates ingoing waves. At higher pulsation frequencies, the dimensionless wavenumber component in the source moving direction should be smaller than the dimensionless frequency to satisfy both requirements of the rdiation conditions. Thus, models that only satisfy vanishing amplitude at infinite boundaries would include ingoing waves associated with this Outer V curve. The wave patterns that include ingoing waves are found to be oversensitive to a small deviation from the steady source motion. The ingoing waves may also affect predictions of the wave amplitude and the wave resistance of the ship.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102594"},"PeriodicalIF":3.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679948","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

Neural network predictions of peak storm tides due to tropical cyclones 由热带气旋引起的风暴潮高峰的神经网络预测

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-11 DOI: 10.1016/j.ocemod.2025.102588

T.A. Cuevas López , B.J. Tucker , J.C. Dietrich , D.L. Anderson , E. Lobaton , J.S. Mariegaard

{"title":"Neural network predictions of peak storm tides due to tropical cyclones","authors":"T.A. Cuevas López , B.J. Tucker , J.C. Dietrich , D.L. Anderson , E. Lobaton , J.S. Mariegaard","doi":"10.1016/j.ocemod.2025.102588","DOIUrl":"10.1016/j.ocemod.2025.102588","url":null,"abstract":"<div><div>Storm-driven flooding is a hazard for coastal communities. Process-based models can predict the combined effects of tides, winds, and flooding due to tropical cyclones, including in real-time, but often with restrictions due to a model’s runtime. Researchers have developed neural networks (NN), trained on libraries of storm surge simulations, to predict flooding in seconds. However, previous NNs ignored interactions with astronomical tides, limited to storms of specific durations, and trained for extreme conditions. In this study, a NN is developed to predict peak values for storm tides (storm surge and tides) at nine stations along the North Carolina coast. For training, a library of storm-tides was developed via process-based model simulations of 1813 synthetic storms based on historical data in the north Atlantic Ocean, but with a specific focus on North Carolina, and then augmented by a factor of 50 via combinations with random tides. Unlike previous NN, this approach incorporates the astronomical tides in the training and uses data augmentation techniques for enhanced generalization. The NN performs well, with root-mean-square errors of about 6 cm and mean bias errors for the extreme storms of about 5 cm. For probabilistic predictions of historical storms, the model can predict for 100 ensemble members in 1 s, and the ranges of peak storm tides are close to their true values.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102588"},"PeriodicalIF":3.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662604","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

Assessment of projected changes in mean and extreme wave power across the Indian coastal sectors under high-emission climate scenarios 高排放气候情景下印度沿海地区平均和极端海浪能的预估变化评估

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-09 DOI: 10.1016/j.ocemod.2025.102592

Anshu Yadav , Prashant Kumar , Bahareh Kamranzad , Prasad Kumar Bhaskaran , Rajni

{"title":"Assessment of projected changes in mean and extreme wave power across the Indian coastal sectors under high-emission climate scenarios","authors":"Anshu Yadav , Prashant Kumar , Bahareh Kamranzad , Prasad Kumar Bhaskaran , Rajni","doi":"10.1016/j.ocemod.2025.102592","DOIUrl":"10.1016/j.ocemod.2025.102592","url":null,"abstract":"<div><div>Projected changes in oceanic and atmospheric conditions due to climate change necessitate a detailed assessment of future wave power (WP) variations along India’s extensive coastline for sustainable energy development and coastal adaptation. This study examines the projected changes in mean and extreme WP along the Indian coastline, with a regional focus on the Arabian Sea, the Bay of Bengal, Lakshadweep, and Andaman and Nicobar Island, under future climate scenarios SSP126 and SSP585 for the period 2071–2100. The Arabian Sea and southern coastal regions exhibit considerable wave energy potential, but expected decreases in WP and increased variability index (VI) pose challenges for long-term exploitation. Key regions such as Gujarat, the Andaman and Nicobar Islands, and Lakshadweep demonstrate substantial variability in WP, with higher variability in future scenarios under SSP5–8.5. Site-specific assessments across 20 locations identified Veraval (Gujarat), Hut Bay (Andaman), and Agatti, Minicoy, and Kalpeni (Lakshadweep) as key sites with both high mean and extreme WP values, characterized by consistently elevated energy levels and stable variability indicating strong potential for reliable wave energy extraction. The findings underscore the importance of integrating climate change projections into strategic energy planning, with a focus on region-specific assessments to ensure sustainable and resilient wave energy development.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102592"},"PeriodicalIF":3.1,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655419","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

Tidal estimates from sun-synchronous satellite altimeters in the Bohai Sea via an improved harmonic analysis model 基于改进谐波分析模型的太阳同步卫星高度计对渤海潮汐的估计

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-09 DOI: 10.1016/j.ocemod.2025.102593

Haidong Pan , Dingqi Wang , Junchuan Sun , Tengfei Xu , Zexun Wei

{"title":"Tidal estimates from sun-synchronous satellite altimeters in the Bohai Sea via an improved harmonic analysis model","authors":"Haidong Pan , Dingqi Wang , Junchuan Sun , Tengfei Xu , Zexun Wei","doi":"10.1016/j.ocemod.2025.102593","DOIUrl":"10.1016/j.ocemod.2025.102593","url":null,"abstract":"<div><div>Multi-satellite altimeters have greatly elevated our understanding of tidal dynamics around the globe. Among all publicly available satellite altimeters, the T/P-Jason series are widely considered as the core of diverse satellite-based tidal investigations. By contrast, sun-synchronous satellites only play auxiliary roles in previous studies mostly due to their pathological aliasing for tidal estimation. In this study, MHACS, an improved version of the classical harmonic analysis model utilizing the smooth nature of tidal admittances, is applied to estimate tidal constants from 24-year sun-synchronous ERS-Envisat-Saral (EES) series in the Bohai Sea. MHACS utilizes the intrinsic natural connections among major tidal constituents to overcome the restrictions of the Rayleigh criterion. Tricky K<sub>1</sub>-P<sub>1</sub>-Sa and K<sub>2</sub>-Ssa pairs as well as S<sub>2</sub> tides in EES series are resolved by MHACS with regularization algorithms (i.e. ridge regression). Practical experiments in the Bohai Sea suggest that tidal estimates from the EES series through MHACS are in high agreement with the FES2014, with an average error of only 2.18 cm. Such consistency indicates the satisfactory performance of MHACS with ridge regression on processing the EES series. Although the proposed method has some limitations, it can potentially be a widely-used tool to extract tides from heterogeneous satellite altimeters including Sentinel series and Surface Water Ocean Topography (SWOT).</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102593"},"PeriodicalIF":3.1,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662605","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

Study on the influence of island chains on the vortex splitting of mesoscale eddies 岛链对中尺度涡旋涡分裂影响的研究

IF 2.9 3区地球科学

Ocean Modelling Pub Date : 2025-07-05 DOI: 10.1016/j.ocemod.2025.102591

Mingze Ji , Xingzhou Jiang , Xiaole Li , Jingyi Lu , He Liu , Xiongbo Zheng

{"title":"Study on the influence of island chains on the vortex splitting of mesoscale eddies","authors":"Mingze Ji , Xingzhou Jiang , Xiaole Li , Jingyi Lu , He Liu , Xiongbo Zheng","doi":"10.1016/j.ocemod.2025.102591","DOIUrl":"10.1016/j.ocemod.2025.102591","url":null,"abstract":"<div><div>In the ocean, there exist multi-scale water movements, among which mesoscale eddies are important carriers of oceanic material and energy transport. These vortices contain substantial kinetic energy and heat, playing a pivotal role in oceanic mass and energy transfer. The presence of islands can alter the movement path, intensity, and structure of vortices, and may even lead to vortex splitting. Vortex-island interactions not only affect local oceanic dynamic conditions but may also have broader impacts on large-scale ocean circulation and material transport. Previous multi-island studies have primarily focused on the range where the ratio of island spacing to mesoscale vortex diameter falls between 0.1 and 0.4. However, in real oceanic environments, cases where this ratio exceeds 0.4 are more common, particularly in multi-island regions such as the Lesser Antilles, where the ratio often reaches 0.6 or higher. To gain a more comprehensive understanding of the interaction mechanisms between island spacing and mesoscale vortices, as well as their dynamic processes across a broader range of ratios, this study employs the Regional Ocean Modeling System to conduct idealized numerical experiments. By varying parameters related to island configurations, we analyze the influence of islands on vortex trajectory and structural evolution, extending the investigation to cases with ratios ranging from 0.13 to 0.67. Based on the numerical simulation results, we propose a dimensionless function <em>y</em> that integrates three island-related variables, characterizing the impact of different island parameters on vortex splitting during vortex-island interactions.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"198 ","pages":"Article 102591"},"PeriodicalIF":2.9,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723024","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

Impact of sea ice friction on ocean tides in the Arctic Ocean, modelling insights at various time and space scales 海冰摩擦对北冰洋海潮的影响，在不同时间和空间尺度上的模拟见解

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-02 DOI: 10.1016/j.ocemod.2025.102590

Mathilde Cancet , Florent H. Lyard , Ergane Fouchet

{"title":"Impact of sea ice friction on ocean tides in the Arctic Ocean, modelling insights at various time and space scales","authors":"Mathilde Cancet , Florent H. Lyard , Ergane Fouchet","doi":"10.1016/j.ocemod.2025.102590","DOIUrl":"10.1016/j.ocemod.2025.102590","url":null,"abstract":"<div><div>Although ocean tides are one of the major contributors to the energy dissipation in the Arctic Ocean, they remain relatively poorly known, particularly their interactions with the ice cover (sea ice and grounded ice). These interactions are often simply ignored in tidal models, or considered through relatively simple combinations with the bottom friction. In this paper, we investigate the response of a regional pan-Arctic ocean tidal model to the friction under the sea ice cover, in order to better understand the influence of this parameter on tidal estimates. Different periods of time, from seasonal to decadal scales, were considered to analyze the impact of the variations in the sea ice cover on the ocean tides, in the region as well as at global scale. Long-distance effects of Arctic sea ice friction are revealed in the global tidal simulations, resulting in variations of several centimeters in the seasonal tidal amplitudes. Tide gauge and satellite altimetry observations were specifically processed to retrieve the tidal harmonic constituents over different periods and different sea ice conditions, to compare with the model simulations. Improving the knowledge on the interaction between the tides and the sea ice cover, and thus the performance of the tidal models in the polar regions, is of particular interest to generate more realistic simulations with ocean circulation models, to contribute to scientific investigations on the changes in the Arctic Ocean, and also to improve the satellite altimetry observation retrievals at high latitudes, as the tidal signals remain a major contributor to the error budget of the satellite altimetry observations in the Arctic Ocean. This work also highlights the difficulty to assess the temporal evolution of tides in model simulations in the Arctic because of the lack of long (i.e. several decades) hourly tide gauge observation records in the area.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102590"},"PeriodicalIF":3.1,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563191","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

Wavelet ocean data assimilation 小波海洋资料同化

IF 3.1 3区地球科学

Ocean Modelling Pub Date : 2025-07-02 DOI: 10.1016/j.ocemod.2025.102589

Bradley Sciacca , Hans Ngodock , Joseph M. D’Addezio , Matthew J. Carrier , Innocent Souopgui

{"title":"Wavelet ocean data assimilation","authors":"Bradley Sciacca , Hans Ngodock , Joseph M. D’Addezio , Matthew J. Carrier , Innocent Souopgui","doi":"10.1016/j.ocemod.2025.102589","DOIUrl":"10.1016/j.ocemod.2025.102589","url":null,"abstract":"<div><div>Due to necessary assumptions of observational errors with an exigency for appropriate and timely inversion in the assimilation, dense observations are thinned and/or altered before being assimilated into ocean models. Historically, this process did not significantly restrict model skill because most of the observation types had a quite coarse horizontal distribution. However, recent advances in observation resolution demand new assimilation approaches, whereby small-scale features are actively corrected in the model background. A novel method is introduced that applies multiscale data assimilation utilizing the wavelet transform. Unlike other currently employed ocean multiscale techniques, this method is performed in a single analysis step. Utilizing the wavelet transform allows for observational information to be retained at all its original grid points, compared to the averaging and removal in traditional techniques, such as super observations. This comes from the unique space and frequency relation available to the wavelet transform, which instead filters the potentially correlated small-scale observation errors at each model grid point. Several six-month identical twin data assimilation experiments were used to validate the method. Results indicate comparable to substantial improvements over super observations. On average, the sea surface temperature RMSE was 39 % lower for the wavelet method over the six-months compared to super observations. The wavelet method was also able to constrain horizontal scales in assimilation 29 km and above compared to 60 km and above for the super observations.</div></div>","PeriodicalId":19457,"journal":{"name":"Ocean Modelling","volume":"197 ","pages":"Article 102589"},"PeriodicalIF":3.1,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572677","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