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Journal articles on the topic 'Tidal Current Constituent Ellipse'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Janeković, I., and M. Kuzmić. "Numerical simulation of the Adriatic Sea principal tidal constituents." Annales Geophysicae 23, no. 10 (2005): 3207–18. http://dx.doi.org/10.5194/angeo-23-3207-2005.

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Abstract. The primary goal of this study was to incorporate data-derived harmonic constants into a complex dynamic model using a form of variational data assimilation, with a view to improve the prediction of 7 dominant tidal constituents in the Adriatic Sea. Firstly, harmonic-constant data for 6 Adriatic stations were fed into a steady-state, 3-D, forward/inverse model to furnish optimal boundary conditions (OBCs). Calculated OBCs were then used to derive individual constituent responses, as well as to synthesise seven-constituent boundary conditions for the time stepping, 3-D model. A separa

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2

Wisha, Ulung Jantama, Ruzana Dhiauddin, and Wisnu Arya Gemilang. "An earth science topic Tidal Ellipses Analysis Based on Flow Model Hydrodynamic Data Acquisition in Mandeh Bay, West Sumatera." Journal of Geoscience, Engineering, Environment, and Technology 4, no. 2 (2019): 93. http://dx.doi.org/10.25299/jgeet.2019.4.2.3115.

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Mandeh Bay is threatened by sedimentation issue caused by the rapid development of marine tourism area which strongly impacts to the environmental degradation. Due to the semi-enclosed area of Mandeh Bay, the tidal current has a significant role in triggering vertical and horizontal transports within the bay. This study aimed to determine the characteristic of tidal current during the southwest monsoon. We developed a hydrodynamic model based on Navier-Stokes equations using a flexible mesh and tidal forecast in which the validation is performed by ADCP data. The simulation results will be use

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3

Camargo, Ricardo de, and Joseph Harari. "Modeling the Paranagua Estuarine Complex, Brazil: tidal circulation and cotidal charts." Revista Brasileira de Oceanografia 51, unico (2003): 23–31. http://dx.doi.org/10.1590/s1413-77392003000100003.

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The tidal circulation in Paranagua Bay (Parana State, Southern Brazil) was studied based on the Princeton Ocean Model. The model domain covered the near shore region and the estuarine area, with about 1 km grid resolution in cross-shore and along-shore directions. Homogeneous and diagnostic distributions for temperature and salinity were used and 12 tidal constituents were considered to specify the elevations at the open boundaries. Tidal analysis of 29-days time series of elevations and currents for each grid point generated corange and cophase lines as well as the correspondent axes of the c

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4

Vianna, Marcio L., and Viviane V. Menezes. "Singular Spectrum Analysis of Nonstationary Tidal Currents Applied to ADCP Data from the Northeast Brazilian Shelf." Journal of Atmospheric and Oceanic Technology 23, no. 1 (2006): 138–51. http://dx.doi.org/10.1175/jtech1824.1.

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Abstract The development of new tools for the analysis of nonstationary currents, including tidal currents, has been the subject of recent research. In this work a method for studies of nonstationary barotropic or baroclinic currents based on empirical orthogonal function (EOF) and singular spectrum analysis (SSA) is proposed. It represents a new alternative to other methods of analysis of tidal currents in strong interaction with nontidal forcing, for example, the continuous wavelet transform. The advantage of the SSA method resides in the fact that it is fast, easy to implement, efficient fo

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5

Wei, Zexun, Guohong Fang, R. Dwi Susanto, et al. "Tidal elevation, current, and energy flux in the area between the South China Sea and Java Sea." Ocean Science 12, no. 2 (2016): 517–31. http://dx.doi.org/10.5194/os-12-517-2016.

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Abstract. The South China Sea (SCS) and the Java Sea (JS) are connected through the Karimata Strait, Gaspar Strait, and the southern Natuna Sea, where the tides are often used as open boundary condition for tidal simulation in the SCS or Indonesian seas. Tides, tidal currents, and tidal energy fluxes of the principle constituents K1, O1, Q1, M2, S2, and N2 at five stations in this area have been analyzed using in situ observational data. The results show that the diurnal tides are the dominant constituents in the entire study area. The constituent K1 has the largest amplitude, exceeding 50 cm,

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6

Wei, Z. X., G. H. Fang, R. D. Susanto, et al. "Tidal elevation, current and energy flux in the area between the South China Sea and Java Sea." Ocean Science Discussions 12, no. 6 (2015): 2831–61. http://dx.doi.org/10.5194/osd-12-2831-2015.

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Abstract. The South China Sea (SCS) and the Java Sea (JS) are connected through the Karimata Strait, Gaspar Strait, and the southern Natuna Sea, where the tides are often used as open boundary condition for tidal simulation in the SCS or Indonesian seas. Tides, tidal currents and tidal energy fluxes of the principle constituents K1, O1, Q1, M2, S2 and N2 at five stations in this area have been analyzed using in-situ observational data. The results show that the diurnal tides are the dominant constituents in the entire study area. The constituent K1 has the largest amplitude, exceeding 50 cm, w

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7

Thi, Kim Tran, Hong Nguyen Thi Thu, Toai Nguyen Cong, Long Nguyen Khac Thanh, Phung Nguyen Ky, and Bay Nguyen Thi. "Mapping Ocean Tidal for the Coast of East Sea Area, Viet Nam, by Using the Numerical Model in Curvilinear Coordinates." Journal of Hunan University Natural Sciences 49, no. 2 (2022): 59–75. http://dx.doi.org/10.55463/issn.1674-2974.49.2.6.

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Tides and their effects on coastal and estuarine water levels are among the most well-known phenomena in coastal research. This study aims to map the tidal constituent features in the near-shore East Sea area, for better understanding of the mechanisms that cause the transport of sediments in the area. Furthermore, the study also points to the potential of tidal energy in the area, clean energy that needs to be studied for exploitation. The authors applied the hydraulic model in the curvilinear coordinates to calculate for 4 main tidal constituents in the near-shore, namely K1, O1, M2, and S2

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8

Tsubono, Takaki, Teruhisa Okada, Kazuhiro Misumi, and Daisuke Tsumune. "MODEL VALIDATION USING A DIAGRAM COMPARING OBSERVED AND SIMULATED TIDES AND TIDAL CURRENT ELLIPSES IN TOKYO BAY." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 185. https://doi.org/10.9753/icce.v38.management.185.

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Numerous regional models have been developed to provide information on ocean conditions, such as temperature, salinity, and currents for the coastal engineering design, aquaculture, and oil spill prediction. Model validation through comparisons between observed and simulated tides is necessary, because tides are relatively dominant and tidal currents affect the vertical mixing. We investigate the usefulness of a diagram (Tsubono, 2022) similar to the Taylor diagram (Taylor, 2001), which shows the amplitudes and phases of observed and simulated tidal constituents simultaneously with the complex

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9

Li, Haoyue, Lin Zhang, Daosheng Wang, and Lin Mu. "Characteristics of Spring Sea Surface Currents near the Pearl River Estuary Observed by a Three-Station High-Frequency Surface Wave Radar System." Remote Sensing 16, no. 4 (2024): 672. http://dx.doi.org/10.3390/rs16040672.

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The processes of ocean dynamics are complex near the Pearl River Estuary and are not clear due to a lack of abundant observations. The spatial characteristics of the spring sea surface currents in the adjacent waters of the Pearl River Estuary were analyzed using the current data observed by a three-station high-frequency surface wave radar system (HFSWRS). Compared with the two-station HFSWRS, the deviation of current velocity and direction observed by the three-station HFSWRS from the underway measurements decreased by 42.86% and 38.30%, respectively. The analyzed results show that the M2 ti

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10

Liu, Zizhou, Shengyi Jiao, Xingchuan Liu, and Xianqing Lv. "Two-Dimensional Numerical Simulation of Tide and Tidal Current of Eight Major Tidal Constituents in the Bohai, Yellow, and East China Seas." Remote Sensing 15, no. 15 (2023): 3735. http://dx.doi.org/10.3390/rs15153735.

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Numerical simulations of the eight major tidal constituents (M2, S2, K1, O1, N2, K2, P1, and Q1) in the Bohai, Yellow and East China Seas (BYES) were conducted using the Regional Ocean Modeling System (ROMS) based on altimeter products from X-TRACK. Tidal harmonic constants and two-dimensional tidal current data with a spatial resolution of 1/12° were obtained. To validate the simulation results (SRs), harmonic constants from altimeters and tide gauges, two sea level anomaly time series, and velocity observations from 12 current meters were utilized. Additionally, data from five tidal models w

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11

Pnyushkov, A. V., and I. V. Polyakov. "Observations of Tidally Induced Currents over the Continental Slope of the Laptev Sea, Arctic Ocean." Journal of Physical Oceanography 42, no. 1 (2012): 78–94. http://dx.doi.org/10.1175/jpo-d-11-064.1.

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Abstract Two year-long (2004–05 and 2005–06) records of currents from two moorings deployed at the continental slope of the Laptev Sea (78°26′N, 125°40′E) are used in order to define the properties of tidal currents in the upper ~200-m ocean layer. Harmonic and spectral analyses of currents showed that the semidiurnal tidal constituent S2 dominates over the semidiurnal M2 and diurnal constituents. This dominance of the S2 constituent in the tidal currents is due to resonant interaction of the superinertial wave with sloping bottom topography. In contrast to the tidal currents, sea level change

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12

Yasuda, Hidekazu. "Vertical structure of the tidal current ellipse in a rotating basin." Journal of the Oceanographical Society of Japan 43, no. 5 (1987): 309–18. http://dx.doi.org/10.1007/bf02108698.

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13

Stanev, E. V., F. Ziemer, J. Schulz-Stellenfleth, J. Seemann, J. Staneva, and K. W. Gurgel. "Blending Surface Currents from HF Radar Observations and Numerical Modeling: Tidal Hindcasts and Forecasts." Journal of Atmospheric and Oceanic Technology 32, no. 2 (2015): 256–81. http://dx.doi.org/10.1175/jtech-d-13-00164.1.

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AbstractAn observation network operating three Wellen Radars (WERAs) in the German Bight, which are part of the Coastal Observing System for Northern and Arctic Seas (COSYNA), is presented in detail. Major consideration is given to expanding the patchy observations over the entire German Bight on a 1-km grid and producing state estimates at intratidal scales, and 6- and 12-h forecasts. This was achieved with the help of the proposed spatiotemporal optimal interpolation (STOI) method, which efficiently uses observations and simulations from a free model run within an analysis window of one or t

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14

Vazquez, Heriberto Jesus, Jose Gomez-Valdes, Modesto Ortiz, and Juan Adolfo Dworak. "Detiding Shipboard ADCP Data in Eastern Boundary Current." Journal of Atmospheric and Oceanic Technology 28, no. 1 (2011): 94–103. http://dx.doi.org/10.1175/2010jtecho697.1.

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Abstract Spatiotemporal fitting by the least squares method is commonly applied to distinguish the mean flow from the tidal current from shipboard ADCP data in coastal ocean. To analyze this technique in a pelagic region of an eastern boundary current system, a 6-yr period of shipboard ADCP data off Baja California is examined. A diverse set of basis functions is studied and a global tidal model is used for comparison purposes. The Gaussian function together with a nodal configuration of one node in the middle and close to the coast of the region is the best option. However, to obtain the opti

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15

Zhang, Yachao, Wei Sha, Xiaojie Zhang, et al. "Analysis of Current at a Continuous Observation Station in the Shallow Water of the Northern Outer Shelf of the East China Sea." Journal of Physics: Conference Series 2486, no. 1 (2023): 012043. http://dx.doi.org/10.1088/1742-6596/2486/1/012043.

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Abstract In this paper, multi-layer current data continuously observed in November 2021 was studied by statistical analysis, spectral analysis, and harmonic analysis in the shallow water area of the northern outer shelf of the East China Sea. The results showed that: during observation, the average velocity was 30.5cm/s, and the maximum velocity was 78.1cm/s. The velocity from 30cm/s to 40cm/s accounts for the largest proportion, and the maximum direction frequency was eastward, up to 12.4%. The stationary flow direction is northward and changes from northeast to northwest with the increase of

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16

Inoue, Ryuichiro, and Chris Garrett. "Fourier Representation of Quadratic Friction." Journal of Physical Oceanography 37, no. 3 (2007): 593–610. http://dx.doi.org/10.1175/jpo2999.1.

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Abstract If a current is composed of a number of constituents with different frequencies, then quadratic friction may be analyzed at the same frequencies. The ratios of the constituents of the friction differ from the ratios for the current itself, with a classic result being that for unidirectional flow a very weak current constituent experiences proportionately 50% more friction than a strong constituent. Here, exact results for the magnitude of the friction constituents are derived and confirmed numerically. The results are applied to the tidal currents in Juan de Fuca Strait and the Strait

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17

Cao, An-Zhou, Bing-Tian Li, and Xian-Qing Lv. "Extraction of Internal Tidal Currents and Reconstruction of Full-Depth Tidal Currents from Mooring Observations." Journal of Atmospheric and Oceanic Technology 32, no. 7 (2015): 1414–24. http://dx.doi.org/10.1175/jtech-d-14-00221.1.

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AbstractTo obtain internal tidal currents and full-depth tidal currents from limited mooring observations, a method is put forward combining harmonic analysis and modal decomposition. Harmonic analysis is used to separate tidal currents of different constituents, and modal decomposition is used to calculate full-depth tidal currents of each mode. By adding the barotropic tidal currents to all the baroclinic ones, the full-depth tidal currents of each constituent are reconstructed. The feasibility and accuracy of the proposed method is tested by twin experiments. Then, the method is used to ext

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18

Kusumawardani, Niken, Rignolda Djamaluddin, Ping Astony Angmalisang, Lusia Manu, and Wilmy Etwil Pelle. "Characteristics of sea surface current during the second transitional monsoon in the Bangka strait, North Sulawesi, Indonesia." AQUATIC SCIENCE & MANAGEMENT 12, no. 1 (2024): 7–13. http://dx.doi.org/10.35800/jasm.v12i1.55445.

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Understanding the dynamics of surface currents in the Bangka Strait is crucial for various maritime and coastal activities. This strait connects Likupang, a super-priority tourism destination, with other islands in North Sulawesi. These activities include navigation safety, inter-island transportation, fisheries, search and rescue operations, and marine pollution control. This study investigated the characteristics of currents in the strait using a hydrodynamic model called Delft3D. The result revealed that the currents exhibit a tidal pattern, with dominant westward flow during floods and eas

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19

Ren, Lei, Guangwei Pan, Lingna Yang, et al. "Assessment of Ocean Circulation Characteristics off the West Coast of Ireland Using HF Radar." Remote Sensing 15, no. 22 (2023): 5395. http://dx.doi.org/10.3390/rs15225395.

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Research on coastal ocean circulation patterns over long time periods is significant for various marine endeavors: environmental protection, coastal engineering construction, and marine renewable energy extraction. Based on sea surface current data remotely observed using a shore-based high frequency radar (HFR) system for one year (2016), spatiotemporal characteristics of surface flow fields of sea surface flow fields along the west coast of Ireland are studied using harmonic analysis, rotary spectral analysis and representative flow fields over different seasons and the whole year. Coastal s

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20

Chen, Jian, Jianyu Chen, Zhengyi Cao, and Yu Shen. "Improving Surface Current Estimation From Geostationary Ocean Color Imager Using Tidal Ellipse and Angular Limitation." Journal of Geophysical Research: Oceans 124, no. 6 (2019): 4322–33. http://dx.doi.org/10.1029/2019jc015027.

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21

Flores, Raúl P., Sabine Rijnsburger, Alexander R. Horner-Devine, Nirnimesh Kumar, Alejandro J. Souza, and Julie D. Pietrzak. "The Formation of Turbidity Maximum Zones by Minor Axis Tidal Straining in Regions of Freshwater Influence." Journal of Physical Oceanography 50, no. 5 (2020): 1265–87. http://dx.doi.org/10.1175/jpo-d-18-0264.1.

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AbstractThis study investigates the influence of tidal straining in the generation of turbidity maximum zones (TMZ), which are observed to extend for tens of kilometers along some shallow, open coastal seas. Idealized numerical simulations are conducted to reproduce the cross-shore dynamics and tidal straining in regions of freshwater influence (ROFIs), where elliptical current patterns are generated by the interaction between stratification and a tidal Kelvin wave. Model results show that tidal straining leads to cross-shore sediment convergence and the formation of a nearshore TMZ that is de

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22

Kusuma, Hollanda Arief, Muhammad Zainuddin Lubis, Nadya Oktaviani, and Dwi Eny Djoko Setyono. "Tides Measurement and Tidal Analysis at Jakarta Bay." Journal of Applied Geospatial Information 5, no. 2 (2021): 494–501. http://dx.doi.org/10.30871/jagi.v5i2.2779.

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Tides observation conducted for these purposes such as real-time depth of water, determination mean sea level and other tidal datums to establish a system of tidal benchmarks and data for production of tide and tidal current predictions. Center for Marine and Coastal Mapping – Geospatial Information System used water level and tides data mainly to correct the water depth measurement to chart datum. This study uses sea level observation data conducted from 20th February 2018 until 4th April 2018 at Marina Batavia, Jakarta. This study found that tidal types at this location is mixed diurnal usin

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Lu, Jingfang, Yibo Zhang, Xianqing Lv, and Honghua Shi. "The Temporal Evolution of Coastlines in the Bohai Sea and Its Impact on Hydrodynamics." Remote Sensing 14, no. 21 (2022): 5549. http://dx.doi.org/10.3390/rs14215549.

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Over the past 40 years, increasing coastal reclamation and natural sedimentation has changed coastline positions and resulted in variation in the hydrodynamic environment in the Bohai Sea (BHS), China. Based on the Landsat series images, an interpretative identifier for identifying the coastline was proposed to assess the hydrodynamic changes caused by the coastline change and was applied to a typical case of the Bohai Sea (BHS), China. We combined a grid-based coastline position with an adjoint data assimilation method to seamlessly map the distribution of the amplitude, phase lag, and tidal

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24

Ji, Xiaomei, Liming Huang, Wei Zhang, and Peng Yao. "On the Mechanism behind the Variation of the Tidal Current Asymmetry in Response to Reclamations in Lingding Bay, China." Journal of Marine Science and Engineering 10, no. 7 (2022): 951. http://dx.doi.org/10.3390/jmse10070951.

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Tidal current asymmetry, an important factor for waterborne substance transport, is strongly affected by the changing shoreline. Lingding Bay (LDB), located in the center of the Guangdong-Hong Kong-Macao Greater Bay Area, has suffered great shoreline changes since the 1970s. A well-validated numerical model is built to investigate how the changing shoreline impacts tidal current asymmetry, which is quantified by the skewness parameter. Two types of tidal current asymmetries, the flow velocity asymmetry (FVA) and the flow duration asymmetry (FDA), are considered here. Despite their different do

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25

Kushadiwijayanto, Arie Antasari, Yusuf Arief Nurrahman, Mega Sari Juane Sofiana, and Ikha Safitri. "Pasang Surut dan Arus di Muara Sungai Kapuas Sepok Pangkalan, Teluk Bengkolan, Kalimantan Barat." MANFISH JOURNAL 5, no. 1 (2024): 43–47. http://dx.doi.org/10.31573/manfish.v5i1.774.

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Tides and currents influence the dynamics and biochemical circulation in a bay or estuary. This research aims to conduct an initial study of tides and currents in Bengkolan Bay, which is home to the mangrove ecosystem in West Kalimantan Province. Elevation and current measurements were carried out for 15 days at the mouth of the Kapuas River Sepok Pangkalan (north side of Bengkolan Bay) using tidal palms and drifters. The measurement results show that the pattern of water surface movement and currents at the research location is very dependent on ocean tidal patterns. Diurnal tides play a very

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26

Hasanudin, Muhammad, Edi Kusmanto, and Wahyu Budisetyawan. "Amplifikasi pasang surut dan dampaknya terhadap Perairan Probolinggo." Oseanologi dan Limnologi di Indonesia 1, no. 3 (2016): 69. http://dx.doi.org/10.14203/oldi.2016.v1i3.72.

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<strong>Tidal Amplification and Its Impact to Probolinggo Coastal Waters.</strong> Rob flood that frequently struck the coast of Probolinggo is an interesting phenomenon. Tidal flood, tidal flats, and sedimentation is strongly associated with the tides. Therefore, this study of tidal amplification and its estimated impacts on the coastal waters of Probolinggo was conducted. Tidal measurements were done with RBR TWR-2050 every 5 minutes for 30 days. Measurements of flow and depth were performed with the Acoustic Doppler Current Profiler (ADCP) 1200 KHz along the trajectory of the bo

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ROBERTSON, ROBIN, AIKE BECKMANN, and HARTMUT HELLMER. "M2 tidal dynamics in the Ross Sea." Antarctic Science 15, no. 1 (2003): 41–46. http://dx.doi.org/10.1017/s0954102003001044.

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In certain regions of the Southern Ocean, tidal energy is believed to foster the mixing of different water masses, which eventually contribute to the formation of deep and bottom waters. The Ross Sea is one of the major ventilation sites of the global ocean abyss and a region of sparse tidal observations. We investigated M2 tidal dynamics in the Ross Sea using a three-dimensional sigma coordinate model, the Regional Ocean Model System (ROMS). Realistic topography and hydrography from existing observational data were used with a single tidal constituent, the semi-diurnal M2. The model fields fa

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28

Johnson, Eric S., and Michael L. Van Woert. "Tidal currents of the Ross Sea and their time stability." Antarctic Science 18, no. 1 (2006): 141–54. http://dx.doi.org/10.1017/s0954102006000137.

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Current measurements obtained from a sparse array of moorings on the Ross Continental Shelf during the 1980 and 90s are analysed for their tidal constituents. Diurnal (K1 and O1) tides are about five times stronger than semi-diurnal tides, and are strongest near the shelf break in agreement with recent model results. At some energetic locations the diurnal tides are significantly weaker at depth, presumably due to bottom friction. Complex demodulation analysis shows that at some locations the tidal response varies significantly in time. This time variability rises markedly above the noise floo

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Byun, Do-Seong, and Deirdre E. Hart. "A robust interpolation procedure for producing tidal current ellipse inputs for regional and coastal ocean numerical models." Ocean Dynamics 67, no. 3-4 (2017): 451–63. http://dx.doi.org/10.1007/s10236-017-1037-4.

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30

Souza, A. J. "On the use of the Stokes number to explain frictional tidal dynamics and water column structure in shelf seas." Ocean Science 9, no. 2 (2013): 391–98. http://dx.doi.org/10.5194/os-9-391-2013.

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Abstract. In recent years coastal oceanographers have suggested using the "Strouhal" number or its inverse, the "Stokes" number, to describe the effect of bottom boundary layer turbulence on the vertical structure of both density and currents. These are defined as the ratios of the frictional depth (δ) to the water column depth (h) or vice versa. Although many researchers have mentioned that the effects of the earth's rotation should be important, they have tended to omit it. Rotation may have an important influence on tidal currents, as the frictional depth from a fully cyclonic to a fully an

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Tang, Yuezhao, Yang Wang, Enjin Zhao, et al. "Study on Hydrodynamic Characteristics and Environmental Response in Shantou Offshore Area." Journal of Marine Science and Engineering 9, no. 8 (2021): 912. http://dx.doi.org/10.3390/jmse9080912.

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As a coastal trading city in China, Shantou has complex terrain and changeable sea conditions in its coastal waters. In order to better protect the coastal engineering and social property along the coast, based on the numerical simulation method, this paper constructed a detailed hydrodynamic model of the Shantou sea area, and the measured tide elevation and tidal current were used to verify the accuracy of the model. Based on the simulation results, the tide elevation and current in the study area were analyzed, including the flood and ebb tides of astronomical spring tide, the flood and ebb

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32

Ma, Youzhi, Wenbin Yin, Zheng Guo, and Jiliang Xuan. "The Ocean Surface Current in the East China Sea Computed by the Geostationary Ocean Color Imager Satellite." Remote Sensing 15, no. 8 (2023): 2210. http://dx.doi.org/10.3390/rs15082210.

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High-frequency observations of surface current field data over large areas and long time series are imperative for comprehending sea-air interaction and ocean dynamics. Nonetheless, neither in situ observations nor polar-orbiting satellites can fulfill the requirements necessary for such observations. In recent years, geostationary satellite data with ultra-high temporal resolution have been increasingly utilized for the computation of surface flow fields. In this paper, the surface flow field in the East China Sea is estimated using maximum cross-correlation, which is the most widely used flo

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Matte, Pascal, David A. Jay, and Edward D. Zaron. "Adaptation of Classical Tidal Harmonic Analysis to Nonstationary Tides, with Application to River Tides." Journal of Atmospheric and Oceanic Technology 30, no. 3 (2013): 569–89. http://dx.doi.org/10.1175/jtech-d-12-00016.1.

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Abstract One of the most challenging areas in tidal analysis is the study of nonstationary signals with a tidal component, as they confront both current analysis methods and dynamical understanding. A new analysis tool has been developed, NS_TIDE, adapted to the study of nonstationary signals, in this case, river tides. It builds the nonstationary forcing directly into the tidal basis functions. It is implemented by modification of T_TIDE; however, certain concepts, particularly the meaning of a constituent and the Rayleigh criterion, are redefined to account for the smearing effects on the ti

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34

Ho, Chung-Ru, Kai-Ho Cheng, Zhe-Wen Zheng, Hung-Jen Lee, and Tai-Wen Hsu. "Characteristics Analysis of Acoustic Doppler Current Profile Measurements in Northeast Taiwan Offshore." Journal of Marine Science and Engineering 12, no. 9 (2024): 1632. http://dx.doi.org/10.3390/jmse12091632.

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A comprehensive study was conducted at a wave energy device test site located off the northeastern coast of Taiwan to assess the influence of oceanic currents on experimental equipment. A bottom-mounted 600 kHz acoustic Doppler current profiler, equipped with integrated temperature and pressure sensors, was deployed at a depth of approximately 31 m. This study, spanning from 6 June 2023 to 11 May 2024, recorded ocean current profiles by assembling data from 50 pings every 10 min, with a resolution of one meter per depth layer. The findings reveal that variations in water levels were predominan

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Herrera, J. L., R. A. Varela, and G. Rosón. "Spatial variability of the barotropic M2 constituent tidal current over the Rías Baixas Galician shelf (NW Spain)." Journal of Marine Systems 72, no. 1-4 (2008): 189–99. http://dx.doi.org/10.1016/j.jmarsys.2007.07.006.

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36

Suanda, Sutara H., and John A. Barth. "Semidiurnal Baroclinic Tides on the Central Oregon Inner Shelf." Journal of Physical Oceanography 45, no. 10 (2015): 2640–59. http://dx.doi.org/10.1175/jpo-d-14-0198.1.

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AbstractSemidiurnal velocity and density oscillations are examined over the mid- and inner continental shelf near Heceta Bank on the Oregon coast. Measurements from two long-term observation networks with sites on and off the submarine bank reveal that both baroclinic velocities and displacements are dominated by the first mode, with larger velocities on the midshelf and northern parts of the bank. Midshelf sites have current ellipses that are near the theoretical value for single, progressive internal tidal waves compared to more linearly polarized currents over the inner shelf. Baroclinic cu

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Isnaeni, Kholillah Y., Hanif Diastomo, Candidad A. D. S. Nusantara, and Wiwin Windupranata. "Understanding the Oceanography Condition in Java Sea using Hydrodynamic Simulation for Patimban Port Development." IOP Conference Series: Earth and Environmental Science 1047, no. 1 (2022): 012011. http://dx.doi.org/10.1088/1755-1315/1047/1/012011.

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Abstract This study's purpose is to gain knowledge and information on the hydrodynamic condition in the Java Sea, North Subang Region. The data was compiled from ECMWF for wind data and TMD for tide constituent data as a hydrodynamic model generator and the field data taken from a field survey in 2020 and 4 tide station BIG (Jakarta (3) and Cirebon (1)). The software developed by Deltares (DELFT3D) was used for hydrodynamic simulation to simulate hydrodynamic conditions (water level and current). A structured rectangular grid was used to construct domain boundary model on the north coast of We

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Rosier, Sebastian H. R., and G. Hilmar Gudmundsson. "Exploring mechanisms responsible for tidal modulation in flow of the Filchner–Ronne Ice Shelf." Cryosphere 14, no. 1 (2020): 17–37. http://dx.doi.org/10.5194/tc-14-17-2020.

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Abstract. An extensive network of GPS sites on the Filchner–Ronne Ice Shelf and adjoining ice streams shows strong tidal modulation of horizontal ice flow at a range of frequencies. A particularly strong (horizontal) response is found at the fortnightly (Msf) frequency. Since this tidal constituent is absent in the (vertical) tidal forcing, this observation implies the action of some non-linear mechanism. Another striking aspect is the strong amplitude of the flow perturbation, causing a periodic reversal in the direction of ice shelf flow in some areas and a 10 %–20 % change in speed at groun

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VAN OYEN, TOMAS, and PAOLO BLONDEAUX. "Grain sorting effects on the formation of tidal sand waves." Journal of Fluid Mechanics 629 (June 15, 2009): 311–42. http://dx.doi.org/10.1017/s0022112009006387.

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A model is developed to investigate the process which leads to the formation of sand waves in shallow tidal seas characterized by a heterogeneous sea bed composition. The main goal of the analysis is the evaluation of the effects that a graded sediment has on the formation of the bottom forms and the investigation of the sorting process induced by the growth of the bottom forms. The analysis is based on the study of the stability of the flat bed configuration, i.e. small amplitude perturbations are added to the flat bottom and a linear analysis of their time development is made. For an oscilla

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Pattiaratchi, Charitha B., and Peter T. Harris. "Hydrodynamic and sand-transport controls on en echelon sandbank formation: an example from Moreton Bay, eastern Australia." Marine and Freshwater Research 53, no. 7 (2002): 1101. http://dx.doi.org/10.1071/mf01288.

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Current meter observations from a field of en echelon sandbanks in Moreton Bay, Australia, provide insights into sandbank hydrodynamics and development. Re-circulation of sand is occurring around straight-crested, near-shore banks, but not around offshore, 'S'-shaped banks. Rather, net transport over this latter area is unidirectional (flood dominated). This is explained in the context of the evolution of the banks, in which the mature, near-shore banks have grown vertically upwards to the sea surface and thus contribute to the local generation of higher tidal harmonics and a residual current

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Adnyani, Luh Putri, Scott Draper, Hong Wei An, and Liang Cheng. "Modelling Sand Wave Evolution and Migration in North Sea Using ROMS." Applied Mechanics and Materials 924 (December 30, 2024): 139–52. https://doi.org/10.4028/p-e52noj.

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Sand waves are large and transverse bed features, typically with lengths and heights of about 100-500 m and 2-10 m, respectively. The height can grow up to 30% of the average water depth, especially in shallow water conditions. Sand waves can migrate up to around 10 m/year and may profoundly impact subsea infrastructure, such as offshore pipelines and cables, key elements of offshore energy development. In this study, the evolution and migration of sand waves in the Dutch shoreface, North Sea 1986, was investigated using the Regional Oceanographic Modeling System (ROMS) and validated with DELF

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Koenig, Zoe, Eivind H. Kolås, and Ilker Fer. "Structure and drivers of ocean mixing north of Svalbard in summer and fall 2018." Ocean Science 17, no. 1 (2021): 365–81. http://dx.doi.org/10.5194/os-17-365-2021.

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Abstract. The Arctic Ocean is a major sink for heat and salt for the global ocean. Ocean mixing contributes to this sink by mixing the Atlantic- and Pacific-origin waters with surrounding waters. We investigate the drivers of ocean mixing north of Svalbard, in the Atlantic sector of the Arctic, based on observations collected during two research cruises in summer and fall 2018. Estimates of vertical turbulent heat flux from the Atlantic Water layer up to the mixed layer reach 30 W m−2 in the core of the boundary current, and average to 8 W m−2, accounting for ∼1 % of the total heat loss of the

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Dr, Ahsan Iqbal Mehak Fatima Zeeshan Paras Khan. "PROPERTIES OF RESTFULNESS THROUGH MIDAZOLAM OR ELSE PROPOFOL DISTILLATION ON PRESSURE HORMONE IN ADDITION HR ERRATICISM IN VERTEBRAL ANESTHESIA." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES o6, no. 06 (2019): 11590–93. https://doi.org/10.5281/zenodo.3240914.

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<strong><em>Objective: </em></strong><em>Restfulness through midazolam or else propofol got belongings on understanding also parasympathetic movement throughout backbone anesthesia through eradicating influence of worry also pressure. This current research remained showed to associate belongings of restfulness through midazolam in addition propofol on cardiac understanding also parasympathetic movement also pressure hormone in cases with backbone anesthesia.</em> <strong><em>Methodology: </em></strong><em>Our current research was randomized measured non-blind research that remained conducted a

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Wang, Daosheng, Zhixuan Luo, and Lin Mu. "Numerical Study on the Influence of Model Uncertainties on the Transport of Underwater Spilled Oil." International Journal of Environmental Research and Public Health 19, no. 15 (2022): 9274. http://dx.doi.org/10.3390/ijerph19159274.

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Oil pollution influences marine biology, ecology, and regional sustainable development capacity, but model uncertainties limit the ability of the numerical model to accurately predict the transport and fate of the underwater oil spill. Based on a three-dimensional underwater oil spill model validated by satellite images of the oil slick at the sea surface, the Penglai 19-3 oil spill accident in the Bohai Sea was simulated; in addition, several sensitivity experiments were set up to investigate the influence of model uncertainties in the background wind, current, start time of the oil spill, an

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Kim, Seong Hyeon, Bok Kyoung Choi, and Byoung-Nam Kim. "Correlation between Underwater Noise and Sea Level at Ieodo Ocean Research Station." Journal of Marine Science and Engineering 9, no. 1 (2020): 1. http://dx.doi.org/10.3390/jmse9010001.

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To investigate the correlation between underwater noise and sea level, data collected at Ieodo Ocean Research Station (from 15 May to 27 August 2013) were analyzed. Temporal variations in the overall level of underwater noise were similar to those in sea level. The average underwater noise levels at frequencies below 50 Hz were 99.0–106.6 dB during spring tides and 78.4–90.2 dB during neap tides, with a difference of 12.6–20.6 dB. When low-pass filtering at six hours was applied to the absolute value of sea level, a high correlation coefficient of 0.7 for its association with underwater noise

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Altaş, Furkan, and Mehmet Öztürk. "Water Level Predictions at Both Entrances of a Sea Strait by Using Machine Learning." Water 16, no. 16 (2024): 2335. http://dx.doi.org/10.3390/w16162335.

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In this study, we employed a novel machine learning (ML) methodology to predict water levels (WLs) from their constituent components at both entrances of a sea strait, namely the Bosphorus. The principal components of WLs in the strait are mean sea level pressure (MSLP), wind speeds (W, U, V), discharges from the Danube River (Q), and tidal conditions (T). Following the application of the t-test, SFS, PCA, and VIF analyses, and the consideration of a range of ML techniques (including Linear Regression (LR), Regression Trees (RT), Support Vector Machine Regression (SVMR), Gaussian Process Regre

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Naeem, Ahmed Syed. "The Study of Tidal Current Dynamics and Impact of Bathymetry in Training the Currents along the Coast of Karachi, Pakistan." December 23, 2019. https://doi.org/10.19070/2577-4395-1900015.

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Tidal dynamics including water level variation and movement describe the characteristics of a coastal area. The tidal elevation of Pakistan has been well documented, however, tidal current characteristics is least known. This study was designed to understand the tidal current by analyzing the time series current data collected from rocky coastal area of Karachi. Tidal currents were resolved totidal constituent species by ellipses. The results of the study show that semidiurnal tidal species in the Karachi shallow waters are larger than the diurnal species making it as mixed mainly semidiurnal

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Chen, Si, Erik P. Kvale, Ronald J. Steel, Cornel Olariu, and Jinyu Zhang. "Estimating paleotidal constituents from Pliocene “tidal gauges”—an example from the paleo-Orinoco Delta, Trinidad." GSA Bulletin, April 17, 2023. http://dx.doi.org/10.1130/b36619.1.

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The Neogene Orinoco Delta is one of the typical river deltas where both the records of modern and ancient tidal processes can be studied. A ∼5 m.y./&gt;10-km-thick succession on the island of Trinidad contains remnants of paleo-Orinoco deltaic deposition preserving both tide- and wave-influenced delta lobes within the same time intervals, just like the modern Orinoco Delta that has both wave-dominated and tidal-dominated lobes. The tide-influenced delta lobes and estuaries preserve some spectacular tidal bedding signals, including tidal rhythmites. The tidal record encoded within the tidal

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HENDRAWAN, GEDE, I. WAYAN NUARSA, WAYAN SANDI, A.F. KOROPITAN, and YASUHIRO SUGIMORI. "NUMERICAL CALCULATION FOR THE RESIDUAL TIDAL CURRENT IN BENOA BAY-BALI ISLAND." International Journal of Remote Sensing and Earth Sciences (IJReSES) 2, no. - (2010). http://dx.doi.org/10.30536/j.ijreses.2005.v2.a1362.

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Princeton Ocean Model (POM) was used to calculate the tidal current and M2-residual current in Benoa Bay using barotropic model (mode 2). The model was forced by tidal elevation, which was given along the open boundary condition using tide data prediction from Hydro-Oceanography Division-Indonesian Navy (DISHIDROS TNI-AL). The computed tidal current and residual current have been compared with both data in Benoa Bay, that are data of the open boundary of Benoa Bay and condition of Benoa Bay after developed a port and reclamation of Serangan Island. The maximum velocity of tidal current for ope

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Kachelein, Luke, Sarah T. Gille, Matthew R. Mazloff, and Bruce D. Cornuelle. "Characterizing Non‐Phase‐Locked Tidal Currents in the California Current System Using High‐Frequency Radar." Journal of Geophysical Research: Oceans 129, no. 7 (2024). http://dx.doi.org/10.1029/2023jc020340.

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AbstractOver 9 years of hourly surface current data from high‐frequency radar (HFR) off the US West Coast are analyzed using a Bayesian least‐squares fit for tidal components. The spatial resolution and geographic extent of HFR data allow us to assess the spatial structure of the non‐phase‐locked component of the tide. In the frequency domain, the record length and sampling rate allow resolution of discrete tidal lines corresponding to well‐known constituents and the near‐tidal broadband elevated continuum resulting from amplitude and phase modulation of the tides, known as cusps. The FES2014

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