Artykuły w czasopismach na temat „Tidal dynamics”

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1

Charlier, Roger H. "Tidal Dynamics". International Journal of Environmental Studies 67, nr 3 (czerwiec 2010): 466–67. http://dx.doi.org/10.1080/00207230601124740.

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2

Вольцингер, Наум Евсеевич, i Алексей Анатольевич Андросов. "Extreme nonhydrostatic tidal dynamics". Вычислительные технологии, nr 2(24) (17.04.2019): 37–51. http://dx.doi.org/10.25743/ict.2019.24.2.004.

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Моделирование длинноволновых океанологических процессов традиционно выполняется в гидростатическом (Гс) приближении, обеспечивающем высокую точность расчета гидрофизических полей, когда вертикальным ускорением движения можно пренебречь. На горном рельефе это не так, и учет динамической компоненты давления становится необходимым. Негидростатическое (Нг) моделирование крупномасштабных океанологических явлений реализуется решением 3D краевой гидродинамической задачи. Структуру метода составляют этапы решения Гс-задачи, краевой задачи для уравнения Пуассона (Нг) и коррекции полей гидрофизических характеристик. Значимость Нг-фактора выявляется при рассмотрении безразмерного вида уравнений, когда безразмерные параметры характеризуют горный рельеф области. Случай резких изменений рельефа, требующий решения Нг-задачи, - пролив Ломбок. Приводятся оценки Нг-фактора в водообмене между океанами, результаты сравнения спектров вертикальной скорости в Гс- и Нг-постановках. Modelling of long-wave oceanological processes is traditionally performed in a hydrostatic (Hs) approximation, which ensures high accuracy of the calculation of hydrophysical fields, when the vertical acceleration of vertical motion can be neglected. In mountainous terrain, this is not the case, and consideration of the dynamic pressure component becomes necessary. Non-hydrostatic (Nh) modelling of large-scale oceanological phenomena is implemented by solving hydrodynamic boundary value problem in an arbitrary 3D domain. The structure of the method consists of the stages of solving the Hs problem, the boundary value problem for the Poisson equation (Nh), and the correction of the fields of hydrophysical characteristics. That is the pressure is presented as a sum of its hydrostatic and dynamical components. Significance of Nh is revealed when considering the dimensionless type of equations, when dimensionless parameters characterize the mountain relief of the region. The Lombok Strait having a complex morphometric structure is an important link in the water exchange between the Pacific and Indian Oceans, it has been chosen as the object for modelling. Estimates of the role of Nh in water exchange between the oceans are given using the comparison of the solution for problems in Hs and Nh sets. It indicates the need to take into account Nh in conditions of pronounced sea mountain relief.
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3

Chicone, C., i B. Mashhoon. "Tidal dynamics in Kerr spacetime". Classical and Quantum Gravity 23, nr 12 (17.05.2006): 4021–33. http://dx.doi.org/10.1088/0264-9381/23/12/002.

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4

Mashhoon, Bahram, Nader Mobed i Dinesh Singh. "Tidal dynamics in cosmological spacetimes". Classical and Quantum Gravity 24, nr 20 (2.10.2007): 5031–46. http://dx.doi.org/10.1088/0264-9381/24/20/008.

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5

Fabrycky, Daniel C. "Tidal dynamics of transiting exoplanets". Proceedings of the International Astronomical Union 6, S276 (październik 2010): 252–57. http://dx.doi.org/10.1017/s1743921311020278.

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AbstractTransits give us the mass, radius, and orbital properties of the planet, all of which inform dynamical theories. Two properties of the hot Jupiters suggest they had a dramatic origin via tidal damping from high eccentricity. First, the tidally circularized planets (in the 1-4 day pile-up) lie along a relation or boundary in the mass-period plane. This observation may implicate a tidal damping process regulated by planetary radius inflation and Roche lobe overflow, early in the planets' lives. Second, the host stars of many planets have spins misaligned from the planets' orbits. This observation was not expected a priori from the conventional disk migration theory, and it was a boon for the alternative theories of planet-planet scattering and Kozai cycles, accompanied by tidal friction, which predicted it. Now we are faced with a curious observation that the misalignment angle depends on the stellar temperature. It may mean that the tide raised on the stars realigns them, the final result being the tidal consumption of hot Jupiters.
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6

Bakker, C. "Tidal mixing and plankton dynamics". Aquatic Botany 31, nr 3-4 (sierpień 1988): 380–82. http://dx.doi.org/10.1016/0304-3770(88)90031-9.

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7

Anderson, Christopher J., i B. Graeme Lockaby. "Foliar nutrient dynamics in tidal and non-tidal freshwater forested wetlands". Aquatic Botany 95, nr 2 (sierpień 2011): 153–60. http://dx.doi.org/10.1016/j.aquabot.2011.05.010.

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8

Cardone, G., A. Fouetio, S. Talla Lando i J. L. Woukeng. "Global dynamics of stochastic tidal equations". Nonlinear Analysis 225 (grudzień 2022): 113137. http://dx.doi.org/10.1016/j.na.2022.113137.

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9

Hoitink, A. J. F., i D. A. Jay. "Tidal river dynamics: Implications for deltas". Reviews of Geophysics 54, nr 1 (marzec 2016): 240–72. http://dx.doi.org/10.1002/2015rg000507.

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10

Battiston, L., i D. Zambella. "Noise-driven intermittency in tidal dynamics". Il Nuovo Cimento D 14, nr 12 (grudzień 1992): 1255–71. http://dx.doi.org/10.1007/bf02456782.

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11

ROBERTSON, ROBIN, AIKE BECKMANN i HARTMUT HELLMER. "M2 tidal dynamics in the Ross Sea". Antarctic Science 15, nr 1 (19.02.2003): 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 faithfully reproduced the major features of the tidal circulation and had reasonable agreement with ten existing tidal elevation observations and forty-two existing tidal current measurements. The differences were attributed primarily to topographic errors. Internal tides were generated at the continental shelf/slope break and other areas of steep topography. Strong vertical shears in the horizontal velocities occurred under and at the edges of the Ross Ice Shelf and along the continental shelf/slope break. Estimates of lead formation based on divergence of baroclinic velocities were significantly higher than those based on barotrophic velocities, reaching over 10% at the continental shelf/slope break.
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12

Rovira-Navarro, Marc, Isamu Matsuyama i Hamish C. F. C. Hay. "Thin-shell Tidal Dynamics of Ocean Worlds". Planetary Science Journal 4, nr 2 (1.02.2023): 23. http://dx.doi.org/10.3847/psj/acae9a.

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Abstract Several solar system moons harbor subsurface water oceans; extreme internal heating or solar irradiation can form magma oceans in terrestrial bodies. Tidal forces drive ocean currents, producing tidal heating that affects the thermal−orbital evolution of these worlds. If the outermost layers (ocean and overlying shell) are thin, tidal dynamics can be described using thin-shell theory. Previous work assumed that the ocean and shell's thickness and density are uniform. We present a formulation of thin-shell dynamics that relaxes these assumptions and apply it to several cases of interest. The tidal response of unstratified oceans of constant thickness is given by surface gravity and Rossby waves, which can resonate with the tidal force. The oceans of the outer solar system are too thick for gravity wave resonances, but high-amplitude Rossby waves can be excited in moons with high orbital obliquity. We find that meridional ocean thickness variations hinder the excitation of Rossby waves, decreasing tidal dissipation and increasing the inclination damping timescale, which allows us to reconcile the present inclination of the Moon with the existence of a past long-lived magma ocean and to explain the inclination of Titan and Callisto without invoking a recent excitation. Stratified oceans can support internal gravity waves. We show that dissipation due to internal waves can exceed that resulting from surface gravity waves. For Enceladus, it can be close to the moon’s thermal output, even if the ocean is weakly stratified. Shear due to internal waves can result in Kelvin–Helmholtz instabilities and induce ocean mixing.
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13

Cardone, Giuseppe, Aurelien Fouetio i Jean Louis Woukeng. "Homogenization of a 2D Tidal Dynamics Equation". Mathematics 8, nr 12 (12.12.2020): 2209. http://dx.doi.org/10.3390/math8122209.

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This work deals with the homogenization of two dimensions’ tidal equations. We study the asymptotic behavior of the sequence of the solutions using the sigma-convergence method. We establish the convergence of the sequence of solutions towards the solution of an equivalent problem of the same type.
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14

Nielsen, Peter. "Tidal dynamics of the watertable in beaches". Water Resources Research 26, nr 9 (1990): 2127–34. http://dx.doi.org/10.1029/90wr00726.

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15

Malačič, Vlado, Dino Viezzoli i Benoit Cushman-Roisin. "Tidal dynamics in the northern Adriatic Sea". Journal of Geophysical Research: Oceans 105, nr C11 (15.11.2000): 26265–80. http://dx.doi.org/10.1029/2000jc900123.

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16

Miner, M. D., M. A. Kulp, D. M. FitzGerald i I. Y. Georgiou. "Hurricane-associated ebb-tidal delta sediment dynamics". Geology 37, nr 9 (1.09.2009): 851–54. http://dx.doi.org/10.1130/g25466a.1.

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17

Galvin, Cyril. "Hydrodynamics and sediment dynamics of tidal inlets". Coastal Engineering 15, nr 5-6 (październik 1991): 595–99. http://dx.doi.org/10.1016/0378-3839(91)90029-g.

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18

Hawley, Nathan. "Hydrodynamics and sediment dynamics of tidal inlets". Sedimentary Geology 75, nr 1-2 (grudzień 1991): 167–68. http://dx.doi.org/10.1016/0037-0738(91)90060-q.

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19

Bonneton, P., N. Bonneton, J. P. Parisot i B. Castelle. "Tidal bore dynamics in funnel-shaped estuaries". Journal of Geophysical Research: Oceans 120, nr 2 (luty 2015): 923–41. http://dx.doi.org/10.1002/2014jc010267.

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20

Khojasteh, Danial, Shengyang Chen, Stefan Felder, Valentin Heimhuber i William Glamore. "Estuarine tidal range dynamics under rising sea levels". PLOS ONE 16, nr 9 (20.09.2021): e0257538. http://dx.doi.org/10.1371/journal.pone.0257538.

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How an estuary responds to sea level rise (SLR) is complex and depends on energy drivers (e.g., tides and river inflows), estuarine geometry (e.g., length and depth), intrinsic fluid properties (e.g., density), and bed/bank roughness. While changes to the tidal range under SLR can impact estuarine sediment transport, water quality, and vegetation communities, studies on the altered tidal range under SLR are often based on case studies with outcomes applicable to a specific site. As such, this study produced a large ensemble of estuarine hydrodynamic models (>1800) to provide a systematic understanding of how tidal range dynamics within different estuary types may change under various SLR and river inflow scenarios. The results indicated that SLR often amplifies the tidal range of different estuary types, except for short estuaries with a low tidal range at the mouth where SLR attenuates the tides. SLR alters the location of the points with minimum tidal range and overall tidal range patterns in an estuary. Variations in tidal range were more evident in converging estuaries, shallower systems, or in estuaries with strong river inflows. These findings provide an indication of how different estuary types may respond to estuaries and may assist estuarine managers and decision makers.
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21

Sentchev, Alexei, Jérôme Thiébot, Anne-Claire Bennis i Matthew Piggott. "New insights on tidal dynamics and tidal energy harvesting in the Alderney Race". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, nr 2178 (27.07.2020): 20190490. http://dx.doi.org/10.1098/rsta.2019.0490.

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The Introduction presents motivations, significance and some key points of the research activities performed in the Alderney Race. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.
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22

Makarov, Valeri V., Ciprian T. Berghea i Michael Efroimsky. "Spin-orbital Tidal Dynamics and Tidal Heating in the TRAPPIST-1 Multiplanet System". Astrophysical Journal 857, nr 2 (25.04.2018): 142. http://dx.doi.org/10.3847/1538-4357/aab845.

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23

Couperthwaite, J. S., S. B. Mitchell, J. R. West i D. M. Lawler. "Cohesive Sediment Dynamics on an Inter-tidal Bank on the Tidal Trent, UK". Marine Pollution Bulletin 37, nr 3-7 (marzec 1999): 144–54. http://dx.doi.org/10.1016/s0025-326x(98)00175-1.

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24

Wu, Yao, Yong He, Chen Lu, Wei Zhang i Shiyou Gao. "Feedback between channel resilience and tidal dynamics in an intensively dredged tidal river". Journal of Hydrology 590 (listopad 2020): 125367. http://dx.doi.org/10.1016/j.jhydrol.2020.125367.

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25

Zhang, Jiyun, Dehai Song, Wen Wu i Xianwen Bao. "Impacts of human activities on tidal dynamics in a sexta-diurnal tidal resonant bay". Anthropocene Coasts 2, nr 1 (1.01.2019): 126–44. http://dx.doi.org/10.1139/anc-2018-0011.

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Using numerical modelling, we study changes in tidal dynamics in Daya Bay (DYB) between 1989 and 2014. During this period, a total water area of 30 km2 was reclaimed and the average water depth increased by 38 cm. As DYB is a sexta-diurnal tidal resonant bay, the sexta-diurnal tides respond differently to the coastline and bathymetry changes than other tides. Taking K1, M2, M4, and M6 as examples, model results show a decrease in tidal elevation amplitude, tidal current magnitude, and tidal energy flux for K1, M2, and M4 tides. For the M6 tide, however, the model predicted an increase in tidal elevation amplitude, tidal current magnitude in some parts of the bay, and the tidal energy flowing into the bay. Land reclamation leads to the enhancement of sexta-diurnal tidal resonance and thus the magnitude of the M6 tide. Furthermore, due to the magnification of M6, tidal duration asymmetry in DYB changed from ebb-dominance to flood-dominance, and water exchange became much more active. Therefore, owing to the sexta-diurnal tidal resonance, the impact of human activities on tidal dynamics in DYB is different from that in previously reported semi-enclosed bays where large-scale land reclamation has been carried out.
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26

Mohan, Manil T. "Dynamic programming and feedback analysis of the two dimensional tidal dynamics system". ESAIM: Control, Optimisation and Calculus of Variations 26 (2020): 109. http://dx.doi.org/10.1051/cocv/2020025.

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In this work, we consider the controlled two dimensional tidal dynamics equations in bounded domains. A distributed optimal control problem is formulated as the minimization of a suitable cost functional subject to the controlled 2D tidal dynamics equations. The existence of an optimal control is shown and the dynamic programming method for the optimal control of 2D tidal dynamics system is also described. We show that the feedback control can be obtained from the solution of an infinite dimensional Hamilton-Jacobi equation. The non-differentiability and lack of smoothness of the value function forced us to use the method of viscosity solutions to obtain a solution of the infinite dimensional Hamilton-Jacobi equation. The Bellman principle of optimality for the value function is also obtained. We show that a viscosity solution to the Hamilton-Jacobi equation can be used to derive the Pontryagin maximum principle, which give us the first order necessary conditions of optimality. Finally, we characterize the optimal control using the adjoint variable.
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27

Gusti, Gillang Noor Nugrahaning, Kiyosi Kawanisi, Mohamad Basel Al Sawaf i Faruq Khadami. "Subtidal Dynamics in a Tidal River with Limited Discharge". Water 14, nr 16 (22.08.2022): 2585. http://dx.doi.org/10.3390/w14162585.

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Investigating subtidal friction and mass transport is pivotal for examining subtidal dynamics in tidal rivers. Although the behavior of subtidal friction and transport has been discussed in recent years, most studies have been conducted on tidal rivers that are affected by high amounts of river runoff. The aim of this study is to offer an initial understanding of the spatial and temporal behaviors of subtidal friction and subtidal flux in a tidal river channel with limited river runoff. This study utilized the frequency domain and theoretical decomposition analyses to determine the dominant tidal and subtidal mechanisms. Frequency domain analysis indicated the dominance of semidiurnal and diurnal tides in the observed tidal river channel. The rate of energy transfer owing to shallow water interaction was found to be stronger for the current velocity than for the water elevation. Decomposition analysis showed that subtidal friction and flux in a low-discharge tidal river channel were largely influenced by subtidal flow-induced subtidal friction and Eulerian return flux, respectively. The key findings of this study are as follows: (i) the limited amount of river runoff (4–20 m3/s) leads to the vertical variability of subtidal friction contributions from subtidal flow and subtidal-tidal interaction, as well as Eulerian return flux, and (ii) the vertical variability of the aforementioned terms can be associated with the existence of influential longitudinal subtidal density gradients along the tidal river. We believe that these findings advance our understanding of subtidal dynamics in tidal river systems, particularly those with limited discharge.
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28

Muylaert, Koenraad, Jeroen van Wichelen, Koen Sabbe i Wim Vyverman. "Effects of freshets on phytoplankton dynamics in a freshwater tidal estuary (Schelde, Belgium)". Fundamental and Applied Limnology 150, nr 2 (11.01.2001): 269–88. http://dx.doi.org/10.1127/archiv-hydrobiol/150/2001/269.

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29

Bilal, Ahmed, Qiancheng Xie i Yanyan Zhai. "Flow, Sediment, and Morpho-Dynamics of River Confluence in Tidal and Non-Tidal Environments". Journal of Marine Science and Engineering 8, nr 8 (7.08.2020): 591. http://dx.doi.org/10.3390/jmse8080591.

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River confluences are the key features of the drainage basins, as their hydrological, geomorphological, and ecological nature strongly influences the downstream river characteristics. The river reaches near the coastal zones, which also makes them under the influence of tidal currents in addition to their runoff. This causes a bi-directional flow and makes the study of confluences more interesting and complex in these areas. There is a reciprocal adjustment of flow, sediment, and morphology at a confluence, and its behaviors, differ greatly in tidal and non-tidal environments. Existing studies of the river junctions provide a good account of information about the hydrodynamics and bed morphology of the confluent areas, especially the unidirectional ones. The main factors which affect the flow field include the angle of confluence, flow-related ratios (velocity, discharge, and momentum) of the merging streams, and bed discordance. Hydraulically, six notable zones are identified for unidirectional confluences. However, for bi-directional (tidal) junctions, hydrodynamic zones always remain in transition but repeat in a cycle and make four different arrangements of flow features. This study discusses the hydrodynamics, sediment transport, morphological changes, and the factors affecting these processes and reviews the recent research about the confluences for these issues. All of these studies provide insights into the morpho-dynamics in tidal and non-tidal confluent areas.
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30

Li, Li, Yihan Ren, Xiao Hua Wang i Yuezhang Xia. "Sediment dynamics on a tidal flat in macro-tidal Hangzhou Bay during Typhoon Mitag". Continental Shelf Research 237 (marzec 2022): 104684. http://dx.doi.org/10.1016/j.csr.2022.104684.

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Zhang, Yao, Xiao Hong, Ting Qiu, Xunan Liu, Yuxi Sun i Guodong Xu. "Tidal and wave modulation of rip current dynamics". Continental Shelf Research 243 (lipiec 2022): 104764. http://dx.doi.org/10.1016/j.csr.2022.104764.

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32

Chicone, C., i B. Mashhoon. "Tidal dynamics of relativistic flows near black holes". Annalen der Physik 517, nr 5 (2.03.2005): 290–308. http://dx.doi.org/10.1002/andp.20055170502.

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33

Elias, Edwin, Marcel Stive, Hans Bonekamp i Jelmer Cleveringa. "Tidal Inlet Dynamics in Response to Human Intervention". Coastal Engineering Journal 45, nr 4 (grudzień 2003): 629–58. http://dx.doi.org/10.1142/s0578563403000932.

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34

Nielsen, Peter. "Tidal dynamics of the water table in beaches". Water Resources Research 26, nr 9 (wrzesień 1990): 2127–34. http://dx.doi.org/10.1029/wr026i009p02127.

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35

Choi, Jun-Hwan, Martin D. Weinberg i Neal Katz. "The dynamics of tidal tails from massive satellites". Monthly Notices of the Royal Astronomical Society 381, nr 3 (10.10.2007): 987–1000. http://dx.doi.org/10.1111/j.1365-2966.2007.12313.x.

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36

Mageshwaran, T., i A. Mangalam. "Accretion and wind dynamics in tidal disruption events". Proceedings of the International Astronomical Union 12, S324 (wrzesień 2016): 134–35. http://dx.doi.org/10.1017/s1743921317002228.

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AbstractWe have constructed self similar models of time dependent and non relativistic accretion disks in both sub and super-Eddington phase of TDEs with wind outflows for a general viscosity prescription which is a function of surface density of the disk Σd and radius r. The physical parameters are black hole (BH) mass M•, specific orbital energy E and angular momentum J, star mass M⋆ and radius R⋆. We have considered an accretion disk where matter is lost due to accretion by black hole and out flowing wind (in case of super-Eddington) and added through fallback of the disrupted debris. We have simulated the light curve profiles in various spectral bands and fit them to the observations to determine the above mentioned physical parameters.
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37

Seliskar, Denise M., i John L. Gallagher. "Tidal creek surface film structural and metabolic dynamics". Estuaries 28, nr 3 (czerwiec 2005): 353–63. http://dx.doi.org/10.1007/bf02693918.

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38

Wan, Di, Jody M. Klymak, Michael G. G. Foreman i Stephen F. Cross. "Barotropic tidal dynamics in a frictional subsidiary channel". Continental Shelf Research 105 (sierpień 2015): 101–11. http://dx.doi.org/10.1016/j.csr.2015.05.011.

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39

Tenorio-Fernandez, L., J. Gomez-Valdes, I. Marino-Tapia, C. Enriquez, A. Valle-Levinson i S. M. Parra. "Tidal dynamics in a frictionally dominated tropical lagoon". Continental Shelf Research 114 (luty 2016): 16–28. http://dx.doi.org/10.1016/j.csr.2015.12.008.

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40

Leck, Mary A., i Robert L. Simpson. "Tidal freshwater wetland zonation: seed and seedling dynamics". Aquatic Botany 47, nr 1 (styczeń 1994): 61–75. http://dx.doi.org/10.1016/0304-3770(94)90049-3.

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41

Burša, M., E. Groten i Z. Šíma. "Coriolis’ force in the earth’s solid tidal dynamics". Studia Geophysica et Geodaetica 50, nr 2 (kwiecień 2006): 181–88. http://dx.doi.org/10.1007/s11200-006-0011-2.

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42

Ataie-Ashtiani, B., R. E. Volker i D. A. Lockington. "Tidal effects on groundwater dynamics in unconfined aquifers". Hydrological Processes 15, nr 4 (2001): 655–69. http://dx.doi.org/10.1002/hyp.183.

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de Swart, Huib E., i Bing Yuan. "Dynamics of offshore tidal sand ridges, a review". Environmental Fluid Mechanics 19, nr 5 (19.09.2018): 1047–71. http://dx.doi.org/10.1007/s10652-018-9630-8.

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Tonini, Mariano H., i Elbio D. Palma. "Tidal dynamics on the North Patagonian Argentinean Gulfs". Estuarine, Coastal and Shelf Science 189 (kwiecień 2017): 115–30. http://dx.doi.org/10.1016/j.ecss.2017.02.026.

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Doré, Arnaud, Philippe Bonneton, Vincent Marieu i Thierry Garlan. "Observation and numerical modeling of tidal dune dynamics". Ocean Dynamics 68, nr 4-5 (23.03.2018): 589–602. http://dx.doi.org/10.1007/s10236-018-1141-0.

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Lynch, Daniel R., Francisco E. Werner, Jean Marc Molines i Marianela Fornerino. "Tidal dynamics in a coupled ocean/lake system". Estuarine, Coastal and Shelf Science 31, nr 3 (wrzesień 1990): 319–43. http://dx.doi.org/10.1016/0272-7714(90)90107-3.

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Chicone, C., i B. Mashhoon. "Tidal dynamics of relativistic flows near black holes". Annalen der Physik 14, nr 5 (2.05.2005): 290–308. http://dx.doi.org/10.1002/andp.200410126.

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Becker, CC, L. Weber, JJ Suca, JK Llopiz, TA Mooney i A. Apprill. "Microbial and nutrient dynamics in mangrove, reef, and seagrass waters over tidal and diurnal time scales". Aquatic Microbial Ecology 85 (8.10.2020): 101–19. http://dx.doi.org/10.3354/ame01944.

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In coral reefs and adjacent seagrass meadow and mangrove environments, short temporal scales (i.e. tidal, diurnal) may have important influences on ecosystem processes and community structure, but these scales are rarely investigated. This study examines how tidal and diurnal forcings influence pelagic microorganisms and nutrient dynamics in 3 important and adjacent coastal biomes: mangroves, coral reefs, and seagrass meadows. We sampled for microbial (Bacteria and Archaea) community composition, cell abundances and environmental parameters at 9 coastal sites on St. John, US Virgin Islands that spanned 4 km in distance (4 coral reefs, 2 seagrass meadows and 3 mangrove locations within 2 larger bays). Eight samplings occurred over a 48 h period, capturing day and night microbial dynamics over 2 tidal cycles. The seagrass and reef biomes exhibited relatively consistent environmental conditions and microbial community structure but were dominated by shifts in picocyanobacterial abundances that were most likely attributed to diel dynamics. In contrast, mangrove ecosystems exhibited substantial daily shifts in environmental parameters, heterotrophic cell abundances and microbial community structure that were consistent with the tidal cycle. Differential abundance analysis of mangrove-associated microorganisms revealed enrichment of pelagic oligotrophic taxa during high tide and enrichment of putative sediment-associated microbes during low tide. Our study underpins the importance of tidal and diurnal time scales in structuring coastal microbial and nutrient dynamics, with diel and tidal cycles contributing to a highly dynamic microbial environment in mangroves, and time of day likely contributing to microbial dynamics in seagrass and reef biomes.
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Xu, Kehui, P. Ansley Wren i Yanxia Ma. "Tidal and Storm Impacts on Hydrodynamics and Sediment Dynamics in an Energetic Ebb Tidal Delta". Journal of Marine Science and Engineering 8, nr 10 (19.10.2020): 810. http://dx.doi.org/10.3390/jmse8100810.

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Bottom-mounted instrumentation was deployed at two sites on a large sandy shoal of an ebb tidal delta offshore of the Port Royal Sound of South Carolina of USA to collect hydrodynamics and sediment dynamics data. One site (“borrow site”) was 2 km offshore in a dredge pit for nearby beach nourishment and the other site (“reference site”) was 10 km offshore. In situ time-series data were collected during two periods after the dredging: 15 March–12 June (spring) and 18 August–18 November (fall) of 2012. Data at the reference site indicated active migrating bedforms from centimeters to decimeters tall, and sediment concentrations were highly associated with semidiurnal and fortnightly tidal cycles. In the fall deployment, waves at the reference site were higher than those at the shallow borrow site. Both Tropical Storm Beryl and Hurricane Sandy formed high waves and strong currents but did not generate the greatest sediment fluxes. The two sites were at different depths and distances offshore, and waves contributed more to sediment mobility at the reference site whereas tidal forcing was the key controlling factor at the borrow site. This study provides valuable datasets for the selection of sites, prediction of pit infilling, and the modeling of storm impact in future beach nourishment and coastal restoration projects.
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Park, Jinsoon, Bong-Oh Kwon, Minkyu Kim, Seongjin Hong, Jongseong Ryu, Sung Joon Song i Jong Seong Khim. "Microphytobenthos of Korean tidal flats: A review and analysis on floral distribution and tidal dynamics". Ocean & Coastal Management 102 (grudzień 2014): 471–82. http://dx.doi.org/10.1016/j.ocecoaman.2014.07.007.

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