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1.
Coupled modeling of currents and wind waves in the Kerch Strait 总被引:1,自引:0,他引:1
We present a numerical model of the dynamics of the Kerch Strait allowing one to perform the coordinated analysis of the fields
of currents and wind waves. The model includes the spectral wave module and the hydrodynamic block of currents. The influence
of waves on the currents is taken into account in the hydrodynamic block both via the surface and bottom tangential stresses
and via the radiation stresses. In order to take into account the inverse influence of currents upon the waves, we use the
fields of currents and sea level from the hydrodynamic block in the wave module. The specific features of the structure of
currents and wind waves in the strait are studied for the typical wave situations. The results of the coupled and separate
simulation are compared and the importance of taking into account the mechanisms of interaction between waves and currents
in the analysis of the dynamic processes in the strait is demonstrated.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 3–20, September–October, 2007. 相似文献
2.
3.
Yu. V. Artamonov A. E. Bukatov N. M. Solovei E. A. Skripaleva 《Physical Oceanography》2005,15(4):203-210
By using the linear theory of internal waves in a continuously stratified ideal incompressible liquid of finite depth and
hydrological data, we study the dispersion properties and space structure of the vertical velocity of the first mode of free
internal waves in the Atlantic Ocean. The dependence of the characteristics of waves on the hydrological structure of waters
is analyzed.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 4, pp. 3–10, July–August, 2005. 相似文献
4.
S. F. Dotsenko 《Physical Oceanography》2005,15(3):133-141
Within the framework of a nonlinear model of long waves, we present the estimates of the parameters of tsunami waves along
the south coast of the Crimean Peninsula (from Cape Khersones to Cape Meganom) with a space resolution of 2.5 km. The numerical
analysis is carried out for four typical positions of the elliptic zones of generation and the range of magnitudes 6.5–7.5.
We study the space structure of waves and determine the amplitudes and periods of oscillations of the level at 11 points of
the analyzed part of the coastline of the Black Sea.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 3 – 10, May–June, 2005. 相似文献
5.
6.
We study trapped baroclinic topographic waves in the northwest shelf of the Black Sea for the actual slopes of the bottom
and stratification. The time scales of trapped waves are determined. The space scales of the amplitude of oscillations are
computed. It is shown that the vertical distribution of the amplitude of oscillations is in qualitative agreement with the
experimentally observed distribution. The energy of topographic waves trapped by the sloping bottom is concentrated in the
bottom layer, which agrees with the data of measurements.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 44–52, September–October, 2006. 相似文献
7.
E. L. Vinogradova P. N. Makkaveev Z. G. Melnikova Yu. R. Nalbandov P. A. Stunzhas P. V. Khlebopashev 《Oceanology》2011,51(5):796-803
The Volga River discharge consists of the waters transferred by fast currents through channels and the waters which are passing
through the shallow areas of the delta overgrown by cane. Using the hydrochemical data, it is possible to track distribution
of the waters modified by “biofilters” of macrophytes in the delta shallows starting from the external edge of the delta.
The main distinctive features of these waters are the high content of dissolved oxygen, the abnormally high values of the
pH, and the low content of dissolved inorganic carbon (both total and as CO2). These waters extend in the shape of 1 to 3-km-wide strips at a distance of 20–40 km from the outer border of the delta.
The analysis of the data obtained during the expeditions run by the Institute of Oceanology of the Russian Academy of Sciences
in 2003–2009, along with archived and published data, show that such “modified” waters occur almost constantly along the outer
edge of the Volga River delta. 相似文献
8.
The mechanisms of initiation and interaction of wind-induced solitary waves in a circular aerohydrochannel are experimentally
investigated. We study the influence of flotation (floating mass) and surface-active substances on the time of formation of
a soliton and its parameters. It is shown that the increase in the concentration of surface-active substances and the amount
of flotation leads to an increase in the time of initiation wind-induced solitary wave. It is shown that, in the case of small
difference between the amplitudes of the interacting solitons, they behave as particles. In the case where the difference
between the amplitudes is significant, the larger soliton passes through the smaller, which leads to the formation of a single
soliton as a result of multiple interaction between the original solitons.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 53–61, September–October, 2006. 相似文献
9.
V. A. Dubinina A. A. Kurkin E. N. Pelinovsky O. E. Poloukhina 《Izvestiya Atmospheric and Oceanic Physics》2006,42(2):254-261
Nonlinear three-wave interactions of Stokes edge waves propagating both in one direction and in opposite directions along a uniformly sloping shelf are considered. In the cases when only the lowest four modes participate in interaction, the synchronism conditions are determined and interaction coefficients are calculated. It is shown that the interaction coefficients of unidirectional edge-wave modes can vanish for certain triads. The spatiotemporal dynamics of a triad of edge waves is investigated. In addition, expressions are given for the resonance interaction coefficients of edge waves over the bottom of an arbitrary profile. 相似文献
10.
S. F. Dotsenko 《Physical Oceanography》2006,16(2):77-88
Within the framework of a linear model of long waves in a two-layer ocean, we obtain the analytic solution of the problem
of evolution of an axially symmetric initial displacement of the jump of density. In the process of adaptation of the fields,
internal waves in the form of a decaying (in time) wave packet are emitted from the zone of initial perturbation. These waves
are quasiinertial and their dispersion is conditioned by Earth’s rotation. We study the time evolution of the wave packet
and the dependence of its characteristics on the width of the zone of initial perturbation and the depth of the jump of density.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 12–23, March–April, 2006. 相似文献
11.
Longitudinal dispersion in wave-current-vegetation flow 总被引:1,自引:0,他引:1
S. Patil X. Li C. Li B. Y. F. Tam C. Y. Song Y. P. Chen Q. Zhang 《Physical Oceanography》2009,19(1):45-61
The flow, turbulence, and longitudinal dispersion in wave-current flow through submerged vegetation are experimentally examined.
Laboratory experiments are carried out by superimposing progressive waves on a steady flow through simulated submerged vegetation.
The resultant wave-current-vegetation interaction shows strong interface shear with increase in the velocity due to the wave-induced
drift. The increase in turbulence in the region of vegetation is found to be about twice higher than in the no-wave case due
to the additional mixing by wave motions. Solute experiments are conducted to quantify the wave-current-vegetation longitudinal
dispersion coefficient (WCVLDC) by the routing method and by defining length and velocity scales for the wave-current-vegetation
flow. An empirical expression for the WCVLDC is proposed. Although the increase in vertical diffusivity is observed as compared
with bare-bed channels, the shear effect is stronger, which increases the value of the WCVLDC. The study can be a guideline
to understand the combined hydrodynamics of waves, current, and vegetation and quantify the longitudinal dispersion therein.
Published in Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 50–67, January–February, 2009. 相似文献
12.
On the basis of processing of the oceanographic data accumulated for the water area of the North Atlantic in 1950–1999 (∼500,000
stations), we study seasonal and interannual variations of the principal characteristics of pycnocline within the range of
σt = 25.5–27.5 conventional density units. It is shown that the interannual oscillations of these characteristics in the entire
analyzed layer can be regarded as a superposition of fluctuations with periods from 2–3 to 10–12 yr. The typical ranges of
these fluctuations for the depths of occurrence of isopycnic surfaces and the corresponding temperature and salinity are equal
to 20–25 m, 1–1.5°C, and 0.25‰, respectively. The intensification of atmospheric circulation at middle latitudes is accompanied
by the simultaneous deepening of the pycnocline and its heating in the central part of the North Subtropical Anticyclonic
Gyre. At the same time, the process of weakening of the atmospheric circulation leads to the rise of the pycnocline and its
cooling. The complete cycle of interaction of the North-Atlantic Oscillation with the anomalies of isopycnic characteristics
(with regard for the period of their advection) is equal to ∼6–8 yr.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 29–48, March–April, 2007. 相似文献
13.
The process of development of nonlinear oscillations of the free surface of a fluid caused by the action of a periodic mass
force in a bounded basin is numerically studied within the framework of the theory of long waves. The action of dissipative
forces is taken into account. The effect of nonlinearity and geometric characteristics of the basin on the parameters of the
generated wave field is analyzed.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 3–12, September–October, 2005. 相似文献
14.
Within the framework of the linear theory of long waves, we study forced oscillation of liquid in a ring basin of variable
depth by using numerical methods. As a generator of waves, we use periodic (in time) variations of atmospheric pressure. The
action of the Coriolis force is taken into account. The liquid is regarded as homogeneous and inviscid. We analyze the dependences
of the structure of the free wave surface (the number and location of nodal lines) on the period and space distribution of
disturbing pressures.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 2, pp. 11–23, March–April, 2005. 相似文献
15.
Internal waves occurring in the specific Mid-Atlantic ridge area as a result of the impinging of a barotropic tide are studied
in the terms of the linear theory for surface waves. The ocean is assumed to be double-layered, with a tidal wave running
onto it at an arbitrary angle. The dependences of the wave amplitudes and horizontal velocities on the angle of run-on of
a tidal wave are derived. Similar studies for the model bottom topography have been reported in refs 1–3.
Translated by Vladimir A. Puchkin. 相似文献
16.
S. F. Dotsenko 《Physical Oceanography》2005,15(4):211-219
Within the framework of the nonlinear theory of long waves, we perform the numerical analysis of the one-dimensional run-up
of solitary tsunami waves upon a plane sloping coast. We study the dependences of the run-up heights on the parameters of
waves at the entrance of the shelf zone and on the slope of the coast. The run-up heights of tsunami waves are estimated for
the bottom topography typical of the south coast of the Crimean Peninsula.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 4, pp. 11–18, July–August, 2005. 相似文献
17.
由于折射作用,在波浪近岸传播过程中会出现一种特殊的、沿着岸线传播的波浪,这种波浪被称为边缘波。边缘波平行于岸线传播,其振幅在岸线处最大,在远离岸线的方向,其振幅呈指数型减小,它们的能量基本被限制在离海岸一波长的距离之内,因此边缘波对近岸地区工程、地貌等有着重要影响。本文对边缘波的研究历史、研究进展进行了阐述,主要介绍了以下几个方面:(1)基于不同控制方程、不同地形上的边缘波理论;(2)实际观测到的边缘波特性;(3)物理模型试验中边缘波的造波方式以及观测到的边缘波特性;(4)数值模拟方法在边缘波研究中的应用。最后,展望了边缘波在未来的研究趋势。 相似文献
18.
We perform the analysis of the time spectra of four tsunamis generated in the Black Sea by the earthquakes of 26.07.1927,
11.09.1927, 26.12.1939, and 12.07.1966. For the analysis of the spectra, we used digitized marigrams obtained for 12 points
of the Black-Sea coast. The obtained spectra are, as a rule, multimode and have 1–4 spectral maxima. One maximum corresponds
to the periods typical of tsunami waves and the other maxima correspond to the oscillations of the sea level with lower frequencies.
It seems likely that the events of tsunami are accompanied by low-frequency oscillations of the level caused by the atmospheric
forcing, seiches, or other factors. In numerous cases, the oscillations from the predominant energy range lie outside the
characteristic range of periods of the tsunami waves.
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 21–30, September–October, 2007. 相似文献
19.
The combined wave-current flow has been solved by researchers by assuming wave over either depthwise constant or linear current
profile. Some complicated nonlinear current profiles have also been considered to simulate various shear currents. We consider
a nonlinear current vertically logarithmic in nature and examine its interaction with a periodic surface wave. The Navier-Stokes
equations for incompressible flow are solved for the current part and by using periodic boundary conditions. The effect of
logarithmic current on wave components is assessed. The corresponding celerity and dispersion equation yields a close-form
solution for the shallow-wave approximation. Several comparative trends between wave-only, wave with log current, and wave
with constant current for the wave following/opposing these currents have been discussed. The flow properties of the first
order are presented which can be applicable to the real inland and coastal flows, where progressive waves are ubiquitous over
a depthwise logarithmic current. The work is further extended to the second-order semiempirical wave component by using past
experimental data on the wave spectrum of combined flow.
Published in Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 20–40, May–June, 2008. 相似文献