Acoustic effects caused by high-intensity internal waves in a shelf zone

2001 ◽  
Vol 47 (4) ◽  
pp. 424-429 ◽  
Author(s):  
B. G. Katsnel’son ◽  
S. A. Pereselkov ◽  
V. G. Petnikov ◽  
K. D. Sabinin ◽  
A. N. Serebryanyi
Keyword(s):  
Internal Waves ◽  
High Intensity ◽  
Shelf Zone

scholarly journals Mass and momentum transfer by solitary internal waves in a shelf zone

2012 ◽  
Vol 19 (2) ◽  
pp. 265-272 ◽  
Author(s):  
N. Gavrilov ◽  
V. Liapidevskii ◽  
K. Gavrilova
Keyword(s):  
Mathematical Model ◽  
Internal Waves ◽  
Solitary Waves ◽  
Large Amplitude ◽  
Shelf Zone ◽  
Swash Zone ◽  
Second Mode ◽  
Before And After ◽  
The Mathematical Model ◽  
Solitary Internal Waves

Abstract. The evolution of large amplitude internal waves propagating towards the shore and more specifically the run up phase over the "swash" zone is considered. The mathematical model describing the generation, interaction, and decaying of solitary internal waves of the second mode in the interlayer is proposed. The exact solution specifying the shape of solitary waves symmetric with respect to the unperturbed interface is constructed. It is shown that, taking into account the friction on interfaces in the mathematical model, it is possible to describe adequately the change in the phase and amplitude characteristics of two solitary waves moving towards each other before and after their interaction. It is demonstrated that propagation of large amplitude solitary internal waves of depression over a shelf could be simulated in laboratory experiments by internal symmetric solitary waves of the second mode.

ON COASTAL - OPEN SEA DYNAMIC INTERACTIONS DEFINING PRODUCTIVITY AND ECOLOGY OF SHELF AND ADJACENT TO SHELF WATERS

2017 ◽  
Author(s):  
Vadim Navrotsky ◽  
Vadim Navrotsky
Keyword(s):  
Boundary Layers ◽  
Internal Waves ◽  
Stratified Medium ◽  
Shelf Zone ◽  
Small Scale ◽  
The Sea Of Japan ◽  
Bottom Boundary ◽  
Open Sea ◽  
Bottom Boundary Layers ◽  
Near Shore

It is known that considerable part of living matter in the ocean falls out of biological cycle irretrievably by way of sedimentation. It means that quasi-stationary state of oceanic ecosystems is possible only with supply of mineral and organic matter from land. That supply, which includes also contaminating matter, takes place mainly in near-shore regions, concentrates in bottom boundary layers, and is transferred to the open sea via shelves by means of horizontal and vertical mixing. Effective mixing in shelves is carried out by small-scale processes, which are considerably fed by energy of large-scale processes from out-of-shelf regions. The main objective of our paper is to identify mechanisms of energy transfer from large to small-scale motions and from open sea to near-shore areas. Our experiments and observations in the shelf zone of the Sea of Japan revealed important specific features in stratified bottom boundary layers: 1) Temporal intermittence of internal waves (IW) in near-bottom layers and their transformation into sequences of stratified boluses moving in non-stratified medium. 2) Extremely high horizontal and vertical velocities in the near-bottom layers. 3) Considerable power fluctuations caused by correlated fluctuations of near-bottom pressure and velocity. 4) Non-monotonic vertical structure of temperature and velocity leading to possibility of simultaneous existing of IW breaking and secondary generation of high-frequency IW by turbulence in layers with high curvature of velocity profiles. Taking into account satellite observations of high correlation between chlorophyll-a concentration in coastal and in out-of-shelf waters, as well as dispersion relations for different types of internal waves and results of our field experiments we suggest that interconnection of biological parameters in coastal and in open sea waters is exercised substantially by gravitational and inertial internal waves generated by tides and eddies in the region of continental slope near the shelf boundary.

scholarly journals TRANSFORMATIONS AND EFFECTS OF INTERNAL WAVES IN THE NEARSHORE REGION OF SEA

2019 ◽  
Vol 47 (2) ◽  
pp. 230-245
Author(s):  
V. V. Navrotsky ◽  
V. Yu. Liapidevskii ◽  
E. P. Pavlova ◽  
F. F. Khrapchenkov
Keyword(s):  
Internal Waves ◽  
Current Velocity ◽  
Field Experiments ◽  
Biological Effects ◽  
Surrounding Medium ◽  
Peter The Great Bay ◽  
Bottom Layer ◽  
Point Of View ◽  
Shelf Zone ◽  
Near Shore

Analysis of results of field experiments in the near-shore region of the Peter the Great Bay (the Sea pf Japan) is made from the point of view of internal waves (IW) influence on biological and geomorphologic processes in the shelf zone of sea. The main measured parameters were fluctuations of temperature, pressure and current velocity in the near-bottom layer in the near-shore region with bottom depth of 20–30 m. Fluctuations of temperature were measured with the help of anchored strings of 20–30 thermistors with 0.5 m interval, fluctuations of current velocity were measured at 10–15 levels with 1–3 m intervals. The typical for shoreward propagated IW was their nonlinear transformation with formation of stable discreet boluses - water volumes with cold cores, separated from surrounding medium by high-gradient layers. Propagating into shallow regions, IW stimulate mixing, bottom sediments resuspension and near-shore region ventilation. The boluses can propagate farther into shallow regions where continuous picnocline is absent, supplementing effects of IW and amplifying them. It is shown that biological effects of IW and boluses are caused by their considerable impact on the main parameters defining primary production of phytoplankton: biogens concentration, illumination, and fluctuations of temperature.

Nonlinear Internal Waves in the Shelf Zone of the Sea

2019 ◽  
Vol 54 (3) ◽  
pp. 329-338 ◽  
Author(s):  
V. F. Kukarin ◽  
V. Yu. Liapidevskii ◽  
F. F. Khrapchenkov ◽  
I. O. Yaroshchuk
Keyword(s):  
Internal Waves ◽  
Shelf Zone ◽  
Nonlinear Internal Waves

Study of intensive internal waves in the shelf zone of Morocco

1996 ◽  
Vol 7 (4) ◽  
pp. 281-298 ◽  
Author(s):  
V. I. Vlasenko ◽  
V. A. Ivanov ◽  
I. G. Krasin ◽  
A. D. Lisichenok
Keyword(s):  
Internal Waves ◽  
Shelf Zone

ON COASTAL - OPEN SEA DYNAMIC INTERACTIONS DEFINING PRODUCTIVITY AND ECOLOGY OF SHELF AND ADJACENT TO SHELF WATERS

2017 ◽  
Author(s):  
Vadim Navrotsky ◽  
Vadim Navrotsky
Keyword(s):  
Boundary Layers ◽  
Internal Waves ◽  
Stratified Medium ◽  
Shelf Zone ◽  
Small Scale ◽  
The Sea Of Japan ◽  
Bottom Boundary ◽  
Open Sea ◽  
Bottom Boundary Layers ◽  
Near Shore

It is known that considerable part of living matter in the ocean falls out of biological cycle irretrievably by way of sedimentation. It means that quasi-stationary state of oceanic ecosystems is possible only with supply of mineral and organic matter from land. That supply, which includes also contaminating matter, takes place mainly in near-shore regions, concentrates in bottom boundary layers, and is transferred to the open sea via shelves by means of horizontal and vertical mixing. Effective mixing in shelves is carried out by small-scale processes, which are considerably fed by energy of large-scale processes from out-of-shelf regions. The main objective of our paper is to identify mechanisms of energy transfer from large to small-scale motions and from open sea to near-shore areas. Our experiments and observations in the shelf zone of the Sea of Japan revealed important specific features in stratified bottom boundary layers: 1) Temporal intermittence of internal waves (IW) in near-bottom layers and their transformation into sequences of stratified boluses moving in non-stratified medium. 2) Extremely high horizontal and vertical velocities in the near-bottom layers. 3) Considerable power fluctuations caused by correlated fluctuations of near-bottom pressure and velocity. 4) Non-monotonic vertical structure of temperature and velocity leading to possibility of simultaneous existing of IW breaking and secondary generation of high-frequency IW by turbulence in layers with high curvature of velocity profiles. Taking into account satellite observations of high correlation between chlorophyll-a concentration in coastal and in out-of-shelf waters, as well as dispersion relations for different types of internal waves and results of our field experiments we suggest that interconnection of biological parameters in coastal and in open sea waters is exercised substantially by gravitational and inertial internal waves generated by tides and eddies in the region of continental slope near the shelf boundary.

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