scholarly journals The Characteristics of Internal Waves in the Sea of Japan

1998 ◽  
Vol 14 ◽  
pp. 5-9
Author(s):  
Masabumi Seto ◽  
Shinya Otake ◽  
Zyuichi Okuno ◽  
Makoto Nakamura
Keyword(s):  
Internal Waves ◽  
Sea Of Japan ◽  
The Sea Of Japan

scholarly journals Probabilistic Characteristics of Intensive Short-Period Internal Waves in the Sea of Japan

2020 ◽  
Vol 27 (5) ◽  
Author(s):  
M. V. Kokoulina ◽  
O. E. Kurkina ◽  
E. A. Rouvinskaya ◽  
A. A. Kurkin ◽  
◽  
...  
Keyword(s):  
Internal Waves ◽  
Sea Of Japan ◽  
Peter The Great Bay ◽  
Statistical Characteristics ◽  
The Sea Of Japan ◽  
Peter The Great ◽  
Short Period ◽  
Wave Heights ◽  
Log Normal ◽  
Log Normal Distribution

Purpose. The paper is aimed at studying the regional features of the internal waves’ field in the Sea of Japan (the Peter the Great Bay) based on the field data, namely, determination of the internal waves’ statistical characteristics that can be used to predict possibility of generating the waves of extreme amplitudes. Methods and Results. The records of water temperature variability in the Peter the Great Bay (the depth at the point of measurements is 42 m) obtained for October 11 – 20, 2011 were used as the initial data. Sampling frequency of the records was 1 s that permitted to analyze the shape of the short-period internal waves. The data on the salinity vertical distribution near the measurement point was also used. The law of the power density spectrum decay (as applied to the studied record) is well described by the Garrett – Munk model for the Sea of Japan zone being under consideration. The calculated temporal series of density were applied for obtaining the basic statistical characteristics including the statistical moments. Besides, empirical distribution for such parameters as the wave heights, periods and steepness and the wave slope amplitude was approximated by the log-normal distribution law and analyzed. The expected wave heights were forecasted using the Poisson statistics. Conclusions. It is shown that the probabilistic characteristics of the internal waves are described well by the log-normal distribution. Based on repeatability of the internal waves’ heights, probability of appearance of intensive disturbances is estimated. It is shown that within 10 days, occurrence of a short-period wave with the height not less than 7 m is guaranteed at the observation point at the 42 m depth. Keywords intensive internal waves, in situ data, probabilistic characteristics of extreme waves, shelf, Sea of Japan.

Observations of internal waves and thermocline splitting near a shelf break of the Sea of Japan (East Sea)

2004 ◽  
Vol 24 (12) ◽  
pp. 1375-1395 ◽  
Author(s):  
V.V Navrotsky ◽  
I.D Lozovatsky ◽  
E.P Pavlova ◽  
H.J.S Fernando
Keyword(s):  
Internal Waves ◽  
Sea Of Japan ◽  
Shelf Break ◽  
East Sea ◽  
The Sea Of Japan

On intense internal waves in the coastal zone of the Peter the Great Bay (the Sea of Japan)

2016 ◽  
Vol 41 (9) ◽  
pp. 629-634 ◽  
Author(s):  
I. O. Yaroshchuk ◽  
A. P. Leont’ev ◽  
A. V. Kosheleva ◽  
A. A. Pivovarov ◽  
A. N. Samchenko ◽  
...  
Keyword(s):  
Internal Waves ◽  
Coastal Zone ◽  
Sea Of Japan ◽  
Peter The Great Bay ◽  
The Sea Of Japan ◽  
Peter The Great ◽  
Great Bay

scholarly journals A USE OF HYDROPHISICAL RESEARCH COMPLEX IN FULL-SCALE EXPERIMENTS ON THE SHELF OF THE SEA OF JAPAN

2020 ◽  
Author(s):  
А.А. Пивоваров ◽  
А.Н. Самченко ◽  
А.Н. Швырев ◽  
И.О. Ярощук
Keyword(s):  
Phase Shift ◽  
Internal Waves ◽  
Sea Of Japan ◽  
Peter The Great Bay ◽  
Full Scale ◽  
Propagation Path ◽  
The Sea Of Japan ◽  
Aquatic Area ◽  
Linear Frequency ◽  
Research Complex

Осенью 2019 года на шельфе Японского моря в заливе Петра Великого проводился комплексный натурный эксперимент с целью изучения влияния внутренних волн на распространение сложных низкочастотных сигналов. Экспериментальные работы проводились с помощью нового гидрофизического исследовательского комплекса. В состав комплекса входили: вертикальная 8-элементная приемная антенна, автономная широкополосная излучающая станция, многоэлементные термогирлянды и регистраторы гидростатического давления. В течение суток проводились излучение и прием пакетов различных ЛЧМ и фазоманипулированных сигналов с одновременным измерением характеристик поля внутренних волн по трассе распространения. В ходе выполнения натурного эксперимента были подтверждены технические характеристики гидрофизического исследовательского комплекса и получен опыт проведения комплексных океанологических экспериментов. Выявлены различия в использовании линейных частотно модулированных и псевдослучайных фазоманипулированных сигналов, показано характерное на данной акватории, влияние гидрологических возмущений на распространение акустических сигналов. Осенью 2019 года на шельфе Японского моря в заливе Петра Великого проводилось экспериментальное тестирование гидрофизического исследовательского комплекса. Изучалось влияния внутренних волн на распространение сложных низкочастотных сигналов. В ходе выполнения натурного эксперимента были подтверждены технические характеристики гидрофизического исследовательского комплекса. Выявлены различия в использовании линейных частотно-модулированных и псевдослучайных фазоманипулированных сигналов, показано характерное на данной акватории влияние гидрологических возмущений на распространение акустических сигналов. Fall 2019, a full-scale integrated experiment took place on the shelf of the Sea of Japan in Peter the Great Bay. It was aimed at studying the influence of internal waves on the propagation of complex low-frequency signals. Experimental works were performed using novel hydrophysical research complex. It consists of the vertical 8-element receiving antenna, autonomous wideband transmitting station, multi-element thermo-strings, and hydrostatic pressure recorder. Within 24 hours, packets of different signals with linear frequency modulation and phase-shift keying were emitted and recorded with simultaneous measurements of characteristics of the internal waves field along the propagation path. During experiments, the technical parameters of the hydrophysical research complex were verified, and some experience of performing integrated oceanological experiments were obtained. Differences in the usage of linear frequency modulated and phase-shift keyed signals were found. The influence of hydrological interference on underwater acoustic signals propagation typical for the aquatic area was demonstrated.

scholarly journals Probabilistic Characteristics of Intensive Short-Period Internal Waves in the Sea of Japan

2020 ◽  
Vol 36 (5) ◽  
Author(s):  
M. V. Kokoulina ◽  
O. E. Kurkina ◽  
E. A. Rouvinskaya ◽  
A. A. Kurkin ◽  
◽  
...  
Keyword(s):  
Internal Waves ◽  
Sea Of Japan ◽  
Peter The Great Bay ◽  
Statistical Characteristics ◽  
The Sea Of Japan ◽  
Peter The Great ◽  
Short Period ◽  
Wave Heights ◽  
Log Normal ◽  
Log Normal Distribution

Purpose: The paper is aimed at studying the regional features of the internal waves’ field in the Sea of Japan (the Peter the Great Bay) based on the field data, namely, determination of the internal waves’ statistical characteristics which can be used to predict possibility of generating the waves of extreme amplitudes. Methods and Results: The records of water temperature variability in the Peter the Great Bay (the depth at the point of measurements is 42 m) obtained for October 11 – October 20, 2011 were used as the initial data. Sampling frequency of the records was 1 s that permitted to analyze the shape of the short-period internal waves. Also the data on the salinity vertical distribution near the measurement point were used. The law of the power density spectrum decay (as applied to the studied record) is well described by the Garrett – Munk model for the Sea of Japan zone under investigation. The calculated temporal series of density were applied for obtaining the basic statistical characteristics including the statistical moments. Besides, empirical distribution for such parameters as the wave heights, periods and steepness, and the wave slope amplitude was approximated by the log-normal distribution law and analyzed. The expected wave heights were forecasted using the Poisson statistics. Conclusions: It is shown that the probabilistic characteristics of the internal waves are described well by the log-normal distribution. Based on repeatability of the internal waves’ heights, probability of appearance of intensive disturbances is estimated. It is shown that within 10 days, occurence of a short-period wave with the height not less than 7 m is guaranteed at the observation point at the 42 m depth

Characteristics of Upward Leaders of Winter Lightning in the Coastal Area of the Sea of Japan

2012 ◽  
Vol 132 (6) ◽  
pp. 560-567 ◽  
Author(s):  
Megumu Miki ◽  
Toru Miki ◽  
Akira Asakawa ◽  
Takatoshi Shindo ◽  
Shigeru Yokoyama
Keyword(s):  
Sea Of Japan ◽  
Coastal Area ◽  
The Sea Of Japan

Characteristics of Winter Lightning Threatening Wind Turbines in Coastal Area of the Sea of Japan

2011 ◽  
Vol 131 (12) ◽  
pp. 973-978 ◽  
Author(s):  
Fumiyuki Fujii ◽  
Masaru Ishii ◽  
Mikihisa Saito ◽  
Michihiro Matsui ◽  
Daisuke Natsuno
Keyword(s):  
Sea Of Japan ◽  
Wind Turbines ◽  
Coastal Area ◽  
The Sea Of Japan
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