scholarly journals Cyclonic Process of the “Voice of the Sea” Microseism Generation and Its Remote Monitoring

2021 ◽  
Vol 13 (17) ◽  
pp. 3452
Author(s):  
Grigory I. Dolgikh ◽  
Vladimir A. Chupin ◽  
Egor S. Gusev ◽  
Galina A. Timoshina
Keyword(s):  
Experimental Data ◽  
Tropical Cyclones ◽  
Remote Monitoring ◽  
Surf Zone ◽  
Wind Waves ◽  
Water Area ◽  
The Sea Of Japan ◽  
Laser Strainmeter ◽  
Rear Part ◽  
The Voice

The article presents the results of microseismic signals of the “voice of the sea” registration by a two-coordinate laser strainmeter during the passage of typhoons through and near the water area of the Sea of Japan. It was established that the “voice of the sea” microseisms appear and disappear almost simultaneously with primary microseisms, i.e., the powerful “voice of the sea” microseisms exist only in the presence of powerful wind waves, generated by a passing typhoon. According to the processing results of the obtained experimental data, the “voice of the sea” microseisms generation area is located in the “sea-land” transition zone, i.e., near and/or in the surf zone. Based on the data of the two-coordinate laser strainmeter, we determined the bearing of the “voice of the sea” microseisms generation area. The movement of this area coincides with the movement of the rear part of tropical cyclones.

scholarly journals Climate Change Impacts on Wind Waves Generated by Major Tropical Cyclones off the Coast of New Jersey, USA

2021 ◽  
Vol 7 ◽  
Author(s):  
Reza Marsooli ◽  
Mohammad Jamous ◽  
Jon K. Miller
Keyword(s):  
New Jersey ◽  
Sea Level Rise ◽  
Sea Level ◽  
Tropical Cyclones ◽  
Surf Zone ◽  
Greenhouse Gas Emission ◽  
Wind Waves ◽  
Climate Conditions ◽  
Wave Heights ◽  
Hydrodynamic Wave

Coastal areas of State of New Jersey in the Northeastern United States are exposed to extreme wind waves generated by tropical cyclones in the Atlantic Ocean. Past studies suggest that the frequency and intensity of major hurricanes in the Atlantic basin would increase under high greenhouse gas emission scenarios. Furthermore, sea level observations have revealed that the local mean sea level along the coast of New Jersey is rising at a rate higher than that of the global sea level rise. The objective of this study is to quantify the combined influence of sea level rise (SLR) and hurricane climatology change on wave heights induced by major hurricanes off the coast of New Jersey. To this end, a coupled hydrodynamic-wave model is utilized to simulate wind waves for synthetic hurricanes generated for the climate conditions in the historical period of 1980–2000 and future period of 2080–2100 under the RCP8.5 high emission scenario. The synthetic storms are generated by a hurricane model for the climate conditions obtained from four different global climate models. The projections of future wave heights show statistically significant increases in the wave heights induced by major hurricanes. Under the combined effects of hurricane climatology change and a SLR of 1.19 m, the increase in the extreme wave heights 15% in back-bays and shallow waters of the nearshore zone and up to 10% in deeper coastal waters. It is found that SLR alone would result in a significant increase in the hurricane-induced wave heights in the present-day surf zone.

scholarly journals Видовое многообразие и территориальное распределение наземных позвоночных Tetrapoda (Vertebrata, Chordata) Приморского края

2020 ◽  
Author(s):  
Ю.Н. Глущенко ◽  
Э.И. Цунов
Keyword(s):  
Species Diversity ◽  
Sea Of Japan ◽  
Water Area ◽  
The Sea Of Japan ◽  
Primorsky Krai ◽  
Adjacent Water

В публикации дано видовое многообразие и территориальное распределение наземных позвоночных Tetrapoda (Vertebrata, Gnathostomata), известных для территории Приморского края и прилежащей акватории Японского моря. Ключевые слова: Приморский край, наземные позвоночные, Tetrapoda, видовое многообразие, распространение. The publication presents the species diversity and territorial distribution of superclass Tetrapoda (Vertebrata, Chordata), known for the territory of PrimorskyKrai and the adjacent water area of the Sea of Japan. Keywords: Primorsky Krai, Tetrapoda, species diversity, territorial distribution.

scholarly journals Method of Studying Modulation Effects of Wind and Swell Waves on Tidal and Seiche Oscillations

2021 ◽  
Vol 9 (9) ◽  
pp. 926
Author(s):  
Grigory Ivanovich Dolgikh ◽  
Sergey Sergeevich Budrin
Keyword(s):  
Experimental Data ◽  
Regression Analysis ◽  
Data Analysis ◽  
High Precision ◽  
Wind Waves ◽  
Laser Interference ◽  
Wave Processes ◽  
Interaction Of Waves ◽  
Seiche Oscillations ◽  
Lower Frequencies

This paper describes a method for identifying modulation effects caused by the interaction of waves with different frequencies based on regression analysis. We present examples of its application on experimental data obtained using high-precision laser interference instruments. Using this method, we illustrate and describe the nonlinearity of the change in the period of wind waves that are associated with wave processes of lower frequencies—12- and 24-h tides and seiches. Based on data analysis, we present several basic types of modulation that are characteristic of the interaction of wind and swell waves on seiche oscillations, with the help of which we can explain some peculiarities of change in the process spectrum of these waves.

scholarly journals Analysis of ecotoxicological condition of Amur bay (the sea of Japan) based on chemical and toxicological indicators

2019 ◽  
Vol 46 (3) ◽  
pp. 308-317
Author(s):  
S. A. Cherkashin ◽  
M. V. Simokon ◽  
T. S. Pryazhevskaya
Keyword(s):  
Survival Rate ◽  
Surface Water ◽  
Bottom Sediments ◽  
Biological Effects ◽  
Outer Part ◽  
Water Area ◽  
The Sea Of Japan ◽  
Amur Bay ◽  
Marine Crustaceans ◽  
Biological Tests

Data on the Cd, Cu, Pb, and Zn contents in the bottom sediments of Amur Bay are presented. Contamination of bottom sediments is particularly heavy near the central part of Vladivostok, where the concentration of all metals, except for Cd, exceeds the threshold levels, at which negative biological effects are possible. Biological tests of marine crustaceans were conducted between 2003 and 2014 on water toxicity in this most contaminated bay water area. However, only in August 2003, September 2003, and July 2007, the survival rate of mysids in the surface water of the entire inner area was credibly lower than that in the outer part of the bay. In the following years, the ecotoxicological condition of the bay water improved owing to the decrease in contamination.

scholarly journals Hydrochemical and microbiological assessment of the current state of the Vostok Bay. 

2020 ◽  
pp. 64-72
Author(s):  
Н.К. ХРИСТОФОРОВА ◽  
Т.В. БОЙЧЕНКО ◽  
А.Д. КОБЗАРЬ
Keyword(s):  
Sea Of Japan ◽  
Marine Reserve ◽  
Water Area ◽  
The Sea Of Japan ◽  
Vostok Bay ◽  
Environmental Situation ◽  
Current State ◽  
Microbiological Indicators

Проведены химико-экологические и микробиологические исследования современного состояния поверхностных прибрежных вод зал. Восток (Японское море). Наиболее напряженная экологическая ситуация отмечена в бухте Гайдамак, в районах у Волчанецкой протоки и устья р. Литовка. Протока, а также приустьевая зона р.Литовка являются главными тревожными участками в морском заказнике Залив Восток . The current state of the Vostok Bay water area (the Sea of Japan) is estimated using hydrochemical and microbiological indicators. The most intense environmental situation was noted for Gaydamak Bight, the area near the Volchanets duct and the mouth of the Litovka River. The duct, as well as the mouth of the Litovka River, are the main alarming sites in the Vostok Bay marine reserve.

scholarly journals WAVE FORCES AGAINST SEA WALL

1964 ◽  
Vol 1 (9) ◽  
pp. 31 ◽  
Author(s):  
Masashi Hom-ma ◽  
Kiyoshi Horikawa
Keyword(s):  
Experimental Data ◽  
Surf Zone ◽  
Vertical Wall ◽  
Experimental Studies ◽  
Wave Forces ◽  
Wave Pressure ◽  
Scientists And Engineers ◽  
The University ◽  
Sea Wall ◽  
Inclined Surface

The study concerning the wave forces acting on breakwater has been conducted by numerous scientists and engineers both in field and in laboratory,, While few studies have been carried out on the wave forces acting on sea wall which is located inside the surf zone. In this paper are summarized the main results of the experimental studies conducted at the University of Tokyo, Japan, in relation to the subject on the wave forces against a vertical or inclined surface wall located shorewards from the breaking point, and also is proposed an empirical formula of wave pressure distribution on a sea wall on the basis of the experimental data. The computed results obtained by using the above formula are compared with the field data of wave pressure on a vertical wall measured at the Niigata West Coast, Niigata Prefecture, Japan, and also with the experimental data of total wave forces on a vertical wall; the project of the latter is now in progress at the University of Tokyo.

Ocean wave spectra estimation with the Earth Explorer 10 candidate Harmony

2021 ◽  
Author(s):  
Marcel Kleinherenbrink ◽  
Paco Lopez-Dekker ◽  
Bertrand Chapron ◽  
Alexis Mouche
Keyword(s):  
Tropical Cyclones ◽  
Wind Waves ◽  
Surface Current ◽  
Storm Surges ◽  
Wave Spectra ◽  
One Dimensional ◽  
Structure And Dynamics ◽  
The Earth ◽  
Medium Length ◽  
Limited Coverage

<p>Tropical cyclones are commonly linked to devastation by hurricane-force winds, storm surges and rainfall. They are also responsible for large exchanges of heat in the upper ocean and the atmosphere, and the transport of large quantities of water from ocean to land. Due to the limited coverage of microwave observations from airplanes and the limited resolution of spaceborne scatterometers, the dynamics inside these extremes are poorly sampled and understood. Synthetic Aperture Radar (SAR) overcomes these limitations, but is only able to recover one-dimensional information, which limits the accuracy of estimated quantities like wind speed, total surface current and wave spectra. Waves radiating outward are, during their development, affected by wind and currents inside of the tropical cyclone and therefore contain information about the structure and dynamics of the system. Wave spectra in tropical cyclones can only partly be recovered, as the quickly changing sea surface limits the resolution of SAR in the azimuth direction. This presentation shows the benefit of having Harmony's bi-static receivers flying in a StereoSAR configuration with Sentinel-1D for the retrieval of wave spectra. Harmony's data allows for the retrieval of a larger fraction of the wave spectra. In the periphery of tropical cyclones Harmony will primarily enhance the recovery of medium-length (100-300 m) swell and wind waves, while Harmony also improves the recovery of long (swell) waves (>200 m) near the eye of the storm.</p>

scholarly journals Operational Hazard Assessment of Waves and Storm Surges from Tropical Cyclones in Mexico

2017 ◽  
Vol 98 (3) ◽  
pp. 503-515 ◽  
Author(s):  
Christian M. Appendini ◽  
Michel Rosengaus ◽  
Rafael Meza-Padillaand ◽  
Victor Camacho-Magaña
Keyword(s):  
Numerical Modeling ◽  
Tropical Cyclones ◽  
Local Governments ◽  
Wind Waves ◽  
Storm Surges ◽  
Graphical Interface ◽  
Severe Storms ◽  
Wave Parameters ◽  
Emergency Managers ◽  
Operational Tool

Abstract Tropical cyclones and their associated impacts along the western and eastern Mexican coastlines have led to the recent announcement of the creation of a National Hurricane and Severe Storms Center in Mexico. While Mexico falls under the responsibility of the Regional Specialized Meteorological Center in Miami, the newly announced center aims to provide local warning advisories to local governments and emergency managers. This study developed their first operational tool, which provides rapid forecasts of hazard areas under the presence of waves and storm surges from tropical cyclones threatening Mexico. The tool is based on precomputed wave parameters and storm surges from 3,100 synthetic tropical cyclones. Maximum envelope maps for all of the events are stored in a system database that is accessed through a graphical interface. Using a search function of synthetic events, the user can select those events most analogous to the tropical cyclone in question in order to make an assessment of warning areas. The tool allows users to plot maximum envelope maps for individual events or maxima of maximum maps combining several events, either using precomputed values for the different parameters (wind, waves, and storm surge) or a normalized map. To demonstrate the capabilities of the operational tool, we present an example application based on Hurricane Patricia (2015). This tool could also be implemented by developing countries affected by tropical cyclones, which otherwise are often limited by numerical modeling capabilities, time, and budgets.

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