Analysis of Internal Solitary Waves in the Gulf of Oman and Sources Responsible for Their Generation

Koohestani, Kamran; Stepanyants, Yury; Allahdadi, Mohammad Nabi

doi:10.3390/w15040746

Cited by 7 publications

(3 citation statements)

References 41 publications

(51 reference statements)

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“…Moreover, internal waves can also be generated under the effect of wind. Wind-generated internal waves have been widely studied and it has been demonstrated that the divergence and convergence of wind velocity, as well as time-space-varying wind field, can excite baroclinic instabilities [12][13][14]), as cited by Koohestani et al [15].…”

Section: Introductionmentioning

confidence: 99%

Effect of Internal Waves on the Hydrodynamics of a Mediterranean Sea Strait

Fourniotis

2024

JMSE

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In the present work, the effects of wind- and tide-induced internal waves in the Rio-Antirio Strait in western Greece were studied by using three-dimensional numerical simulations. For the wind-induced flow in the strait, it emerged that the internal waves’ initiation is associated with the direction of the wind. Tidal action, with or without the combined action of wind, also generates internal waves in the strait, with amplitudes higher than 20 m. The action of the internal waves causes a subsurface inflow of colder waters from the Gulf of Corinth to the Gulf of Patras, as has been also simulated for the case of the wind-induced flow, generating strong hypolimnetic currents. The exchange flowrate between the Gulf of Patras and the Gulf of Corinth appeared to undergo significant modification for the wind-induced flow and had little effect for the pure tidal flow (in windless conditions) due to the development and action of the internal waves at the strait. The combined action of the tide and the wind was found to marginally affect the exchange flowrate between the two gulfs compared to the pure tidal flow. The interaction between the Coriolis effect and internal waves, at least away from the strait, forms a characteristic horizontal structure of flow. The structure of turbulence in the near strait area under the action of internal waves generated by the wind and/or tide was also discussed and compared with the corresponding barotropic flow.

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Section: Introductionmentioning

confidence: 99%

Effect of Internal Waves on the Hydrodynamics of a Mediterranean Sea Strait

Fourniotis

2024

JMSE

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“…It should be noted that there are quite a large number of papers on monitoring sea level changes near coasts in different areas of the World Ocean, for example, [Pérez Gómez et al, 2022;Valentim et al, 2013;Williams, 2013] but the observations obtained from these studies are used to analyze coastal erosion or to monitoring sea level changes associated with climate change and possible coastal flooding. In the recent paper [Koohestani et al, 2023] the authors analyzed the appearance of internal solitary waves in the Bay of Oman caused different mechanisms including variations of atmospheric pressure, wind, currents, etc. Note also two more publications that relate to the study of long-term changes in sea level and the identification of a trend in rising sea levels [Goryachkin et al, 1999;Raj et al, 2022].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series

Kovalev,

Kurkin,

Kovalev

et al. 2024

Russian Journal of Earth Sciences

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The results of the study of tidal and subtidal variations in sea level in the area of the southeastern coast of the Sakhalin Island and a series of atmospheric pressure and wind speed from the open website “Weather Schedule” are presented. Using spectral analysis, astronomical tides were studied and diurnal M1, K1 and semi-diurnal M2, S2 tidal harmonics with high energy were detected. The maximum heights of tidal waves have been determined and the tidal regime in the studied water area is classified as mixed with a predominance of diurnal tides. It is shown that sea level rises due to the impact of winds on the sea surface are observed in the northerly direction of the winds, which is associated with storm surge in the coastal zone of Mordvinov Bay. The lowering of the sea level is observed with southerly winds and it is caused by the downsurge. The magnitude of the decrease in sea level for events that have a correlation between high wind speeds and the duration of influence to the winds of the western directions is maximal, and the wind speed has less influence on the magnitude of the decrease in level than its duration. Calculations of the level response to changes in atmospheric pressure using the Proudman equation and analysis of the results showed that these events can be attributed to the phenomenon of the “inverted barometer”. A comparison of theoretical profiles calculated from the time form of the Korteweg–de Vries equation with the registered profiles of sea level showed that they are well described by the profile of a solitary wave.

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“…Zhang et al [29] revealed a cascade process from ISWs to turbulent mixing via high-frequency internal waves near the maximum local buoyancy frequency in the deep water of the northern South China Sea by high-resolution mooring observations. Koohestani et al [30] used a combination of multiple data sources to study the characteristics of ISWs in the Gulf of Oman. Beyond that, due to the complex islands and rough topography, the outflow of the Indonesian Transport Flow (ITF) is a hotspot for ISWs.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Internal Solitary Waves in the Timor Sea Observed by SAR Satellite

et al. 2023

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Internal solitary waves (ISWs) with features such as large amplitude, short period, and fast speed have great influence on underwater thermohaline structure, nutrient transport, and acoustic signal propagation. The characteristics of ISWs in hotspot areas have been revealed by satellite images combined with mooring observation. However, the ISWs in the Timor Sea, which is located in the outflow of the ITF, have not been studied yet and the characteristics are unrevealed. In this study, by employing the Synthetic Aperture Radar (SAR) images taken by the Sentinel-1 satellite from 2017 to 2022, the temporal and spatial distribution characteristics of ISWs in the Timor Sea are analyzed. The results show that most of ISWs appear in Bonaparte basin and its vicinity. The average wavelength of the ISWs is 248 m, and most of the wave lengths are less than 400 m. The peak line of ISWs is longer in deeper water. The underwater structures of two typical ISWs are reconstructed based on the Korteweg–de Vries (KdV) equation combined with mooring observation. This shows that, compared with the two-layer model, the continuous layered model is more suitable for reconstructing the underwater structures of ISWs. Further analysis shows that both the rough topography and the spring-neap tides contribute to the generation of ISWs in the Timor Sea. This study fills a gap in knowledge of ISWs in regional seas, such as the Timor Sea.

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Analysis of Internal Solitary Waves in the Gulf of Oman and Sources Responsible for Their Generation

Cited by 7 publications

References 41 publications

Effect of Internal Waves on the Hydrodynamics of a Mediterranean Sea Strait

Effect of Internal Waves on the Hydrodynamics of a Mediterranean Sea Strait

Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series

Characteristics of Internal Solitary Waves in the Timor Sea Observed by SAR Satellite

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