Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series
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...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, The Geophysical Center
2024-06-01
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| Series: | Russian Journal of Earth Sciences |
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| Online Access: | http://doi.org/10.2205/2024ES000908 |
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| author | Kovalev Dmitry Kurkin Andrey Kovalev Petr Zarochintsev Vitaliy |
| author_facet | Kovalev Dmitry Kurkin Andrey Kovalev Petr Zarochintsev Vitaliy |
| author_sort | Kovalev Dmitry |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-4d6387e59e64459085ed97989f563e7c |
| institution | Kabale University |
| issn | 1681-1208 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Russian Academy of Sciences, The Geophysical Center |
| record_format | Article |
| series | Russian Journal of Earth Sciences |
| spelling | doaj-art-4d6387e59e64459085ed97989f563e7c2025-08-20T03:56:04ZengRussian Academy of Sciences, The Geophysical CenterRussian Journal of Earth Sciences1681-12082024-06-0124311710.2205/2024ES000908Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time SeriesKovalev Dmitry0https://orcid.org/0000-0002-5184-2350Kurkin Andrey1https://orcid.org/0000-0003-3828-6406Kovalev Petr2https://orcid.org/0000-0002-7509-4107Zarochintsev Vitaliy3https://orcid.org/0000-0002-4015-9441Institute of Marine Geology and Geophysics Far Eastern Branch Russian Academy of SciencesNizhny Novgorod State Technical University n.a. R.E. AlekseevInstitute of Marine Geology and Geophysics Far Eastern Branch Russian Academy of SciencesNizhny Novgorod State Technical University n.a. R. E. AlekseevThe 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.http://doi.org/10.2205/2024ES000908sea level variations tidal waves wave set-up storm surge and downsurge inverted barometer cnoidal wave |
| spellingShingle | Kovalev Dmitry Kurkin Andrey Kovalev Petr Zarochintsev Vitaliy Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series Russian Journal of Earth Sciences sea level variations tidal waves wave set-up storm surge and downsurge inverted barometer cnoidal wave |
| title | Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series |
| title_full | Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series |
| title_fullStr | Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series |
| title_full_unstemmed | Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series |
| title_short | Investigation of Tidal and Subtidal Variations in Sea Level Close to the Southeastern Coast of Sakhalin Island Using Two-Year Time Series |
| title_sort | investigation of tidal and subtidal variations in sea level close to the southeastern coast of sakhalin island using two year time series |
| topic | sea level variations tidal waves wave set-up storm surge and downsurge inverted barometer cnoidal wave |
| url | http://doi.org/10.2205/2024ES000908 |
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