Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk)

Ковалев Дмитрий Петрович; Куркин Андрей Александрович; Ковалев Петр Дмитриевич

doi:10.2205/2026es001140

ВАК 1.6.17 УДК 551.46.09 ГРНТИ 37.25 ОКСО 05.06.01 ББК 260 ТБК 6325 BISAC SCI067000 ВАК 1.6 УДК 551.468 УДК 55 УДК 550.34 УДК 550.383 ГРНТИ 37.01 ГРНТИ 37.15 ГРНТИ 37.31 ГРНТИ 38.01 ГРНТИ 36.00 ГРНТИ 37.00 ГРНТИ 38.00 ГРНТИ 39.00 ГРНТИ 52.00 ББК 26 ТБК 63 BISAC SCI

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COASTAL-TRAPPED BAROCLINIC KELVIN WAVES IN MORDVINOVA BAY (SEA OF OKHOTSK) Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk)

АА Аа

Опубликовано в Russian Journal of Earth Sciences · Том 26, Номер 4 · Номер статьи: ES4003 · Рубрика: ОРИГИНАЛЬНЫЕ СТАТЬИ

DOI: https://doi.org/10.2205/2026es001140 · EDN: JTNFIE

Получено: 27.02.2026 Одобрено: 13.05.2026 Опубликовано: 17.10.2026 Язык публикаций: ENG

Авторы

КО

Ковалев Дмитрий Петрович

ORCID

КУ

Куркин Андрей Александрович

ORCID

КО

Ковалев Петр Дмитриевич

ORCID

КО

Ковалев Дмитрий Петрович

Институ́т морско́й геоло́гии и геофи́зики ДВО РАН Россия · Южно-Сахалинск

ORCID

КУ

Куркин Андрей Александрович

Нижегородский государственный технический университет Нижний Новгород

ORCID

КО

Ковалев Петр Дмитриевич

Институ́т морско́й геоло́гии и геофи́зики ДВО РАН Россия · Южно-Сахалинск

ORCID

АННОТАЦИЯ

Based on a multi-month observation time series with one-second temporal resolution of seawater temperature and sea level oscillations obtained in 2015–2025 off the southeastern coast of Sakhalin Island in Mordvinova Bay, low-frequency wave processes in the coastal zone were analyzed. A pronounced seasonal contrast in the amplitude of temperature oscillations was identified: during the autumn–winter period, temperature variations generally do not exceed 2◦C, whereas in the spring–summer season, beginning in May, large-amplitude oscillations develop, increasing with progressive water warming and reaching ∼ 7◦C. Interannual comparison of the time series reveals a high degree of reproducibility in the temporal structure of the oscillations (correlation coefficients between the 2025 and 2020 and 2025 and 2022 records range from 0.76 to 0.82), indicating a common underlying generation mechanism. Spectral analysis identified a set of persistent peaks in the period range of 3–43 days, recurring in different years and partially coinciding with characteristic periods of atmospheric pressure and wind variability. The combination of the observed periods, their seasonal occurrence under stratified conditions, and the consistency of the basin spatial scales with the first baroclinic Rossby radius of deformation supports the interpretation of the temperature oscillations as manifestations of coastal-trapped baroclinic Kelvin waves. Analysis of the 2025 data shows that southerly winds prevail from mid-April to late August, coinciding with the period of intensified baroclinic temperature variability. Calculation of the absolute value of the transfer function for the wind-sea level and wind-temperature time series pairs confirms more efficient energy transfer from wind to baroclinic oscillations during the spring-summer season, indicating the leading role of southerly winds in generating the observed regime. Additional analysis of satellite-derived sea ice concentration shows that the decay of seasonal ice cover occurs by late March–early April, several weeks before the onset of high-amplitude oscillations. This indicates that sea ice processes play a secondary role and cannot explain the observed low-frequency variability.

КЛЮЧЕВЫЕ СЛОВА

time series, seawater temperature, sea level, spectral analysis, baroclinic wave, Kelvin wave, Mordvinova Bay, wind speed

Финансирование

This study was carried out within the framework of the state assignment of the Institute of Marine Geology and Geophysics, Far Eastern Branch of the Russian Academy of Sciences (FWWM-2024-0002).

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Контент доступен под лицензией Creative Commons «С указанием авторства версии 4.0 Международная» Creative Commons

ГОСТ

Ковалев Д. П., Куркин А. А., Ковалев П. Д. Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk) // Russian Journal of Earth Sciences. 2026. № 4. ES4003. DOI: https://doi.org/10.2205/2026es001140. EDN: JTNFIE. (дата обращения: 20.10.2026).

MLA

Ковалев Дмитрий Петрович, Куркин А. А., Ковалев П. Д.. "Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk)." Russian Journal of Earth Sciences 26.4 (2026): ES4003. DOI: https://doi.org/10.2205/2026es001140. EDN: JTNFIE.

APA

Ковалев Д. П., Куркин А. А., Ковалев П. Д. (2026). Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk). Russian Journal of Earth Sciences, 26(4), ES4003. https://doi.org/10.2205/2026es001140 EDN: JTNFIE.

Chicago

Ковалев Дмитрий Петрович, Куркин А. А., Ковалев П. Д.. "Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk)." Russian Journal of Earth Sciences 26, no. 4 (2026): ES4003. https://doi.org/10.2205/2026es001140. EDN: JTNFIE.

WIKI

{{cite journal | author = Ковалев Д. П., Куркин А. А., Ковалев П. Д. | title = Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk) | journal = Russian Journal of Earth Sciences | year = 2026 | volume = 26 | issue = 4 | pages = ES4003 | doi = 10.2205/2026es001140 }} EDN: JTNFIE

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COASTAL-TRAPPED BAROCLINIC KELVIN WAVES IN MORDVINOVA BAY (SEA OF OKHOTSK) Coastal-Trapped Baroclinic Kelvin Waves in Mordvinova Bay (Sea of Okhotsk)

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