hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.7868/S2073667318010033hydrophysics-739Research ArticleГИДРОФИЗИЧЕСКИЕ И БИОГЕОХИМИЧЕСКИЕ ПОЛЯ И ПРОЦЕССЫHYDROPHYSICAL AND BIOGEOCHEMICAL FIELDS AND PROCESSESВлияние флуктуаций атмосферного давления над Лигурийским морем на мезомасштабную динамику вод в Гибралтарском проливе и море АльборанInfluence of the atmospheric pressure fluctuations over the Mediterranean Sea on the mesoscale water dynamics of the Strait of Gibraltar and the Alboran SeaДастисК.DastisC.

Санкт-Петербург

St.-Petersburg

ИскуердоА.IzquierdoA.

Кадис

Cádiz, Mallorca

БруноМ.BrunoM.

Кадис

Cádiz, Mallorca

РейесЭ.ReyesE.

Мальорка

Moscow

СофьинаЕ. В.SofinaE. V.

Санкт-Петербург, Москва

St.-Petersburg, Moscow

sofjina_k@mail.ruПлинкН. Л.PlinkN. L.

Санкт-Петербург

St.-Petersburg

Российский государственный гидрометеорологический университетРоссияRussian State Hydrometeorological UniversityRussian FederationКадисский университетИспанияUniversity of Cádiz, CEIMAR; Balearic Islands Coastal Observing and Forecasting System (SOCIB)SpainПрибрежная система наблюдений Балеарских островов (SOCIB)ИспанияShirshov Institute of Oceanology, Russian Academy of SciencesSpainРоссийский государственный гидрометеорологический университет; Институт океанологии им. П.П. Ширшова, РАНРоссияRussian State Hydrometeorological University; Shirshov Institute of Oceanology, Russian Academy of SciencesRussian Federation2018151120221112839Copyright © Дастис К., Искуердо А., Бруно М., Рейес Э., Софьина Е.В., Плинк Н.Л., 20222022Дастис К., Искуердо А., Бруно М., Рейес Э., Софьина Е.В., Плинк Н.Л.Dastis C., Izquierdo A., Bruno M., Reyes E., Sofina E.V., Plink N.L.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/739

Рассмотрено влияние флуктуаций атмосферного давления на интенсивность поступления через Гибралтарский пролив поверхностных атлантических вод как фактора, определяющего особенности формирования циркуляции вод в море Альборан. Подтверждено, что на мезомасштабную динамику вод Гибралтарского пролива влияют атмосферные процессы в области значительно превышающей собственно зону Гибралтарского пролива. Показано, что Лигурийское море — район, наиболее репрезентативно отражающий связь межу интенсивностью водообмена в верхнем слое Гибралтарского пролива и изменением атмосферного давления. На основе данных натурных наблюдений о скорости течения в верхнем слое Гибралтарского пролива и данных NCEP-CFSR реанализа об атмосферном давлении показано, что уменьшение атмосферного давления в Лигурийском море приводит к усилению интенсивности поступления атлантических вод, а его повышение — к уменьшению. Высказанная гипотеза о локализации воздействия атмосферного давления, влияющего на поступление атлантических вод, подтверждается результатами моделирования, полученными на основе одномерной гидродинамической модели. Основное внимание уделено анализу влияния синоптической изменчивости атмосферного давления на интенсивность поступления через Гибралтарский пролив атлантических вод, а также роли субинерциальной изменчивости водообмена в формировании мезомасштабной динамики моря Альборан. Анализ поверхностной циркуляции в море Альборан проводился с использованием данных о полях поверхностных течений, восстановленных по радарным наблюдениям, и спутниковых данных о хлорофилле.

The effect of subinertial sea level atmospheric pressure fluctuations on the inflow intensity of the surface Atlantic waters through the Strait of Gibraltar and its impacts on the dynamics of the Alboran Sea is studied. The results confirm that the exchange flows in the Strait is affected by atmospheric processes of much larger spatial scale than the Strait of Gibraltar itself. The Ligurian Sea is the region where atmospheric pressure fluctuations correlate better with Atlantic inflow anomalies through the Strait of Gibraltar. Correlation between in situ measurements of the surface flow velocity in the Strait of Gibraltar and NCEP-CFSR reanalysis data of the atmospheric pressure for the whole Mediterranean basin shows that a decrease of atmospheric pressure in the Ligurian Sea leads to an intensification of the Atlantic water inflow, and conversely, an increase of atmospheric pressure to a decrease. The hypothesis about the remote effect of atmospheric pressure fluctuations in the Atlantic water inflow through the Strait of Gibraltar is confirmed by the results of a simulation based on a one-dimensional hydrodynamic model. The subinertial variability of the Atlantic inflow induced by atmospheric pressure fluctuations has an impact on the formation of the mesoscale dynamics of the Alboran Sea. This is confirmed by an analysis of the HF-radar surface current measurements in the Alboran Sea and satellite observations of chlorophyll-a concentration.

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The authors declare that there are no conflicts of interest present.