hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.59887/2073-6673.2025.18(2)-2EEVAUMhydrophysics-1428Research ArticleГИДРОФИЗИЧЕСКИЕ И БИОГЕОХИМИЧЕСКИЕ ПОЛЯ И ПРОЦЕССЫHYDROPHYSICAL AND BIOGEOCHEMICAL FIELDS AND PROCESSESПространственно-временная структура и изменчивость термохалинных параметров в промежуточном слое вод к северу от архипелага Северная ЗемляSpatiotemporal Structure and Variability of Thermohaline Parameters in the Intermediate Water Layer North of the Severnaya Zemlya Archipelagohttps://orcid.org/0000-0003-2569-6027ИвановВ. В.IvanovV. V.

Иванов Владимир Владимирович, главный научный сотрудник, доктор физико-математических наук

119991, г. Москва, Ленинские горы, д. 1

Scopus AuthorID: 57203338116

WoS ResearcherID: J‑5979–2014

1 Leninskie Gory, Moscow, 119991

vladimir.ivanov@aari.ruhttps://orcid.org/0000-0002-5741-9801ДаньшинаА. В.DanshinaA. V.

Даньшина Анна Владимировна, старший научный сотрудник, кандидат физико-математических наук

199397, г. Санкт-Петербург, ул. Беринга, д. 38

Scopus AuthorID: 55781395200

WoS ResearcherID: AEG‑1081–2022

38 Bering Str., St. Petersburg, 199397

danshina@aari.ruhttps://orcid.org/0000-0003-3231-7283СмирновА. В.SmirnovA. V.

Смирнов Александр Викторович, старший научный сотрудник, кандидат географических наук

199397, г. Санкт-Петербург, ул. Беринга, д. 38

Scopus AuthorID: 56264603400

WoS ResearcherID: J‑5935–2014

38 Bering Str., St. Petersburg, 199397

alexander.vic.smirnov@gmail.comМосковский государственный университет им. М.В. ЛомоносоваРоссияLomonosov Moscow State UniversityRussian FederationАрктический и антарктический научно-исследовательский институтРоссияArctic and Antarctic Research InstituteRussian Federation2025140720251821940Copyright © Иванов В.В., Даньшина А.В., Смирнов А.В., 20252025Иванов В.В., Даньшина А.В., Смирнов А.В.Ivanov V.V., Danshina A.V., Smirnov A.V.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/1428

Временные серии температуры и электропроводности воды, полученные за три года непрерывных измерений на семи автономных буйковых станциях к северу от архипелага Северная Земля в Арктическом бассейне Северного Ледовитого океана, проанализированы совместно с данными численного моделирования с целью изучения пространственно-временной изменчивости температуры и солености в промежуточном слое вод атлантического происхождения, распространяющихся вдоль континентального склона Евразии в потоке Арктического пограничного течения. В пределах 85-ти км от бровки шельфа выделено три ветви переноса атлантической воды, каждая из которых характеризуется своей предысторией, определяющей изменчивость их термохалинных параметров. Наиболее энергоемкая мода временной изменчивости на всех автономных буйковых станциях определяется колебаниями с периодом около 12 мес., амплитуда которых уменьшается по мере удаления от бровки шельфа, а фаза различна в разных ветвях атлантической воды. Данные численного моделирования показали, что в районе постановки автономных буйковых станций зависимость фазы колебаний от расстояния до пролива Фрама, характерная для западной части бассейна Нансена, нарушается массированным поступлением охлажденной/распресненной воды через желоб Св. Анны.

Time series of water temperature and conductivity obtained over three years of continuous measurements at seven autonomous moored stations north of the Severnaya Zemlya archipelago located in the Arctic Basin of the Arctic Ocean were analyzed in combination with numerical modeling to investigate the spatiotemporal variability of temperature and salinity in the intermediate layer of Atlantic-origin waters. These waters propagate along the Eurasian continental slope within the Arctic Boundary Current (ABC). Within 85 km of the shelf edge, three distinct branches of Atlantic Water (AW) transport were identified, each characterized by a unique origin history of origin that shapes the variability of its thermohaline properties. The most energetic mode of temporal variability at all stations is associated with oscillations with a period of approximately 12 months. The amplitude of these oscillations decreases with increasing distance from the shelf edge, while their phase differs among the AW branches. Numerical modeling indicates that, in the study region, the typical phase–distance relationship observed in the western Nansen Basin is disrupted by the large-scale input of cold, freshened water through the St. Anna Trough.

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