aariПроблемы Арктики и АнтарктикиArctic and Antarctic Research0555-26482618-6713Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт10.30758/0555-2648-2020-66-3-246-266aari-288Research ArticleОКЕАНОЛОГИЯOCEANOLOGYТрансформация атлантической воды в северо-восточной части Баренцева моря в зимний сезонTransformation of Atlantic Water in the north-eastern Barents Sea in winterИвановВ. В.IvanovV. V.

Москва

Санкт-Петербург

Moscow

St. Petersburg

vladimir.ivanov@aari.ruФроловИ. Е.FrolovI. E.

Санкт-Петербург

St. Petersburg

ФильчукК. В.FilchukK. V.

Санкт-Петербург

St. Petersburg

Московский государственный университет им. М.В. Ломоносова; ГНЦ РФ Арктический и антарктический научно-исследовательский институтРоссияLomonosov Moscow State University; State Scientific Center of the Russian Federation Arctic and Antarctic Research InstituteRussian FederationГНЦ РФ Арктический и антарктический научно-исследовательский институтРоссияState Scientific Center of the Russian Federation Arctic and Antarctic Research InstituteRussian Federation202028092020663246266Copyright © Иванов В.В., Фролов И.Е., Фильчук К.В., 20202020Иванов В.В., Фролов И.Е., Фильчук К.В.Ivanov V.V., Frolov I.E., Filchuk K.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.aaresearch.science/jour/article/view/288

Гидрологические наблюдения, выполненные в марте–мае 2019 г. во время экспедиции «Трансарктика-2019» на борту НЭС «Академик Трёшников», позволили изучить механизмы трансформации Атлантической воды (АВ) в Баренцевом море. Хотя эта тема является довольно традиционной при изучении океанографии Баренцева моря, сохраняется ряд вопросов, которые требуют прояснения. Среди этих вопросов можно выделить более глубокое понимание процессов трансформации АВ в определенных районах моря в холодное время года, когда количество натурных наблюдений ограничено. В данном исследовании был проведен TS-анализ гидрологических профилей, выполненных в северо-восточном регионе Баренцева моря — области, в которой зимние полевые исследования затруднены из-за сложных ледовых условий. Полученные результаты позволили определить зоны, расположенные вдоль ветвей распространения АВ, где различные типы вертикальной конвекции и каскадинга являются доминирующими механизмами, обеспечивающими трансформацию АВ по мере их движения. По результатам анализа было выделено несколько характерных механизмов трансформации. Преимущество использованных в данной работе зимних измерений заключается в том, что активная стадия механизмов трансформации явно прослеживается в данных наблюдений на последовательных гидрологических разрезах.

Hydrographic observations, carried out in March-May, 2019 during “Transarktika-2019” expedition onboard R/V “Akademik Tryoshnikov” allowed studying mechanisms of Atlantic Water (AW) transformation in the Barents Sea. Although this research topic is rather traditional for oceanographic studies, there are still a number of questions, which require clarification. Among these is a deeper understanding of the AW transformation in specific regions in cold season, when the coverage by observations is scarce. In this study we performed temperature and salinity (TS) analysis of conductivity — temperature — depth (CTD) data, collected in the north-eastern “corner” of the Barents Sea — this is the area with difficult access in winter due to high concentration of pack ice. The results allowed identification of areas along the pathways of AW branches, where various types of open sea convection and cascading acted as dominant processes of AW properties change. We distinguish several driving mechanisms controlling modification of the waters of Atlantic origin. An advantage of winter measurements is that the active stage of AW transformation mechanisms is explicitly observed at the consecutive CTD sections.

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