aariПроблемы Арктики и АнтарктикиArctic and Antarctic Research0555-26482618-6713Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт10.30758/0555-2648-2020-66-3-267-278aari-289Research ArticleОКЕАНОЛОГИЯOCEANOLOGYРаспределение взвешенных частиц в Баренцевом море в конце зимы 2019 г.Distribution of suspended particulate matter in the Barents Sea in late winter 2019БюттнерШ.BuettnerS.sbuettner@ecology.uni-kiel.deИвановВ. В.IvanovV. V.

Санкт-Петербург

Москва

St. Petersburg

Moscow

КассенсХ.KassensH.

Киль

Kiel

Куссе-ТюзН. А.Kusse-TiuzN. A.

Санкт-Петербург

St. Petersburg

Институт по исследованию экосистем, университет КиляГерманияInstitute for Ecosystem Research, Kiel UniversityGermanyГНЦ РФ Арктический и aнтарктический научно-исследовательский институт; Московский государственный университет им. М.В. ЛомоносоваРоссияState Scientific Center of the Russian Federation Arctic and Antarctic Research Institute; Lomonosov Moscow State UniversityRussian FederationЦентр морских исследований в объединении им. Гельмгольца ГЕОМАРГерманияGEOMAR Helmholtz Centre for Ocean Research KielGermanyГНЦ РФ Арктический и aнтарктический научно-исследовательский институтРоссияState Scientific Center of the Russian Federation Arctic and Antarctic Research InstituteRussian Federation202028092020663267278Copyright © Бюттнер Ш., Иванов В.В., Кассенс Х., Куссе-Тюз Н.А., 20202020Бюттнер Ш., Иванов В.В., Кассенс Х., Куссе-Тюз Н.А.Buettner S., Ivanov V.V., Kassens H., Kusse-Tiuz N.A.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/289

Летняя и зимняя площадь ледяного покрова в Арктике постоянно сокращается в результате изменения климата, воздействуя на гидрофизические и биогеохимические циклы на сезонно-безледных шельфах Евразийского бассейна. Возрастание продолжительности периода открытой воды приводит к увеличению образования взвешенного осадка и береговой эрозии в связи с увеличением ветровой нагрузки и высоты волн. Это влияет на оптические свойства водной толщи и, следовательно, на биологическую продуктивность в этом регионе. Во время первого этапа экспедиции «Трансарктика-2019» в конце зимы 2019 г. в центральной и северной частях Баренцева моря был собран обширный объем данных взвешенных частиц из фильтрованной воды и оптических данных. Совместный анализ данных о концентрации взвешенного вещества, полученных из проб воды, и оптических данных показал наличие ярко выраженного донного нефелоидного слоя на шельфе Баренцева моря даже в условиях наличия ледяного покрова. Более того, полученные результаты свидетельствуют о том, что желоб Франц-Виктория может быть основным путем переноса осадочного материала в Евразийский бассейн. Поэтому для того, чтобы связать изменения в распределении осадочных отложений и их влияние на экосистему в условиях потепления климата, необходимы дальнейшие исследования динамики осадочных отложений, особенно в зимний период.

Arctic summer and winter sea-ice extent is continuously declining as a result of climate change, affecting the hydrography and biogeochemical cycles on the seasonally ice-free Eurasian Shelves. The prolongation of the open-water season causes higher sediment resuspension and coastal erosion due to larger wind fetch and wave heights. This impacts the optical properties of the water column and hence biological productivity in this region. During “Transarktika-2019” leg 1 in late winter 2019, a comprehensive dataset of filtered water samples and optical data was collected throughout the central and northern Barents Sea. Combining suspended particulate matter concentrations obtained from water samples and optical data revealed a pronounced bottom nepheloid layer on the Barents Sea shelf even under ice-covered conditions. Moreover, the data indicate that the Franz Viktoria Trough could be a major pathway for sediment transport into the Eurasian Basin. Therefore, to link changes in sediment distribution and its impact on the ecosystem under a warming climate, further studies of sediment dynamics are required, particularly during winter.

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