Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 90547 10.2205/2025ES000967 drhlzx Спецвыпуск: "Наука о данных, геоинформатика и системный анализ в изучении Земли" Special Issue: “Data Science, Geoinformatics and Systems Analysis in Geosciences” Спецвыпуск: "Наука о данных, геоинформатика и системный анализ в изучении Земли" Enhanced Wintertime Convergence of Atmospheric and Oceanic Heat Transports in the Barents Sea Region under Present Climate Warming Enhanced Wintertime Convergence of Atmospheric and Oceanic Heat Transports in the Barents Sea Region under Present Climate Warming https://orcid.org/0000-0002-8170-9833 Латонин Михаил Михайлович Latonin Mikhail Mikhailovich m.m.latonin@ifaran.ru

кандидат географических наук;

candidate of geographical sciences;

 https://orcid.org/0000-0002-1257-4197 Башмачников Игорь Львович Bashmachnikov Igor L'vovich

кандидат географических наук;

candidate of geographical sciences;

 https://orcid.org/0000-0001-7632-7921 Семенов Владимир Анатольевич Semenov Vladimir Anatol'evich

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Международный центр по окружающей среде и дистанционному зондированию имени Нансена Санкт-Петербург Россия Nansen International Environmental and Remote Sensing Centre Saint Petersburg Russian Federation Федеральное государственное бюджетное учреждение науки Институт физики атмосферы им. А.М. Обухова Российской академии наук Москва Россия A.M. Obukhov Institute of Atmospheric Physics of the Russian Academy of Sciences Moscow Russian Federation Международный центр по окружающей среде и дистанционному зондированию имени Нансена Санкт-Петербург Россия Nansen International Environmental and Remote Sensing Centre Saint Petersburg Russian Federation Санкт-Петербургский государственный университет Санкт-Петербург Россия Saint Petersburg State University Saint Petersburg Russian Federation Институт физики атмосферы им. А.М. Обухова РАН Россия Obukhov Institute of Atmospheric Physics of the Russian Academy of Sciences Russian Federation Институт Географии РАН Россия Institute of Geography RAS Russian Federation 23 05 2025 23 05 2025 25 2 1 11 15 11 2024 15 04 2025 https://rjes.ru/en/nauka/article/90547/view

A distinctive feature of the Barents Sea climate system is a suggested positive feedback in the ocean–sea ice–atmosphere system that can enhance regional climate variations. The objective of this study is to assess the effectiveness of this positive feedback for the advective heat fluxes in the winter season using the ORAS4 ocean reanalysis and ERA5 atmospheric reanalysis data for the period 1959–2017. Based on the signs of the linear trends of the oceanic heat transport, two periods were identified for the analysis: 1959–1987 and 1987–2017. Composite maps of surface wind fields indicate an increase in the effectiveness of the positive feedback in the Barents Sea region during the present period relative to the previous one. This is manifested in the strengthening of the southern winds over the southeastern part of the sea in years with the maximum oceanic heat transport and in the weakening of the northern winds over the northwestern part of the sea in years with the minimum oceanic heat transport. The convergence of the atmospheric sensible heat transport over the Barents Sea has a maximum in the lower troposphere, 1000–900 hPa. An increasing synchronization of the convergence of atmospheric and oceanic heat transports in the Barents Sea region, derived in this study, contributes to an acceleration of the local warming.

A distinctive feature of the Barents Sea climate system is a suggested positive feedback in the ocean–sea ice–atmosphere system that can enhance regional climate variations. The objective of this study is to assess the effectiveness of this positive feedback for the advective heat fluxes in the winter season using the ORAS4 ocean reanalysis and ERA5 atmospheric reanalysis data for the period 1959–2017. Based on the signs of the linear trends of the oceanic heat transport, two periods were identified for the analysis: 1959–1987 and 1987–2017. Composite maps of surface wind fields indicate an increase in the effectiveness of the positive feedback in the Barents Sea region during the present period relative to the previous one. This is manifested in the strengthening of the southern winds over the southeastern part of the sea in years with the maximum oceanic heat transport and in the weakening of the northern winds over the northwestern part of the sea in years with the minimum oceanic heat transport. The convergence of the atmospheric sensible heat transport over the Barents Sea has a maximum in the lower troposphere, 1000–900 hPa. An increasing synchronization of the convergence of atmospheric and oceanic heat transports in the Barents Sea region, derived in this study, contributes to an acceleration of the local warming.

 Barents Sea advective heat fluxes atmospheric and oceanic circulation convergence Arctic warming climate feedbacks reanalysis datasets Barents Sea advective heat fluxes atmospheric and oceanic circulation convergence Arctic warming climate feedbacks reanalysis datasets This study was funded by the Russian Science Foundation (RSF), grant number 23-77-01046 (https://rscf.ru/en/project/23-77-01046/). M. M. L. would like to thank Alexander P. Makshtas for the valuable discussion on the methodology and advice. This study was funded by the Russian Science Foundation (RSF), grant number 23-77-01046 (https://rscf.ru/en/project/23-77-01046/). M. M. L. would like to thank Alexander P. Makshtas for the valuable discussion on the methodology and advice.

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