Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis

Varvara Bagatinskaya; Vladislav Bagatinsky; Eugene Morozov; N. A. Dianskiy; Anatoly Gusev

doi:10.2205/2026es001088

VAK Russia 1.6 UDC 551.465 CSCSTI 37.01 Russian Classification of Professions by Education 05.00.00 Russian Library and Bibliographic Classification 26 Russian Trade and Bibliographic Classification 63 BISAC SCI UDC 551.465.4 UDC 55 UDC 550.34 UDC 550.383 CSCSTI 37.15 CSCSTI 37.25 CSCSTI 37.31 CSCSTI 38.01 CSCSTI 36.00 CSCSTI 37.00 CSCSTI 38.00 CSCSTI 39.00 CSCSTI 52.00

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VARIABILITY OF THE DOME-LIKE FORM OF THE DEEP WATER TEMPERATURE IN THE WEDDELL SEA BASED ON ORAS5 REANALYSIS Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis

АА Аа

Published in Russian Journal of Earth Sciences · Volume 26, Issue 1 · ELocator: ES1014 · Rubric: ORIGINAL ARTICLES

DOI: https://doi.org/10.2205/2026es001088 · EDN: RJQAVW

Received: 29.09.2025 Accepted: 19.11.2025 Published: 09.04.2026 Language of publication: ENG

Authors

Varvara Bagatinskaya

ORCID

Vladislav Bagatinsky

ORCID Scopus ResearcherID SPIN

Eugene Morozov

ORCID Scopus SPIN

N. A. Dianskiy

ORCID

et al.

Anatoly Gusev

ORCID

Varvara Bagatinskaya

Lomonosov Moscow State University Russian Federation

Zubov State Oceanographic Institute Russian Federation

ORCID

Vladislav Bagatinsky

Academic degree: candidate of physical and mathematical sciences

Lomonosov Moscow State University Russian Federation

Zubov State Oceanographic Institute Russian Federation

Shirshov Institute of Oceanology Russian Academy of Sciences Russian Federation

ORCID Scopus ResearcherID SPIN

Eugene Morozov

Academic degree: doctor of physical and mathematical sciences

Science rang: corresponding member author.academy_titles.32 ; docent author.academy_titles.32

Shirshov Institute of Oceanology Russian Academy of Sciences Russian Federation

ORCID Scopus SPIN

N. A. Dianskiy

Zubov State Oceanographic Institute Russian Federation

Lomonosov Moscow State University Russian Federation

Shirshov Institute of Oceanology Russian Academy of Sciences Russian Federation

ORCID

Anatoly Gusev

Marchuk Institute of Numerical Mathematics of RAS Senior researcher · Russian Federation · Moscow

Shirshov Institute of Oceanology Russian Academy of Sciences Russian Federation

Zubov State Oceanographic Institute Russian Federation

ORCID

ABSTRACT

The variability of the dome-like form position of the Weddell Sea Deep Water (WSDW) has been studied based on ORAS5 datasets. According to these data, the upper boundary of the deep water occupied the highest position during most of 2005, and the lowest position in 2014 relative to its mean for 1993–2023. This change occurred because of the intensification of negative wind vorticity in 2005 and its weakening in 2014. Between 1993 and 2023, a permanent water transport from the Weddell Sea to the Scotia Sea was detected over the depth corresponding to the sill in the Orkney Passage in the ORAS5 data. In 2005, this transport was almost unchanged, whereas in 2014 it became stronger. When the dome boundary of WSDW moves up in the central part of the Weddell Sea, the outer parts of the dome move down, and vice versa. In the northern part of the Weddell Sea, this motion of isotherms and isopycnals causes either colder or warmer water parts of the WSDW column to overflow the crest of the South Scotia Ridge and continue its motion in the Scotia Sea.

KEYWORDS

Weddell Sea Deep Water, abyssal water, seasonal variability, ORAS5

Funding

The study was conducted under the state assignment to the Lomonosov Moscow State University (no. 122052000076-3) in the part of data processing, federal assignment to the Shirshov Institute of Oceanology RAS (no. FMWE2024-0016) in the part of oceanological investigation, and the Moscow Center of Fundamental and Applied Mathematics at INM RAS (Agreement no. 075-15-2025-347 with the Ministry of Education and Science of the Russian Federation) in the part of numerical analysis of the data. The data presented in this study are available at https: //data.marine.copernicus.eu/product/GLOBAL_MULTIYEAR_PHY_ENS_001_031. Data processing was performed with using the equipment of the Center for Collective Use of Ultra-High-Performance Computing Resources of Lomonosov Moscow State University [Voevodin et al., 2019] and the Joint SuperComputer Center of the Russian Academy of Sciences.

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GOST

Bagatinskaya V. V., Bagatinsky V. A., Morozov E. G., Dianskiy N. A., Gusev A. V. Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis // Russian Journal of Earth Sciences. 2025. no. 1. ES1014. DOI: https://doi.org/10.2205/2026es001088. EDN: RJQAVW. (Date of access 27.09.2026).

MLA

Varvara Bagatinskaya, Bagatinsky V. A., Morozov E. G., Dianskiy N. A., Gusev A. V.. "Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis." Russian Journal of Earth Sciences 26.1 (2025): ES1014. DOI: https://doi.org/10.2205/2026es001088. EDN: RJQAVW.

APA

Bagatinskaya V. V., Bagatinsky V. A., Morozov E. G., Dianskiy N. A., Gusev A. V. (2025). Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis. Russian Journal of Earth Sciences, 26(1), ES1014. https://doi.org/10.2205/2026es001088 EDN: RJQAVW.

Chicago

Varvara Bagatinskaya, Bagatinsky V. A., Morozov E. G., Dianskiy N. A., Gusev A. V.. "Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis." Russian Journal of Earth Sciences 26, no. 1 (2025): ES1014. https://doi.org/10.2205/2026es001088. EDN: RJQAVW.

WIKI

{{cite journal | author = Bagatinskaya V. V., Bagatinsky V. A., Morozov E. G., Dianskiy N. A., Gusev A. V. | title = Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis | journal = Russian Journal of Earth Sciences | year = 2025 | volume = 26 | issue = 1 | pages = ES1014 | doi = 10.2205/2026es001088 }} EDN: RJQAVW

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VARIABILITY OF THE DOME-LIKE FORM OF THE DEEP WATER TEMPERATURE IN THE WEDDELL SEA BASED ON ORAS5 REANALYSIS Variability of the Dome-Like Form of the Deep Water Temperature in the Weddell Sea Based on ORAS5 Reanalysis

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