Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula
The Southern Ocean is a key region for analyzing environmental drivers that regulate sea-air CO2 exchanges. These CO2 fluxes are influenced by several mesoscale structures, such as meanders, eddies and other mechanisms responsible for energy dissipation. Aiming to better understand sea-air CO2 dynam...
Published in: | Progress in Oceanography |
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Online Access: | https://oceanrep.geomar.de/id/eprint/58175/ https://oceanrep.geomar.de/id/eprint/58175/1/Damini.pdf https://doi.org/10.1016/j.pocean.2023.102985 |
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ftoceanrep:oai:oceanrep.geomar.de:58175 2024-02-11T09:57:34+01:00 Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula Yuri Damini, Brendon Rodrigo Costa, Raul Dotto, Tiago S. Rafael Borges Mendes, Carlos Camilo Torres-Lasso, Juan Azaneu, Marina do V.C. Mata, Mauricio M. Kerr, Rodrigo 2023-03 text https://oceanrep.geomar.de/id/eprint/58175/ https://oceanrep.geomar.de/id/eprint/58175/1/Damini.pdf https://doi.org/10.1016/j.pocean.2023.102985 en eng Elsevier https://oceanrep.geomar.de/id/eprint/58175/1/Damini.pdf Yuri Damini, B., Rodrigo Costa, R., Dotto, T. S., Rafael Borges Mendes, C., Camilo Torres-Lasso, J., Azaneu, M. d. V. C., Mata, M. M. and Kerr, R. (2023) Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula. Progress in Oceanography, 212 . Art.-Nr.: 102985. DOI 10.1016/j.pocean.2023.102985 <https://doi.org/10.1016/j.pocean.2023.102985>. doi:10.1016/j.pocean.2023.102985 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.1016/j.pocean.2023.102985 2024-01-15T00:26:44Z The Southern Ocean is a key region for analyzing environmental drivers that regulate sea-air CO2 exchanges. These CO2 fluxes are influenced by several mesoscale structures, such as meanders, eddies and other mechanisms responsible for energy dissipation. Aiming to better understand sea-air CO2 dynamics in the northern Antarctica Peninsula, we investigated an anticyclonic stationary eddy located south of Clarence Island, in the eastern basin of Bransfield Strait – named the Antarctica Slope Front bifurcation (ASFb) eddy. Physical, chemical and biological data were sampled, and remote sensing measurements taken, in the region during late summer conditions in February 2020. The eddy’s core consisted of cold (0.31 °C), salty (34.38) and carbon-rich (2247 μmol kg−1) waters with dissolved oxygen depletion (337 μmol kg−1). The core retains a mixture of local surface waters with waters derived from Circumpolar Deep Water (i.e., Warm Deep Water from the Weddell Sea and modified Circumpolar Deep Water from the Bransfield Strait) and Dense Shelf Water. The ASFb eddy acts as a CO2 outgassing structure that reaches a CO2 emission to the atmosphere of ∼1.5 mmol m−2 d–1 in the eddy’s core, mostly due to enhanced dissolved inorganic carbon (DIC). The results suggest that surface variation in DIC in the eddy’s core is modulated by (i) the entrainment of CO2-rich intermediate waters at ∼500 m, (ii) low primary productivity, associated with small phytoplankton cells such as cryptophytes and green flagellates, and (iii) respiration processes caused by heterotrophic organisms (i.e., zooplankton community). By providing a comprehensive view of these physical and biogeochemical properties of this stationary eddy, our results are key to adding new insights to a better understanding of the behavior of mesoscale features influencing sea-air CO2 exchanges in polar environments. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Clarence Island Southern Ocean Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Antarctic Peninsula Bransfield Strait Clarence Island ENVELOPE(-54.109,-54.109,-61.225,-61.225) Southern Ocean Weddell Weddell Sea Progress in Oceanography 212 102985 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Southern Ocean is a key region for analyzing environmental drivers that regulate sea-air CO2 exchanges. These CO2 fluxes are influenced by several mesoscale structures, such as meanders, eddies and other mechanisms responsible for energy dissipation. Aiming to better understand sea-air CO2 dynamics in the northern Antarctica Peninsula, we investigated an anticyclonic stationary eddy located south of Clarence Island, in the eastern basin of Bransfield Strait – named the Antarctica Slope Front bifurcation (ASFb) eddy. Physical, chemical and biological data were sampled, and remote sensing measurements taken, in the region during late summer conditions in February 2020. The eddy’s core consisted of cold (0.31 °C), salty (34.38) and carbon-rich (2247 μmol kg−1) waters with dissolved oxygen depletion (337 μmol kg−1). The core retains a mixture of local surface waters with waters derived from Circumpolar Deep Water (i.e., Warm Deep Water from the Weddell Sea and modified Circumpolar Deep Water from the Bransfield Strait) and Dense Shelf Water. The ASFb eddy acts as a CO2 outgassing structure that reaches a CO2 emission to the atmosphere of ∼1.5 mmol m−2 d–1 in the eddy’s core, mostly due to enhanced dissolved inorganic carbon (DIC). The results suggest that surface variation in DIC in the eddy’s core is modulated by (i) the entrainment of CO2-rich intermediate waters at ∼500 m, (ii) low primary productivity, associated with small phytoplankton cells such as cryptophytes and green flagellates, and (iii) respiration processes caused by heterotrophic organisms (i.e., zooplankton community). By providing a comprehensive view of these physical and biogeochemical properties of this stationary eddy, our results are key to adding new insights to a better understanding of the behavior of mesoscale features influencing sea-air CO2 exchanges in polar environments. |
format |
Article in Journal/Newspaper |
author |
Yuri Damini, Brendon Rodrigo Costa, Raul Dotto, Tiago S. Rafael Borges Mendes, Carlos Camilo Torres-Lasso, Juan Azaneu, Marina do V.C. Mata, Mauricio M. Kerr, Rodrigo |
spellingShingle |
Yuri Damini, Brendon Rodrigo Costa, Raul Dotto, Tiago S. Rafael Borges Mendes, Carlos Camilo Torres-Lasso, Juan Azaneu, Marina do V.C. Mata, Mauricio M. Kerr, Rodrigo Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
author_facet |
Yuri Damini, Brendon Rodrigo Costa, Raul Dotto, Tiago S. Rafael Borges Mendes, Carlos Camilo Torres-Lasso, Juan Azaneu, Marina do V.C. Mata, Mauricio M. Kerr, Rodrigo |
author_sort |
Yuri Damini, Brendon |
title |
Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
title_short |
Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
title_full |
Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
title_fullStr |
Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
title_full_unstemmed |
Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula |
title_sort |
antarctica slope front bifurcation eddy : stationary feature influencing co2 dynamics in the northern antarctic peninsula |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/58175/ https://oceanrep.geomar.de/id/eprint/58175/1/Damini.pdf https://doi.org/10.1016/j.pocean.2023.102985 |
long_lat |
ENVELOPE(-54.109,-54.109,-61.225,-61.225) |
geographic |
Antarctic Antarctic Peninsula Bransfield Strait Clarence Island Southern Ocean Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bransfield Strait Clarence Island Southern Ocean Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Clarence Island Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Bransfield Strait Clarence Island Southern Ocean Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/58175/1/Damini.pdf Yuri Damini, B., Rodrigo Costa, R., Dotto, T. S., Rafael Borges Mendes, C., Camilo Torres-Lasso, J., Azaneu, M. d. V. C., Mata, M. M. and Kerr, R. (2023) Antarctica Slope Front bifurcation eddy : stationary feature influencing CO2 dynamics in the northern Antarctic Peninsula. Progress in Oceanography, 212 . Art.-Nr.: 102985. DOI 10.1016/j.pocean.2023.102985 <https://doi.org/10.1016/j.pocean.2023.102985>. doi:10.1016/j.pocean.2023.102985 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.pocean.2023.102985 |
container_title |
Progress in Oceanography |
container_volume |
212 |
container_start_page |
102985 |
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1790593106317410304 |