Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean
Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venti...
Published in: | Biogeosciences |
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2022
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ftuniaarhuspubl:oai:pure.atira.dk:publications/8a84d144-ed99-4e9f-984d-c3bfb11b1678 2024-05-19T07:33:22+00:00 Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean Sert, Muhammed Fatih Niemann, Helge Reeves, Eoghan P. Granskog, Mats A. Hand, Kevin P. Kekäläinen, Timo Jänis, Janne Rossel, Pamela E. Ferré, Bénédicte Silyakova, Anna Gründger, Friederike 2022-04 https://pure.au.dk/portal/en/publications/8a84d144-ed99-4e9f-984d-c3bfb11b1678 https://doi.org/10.5194/bg-19-2101-2022 http://www.scopus.com/inward/record.url?scp=85129305966&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/8a84d144-ed99-4e9f-984d-c3bfb11b1678 info:eu-repo/semantics/openAccess Sert , M F , Niemann , H , Reeves , E P , Granskog , M A , Hand , K P , Kekäläinen , T , Jänis , J , Rossel , P E , Ferré , B , Silyakova , A & Gründger , F 2022 , ' Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean ' , Biogeosciences , vol. 19 , no. 8 , pp. 2101-2120 . https://doi.org/10.5194/bg-19-2101-2022 article 2022 ftuniaarhuspubl https://doi.org/10.5194/bg-19-2101-2022 2024-05-01T23:48:43Z Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venting hydrothermal sites in the oceans, their contribution to the oceanic DOM pool may be substantial. Here, we investigate the dynamics of DOM in relation to hydrothermal venting and related processes at the as yet unexplored Aurora hydrothermal vent field within the ultraslow-spreading Gakkel Ridge in the Arctic Ocean at 82.9g gN. We examined the vertical distribution of DOM composition from sea ice to deep waters at six hydrocast stations distal to the active vent and its neutrally buoyant plume layer. In comparison to background seawater, we found that the DOM in waters directly affected by the hydrothermal plume was molecularly less diverse and 5g%-10g% lower in number of molecular formulas associated with the molecular categories related to lipid and protein-like compounds. On the other hand, samples that were not directly affected by the plume were chemically more diverse and had a higher percentage of chemical formulas associated with the carbohydrate-like category. Our results suggest that hydrothermal processes at Aurora may influence the DOM distribution in the bathypelagic ocean by spreading more thermally and/or chemically induced compositions, while DOM compositions in epipelagic and mesopelagic layers are mainly governed by the microbial carbon pump dynamics and surface-ocean-sea-ice interactions. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Sea ice ice covered waters Aarhus University: Research Biogeosciences 19 8 2101 2120 |
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Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
Hydrothermal vents modify and displace subsurface dissolved organic matter (DOM) into the ocean. Once in the ocean, this DOM is transported together with elements, particles, dissolved gases and biomass along with the neutrally buoyant plume layer. Considering the number and extent of actively venting hydrothermal sites in the oceans, their contribution to the oceanic DOM pool may be substantial. Here, we investigate the dynamics of DOM in relation to hydrothermal venting and related processes at the as yet unexplored Aurora hydrothermal vent field within the ultraslow-spreading Gakkel Ridge in the Arctic Ocean at 82.9g gN. We examined the vertical distribution of DOM composition from sea ice to deep waters at six hydrocast stations distal to the active vent and its neutrally buoyant plume layer. In comparison to background seawater, we found that the DOM in waters directly affected by the hydrothermal plume was molecularly less diverse and 5g%-10g% lower in number of molecular formulas associated with the molecular categories related to lipid and protein-like compounds. On the other hand, samples that were not directly affected by the plume were chemically more diverse and had a higher percentage of chemical formulas associated with the carbohydrate-like category. Our results suggest that hydrothermal processes at Aurora may influence the DOM distribution in the bathypelagic ocean by spreading more thermally and/or chemically induced compositions, while DOM compositions in epipelagic and mesopelagic layers are mainly governed by the microbial carbon pump dynamics and surface-ocean-sea-ice interactions. |
format |
Article in Journal/Newspaper |
author |
Sert, Muhammed Fatih Niemann, Helge Reeves, Eoghan P. Granskog, Mats A. Hand, Kevin P. Kekäläinen, Timo Jänis, Janne Rossel, Pamela E. Ferré, Bénédicte Silyakova, Anna Gründger, Friederike |
spellingShingle |
Sert, Muhammed Fatih Niemann, Helge Reeves, Eoghan P. Granskog, Mats A. Hand, Kevin P. Kekäläinen, Timo Jänis, Janne Rossel, Pamela E. Ferré, Bénédicte Silyakova, Anna Gründger, Friederike Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
author_facet |
Sert, Muhammed Fatih Niemann, Helge Reeves, Eoghan P. Granskog, Mats A. Hand, Kevin P. Kekäläinen, Timo Jänis, Janne Rossel, Pamela E. Ferré, Bénédicte Silyakova, Anna Gründger, Friederike |
author_sort |
Sert, Muhammed Fatih |
title |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_short |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_full |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_fullStr |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_full_unstemmed |
Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean |
title_sort |
compositions of dissolved organic matter in the ice-covered waters above the aurora hydrothermal vent system, gakkel ridge, arctic ocean |
publishDate |
2022 |
url |
https://pure.au.dk/portal/en/publications/8a84d144-ed99-4e9f-984d-c3bfb11b1678 https://doi.org/10.5194/bg-19-2101-2022 http://www.scopus.com/inward/record.url?scp=85129305966&partnerID=8YFLogxK |
genre |
Arctic Arctic Arctic Ocean Sea ice ice covered waters |
genre_facet |
Arctic Arctic Arctic Ocean Sea ice ice covered waters |
op_source |
Sert , M F , Niemann , H , Reeves , E P , Granskog , M A , Hand , K P , Kekäläinen , T , Jänis , J , Rossel , P E , Ferré , B , Silyakova , A & Gründger , F 2022 , ' Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean ' , Biogeosciences , vol. 19 , no. 8 , pp. 2101-2120 . https://doi.org/10.5194/bg-19-2101-2022 |
op_relation |
https://pure.au.dk/portal/en/publications/8a84d144-ed99-4e9f-984d-c3bfb11b1678 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-19-2101-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
8 |
container_start_page |
2101 |
op_container_end_page |
2120 |
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1799471428694704128 |