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dc.contributor.authorSert, Muhammed Fatih
dc.contributor.authorNiemann, Helge
dc.contributor.authorReeves, Eoghan
dc.contributor.authorGranskog, Mats A.
dc.contributor.authorHand, Kevin P.
dc.contributor.authorKekäläinen, Timo
dc.contributor.authorJänis, Janne
dc.contributor.authorRossel, Pamela
dc.contributor.authorFerré, Benedicte
dc.contributor.authorSilyakova, Anna
dc.contributor.authorGründger, Friederike
dc.date.accessioned2022-04-27T11:43:55Z
dc.date.available2022-04-27T11:43:55Z
dc.date.issued2022-04-20
dc.description.abstractHydrothermal 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 82.9∘ N. 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 5 %–10 % 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 interactionsen_US
dc.description.sponsorshipEUen_US
dc.identifier.citationSert MF, Niemann H, Reeves E, Granskog MA, Hand KP, Kekäläinen, Jänis J, Rossel P, Ferré B, Silyakova A, Gründger F. Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean. Biogeosciences. 2022;19:2101-2120, <a href=https://doi.org/10.5194/bg-19-2101-2022>https://doi.org/10.5194/bg-19-2101-2022</a>en_US
dc.identifier.cristinIDFRIDAID 2019006
dc.identifier.doihttps://doi.org/10.5194/bg-19-2101-2022
dc.identifier.issn1726-4170
dc.identifier.issn1726-4189
dc.identifier.urihttps://hdl.handle.net/10037/24913
dc.language.isoengen_US
dc.publisherEuropean Geosciences Unionen_US
dc.publisherCopernicus Publicationsen_US
dc.relation.isbasedonSert, Muhammed Fatih; Reeves, Eoghan P.; Hand, Kevin P.; Ferré, Bénédicte, 2022, "Replication data for: Compositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Ocean", <a href=https://doi.org/10.18710/QPGDFW>https://doi.org/10.18710/QPGDFW</a>, DataverseNO, V1en
dc.relation.ispartofSert, M.F. (2022). Biogeochemistry of dissolved organic matter in Arctic Ocean waters charged with methane. (Doctoral thesis). <a href=https://hdl.handle.net/10037/27296>https://hdl.handle.net/10037/27296</a>.
dc.relation.journalBiogeosciences
dc.relation.projectIDNorges forskningsråd: 274330en_US
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/ERC/H2020/856416/EU/DEEP PURPLE: darkening of the Greenland Ice Sheet//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/ERC/H2020/731077/EU/European Network of Fourier-Transform Ion-Cyclotron-Resonance Mass Spectrometry Centers/EU_FT-ICR_MS/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleCompositions of dissolved organic matter in the ice-covered waters above the Aurora hydrothermal vent system, Gakkel Ridge, Arctic Oceanen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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