Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1)
Methane seepage from the upper continental slopes of Western Svalbard has previously been attributed to gas hydrate dissociation induced by anthropogenic warming of ambient bottom waters. Here we show that sediment cores drilled off Prins Karls Foreland contain freshwater from dissociating hydrates....
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ftdatacite:10.1594/pangaea.890469 2023-05-15T18:29:38+02:00 Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) Pape, Thomas Malnati, Janice Bohrmann, Gerhard 2018 application/zip https://dx.doi.org/10.1594/pangaea.890469 https://doi.pangaea.de/10.1594/PANGAEA.890469 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1038/s41467-017-02550-9 https://dx.doi.org/10.1002/2017gc007288 Creative Commons Attribution Non Commercial Share Alike 3.0 Unported https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode cc-by-nc-sa-3.0 CC-BY-NC-SA Center for Marine Environmental Sciences MARUM Supplementary Collection of Datasets Collection article 2018 ftdatacite https://doi.org/10.1594/pangaea.890469 https://doi.org/10.1038/s41467-017-02550-9 https://doi.org/10.1002/2017gc007288 2022-02-08T16:24:46Z Methane seepage from the upper continental slopes of Western Svalbard has previously been attributed to gas hydrate dissociation induced by anthropogenic warming of ambient bottom waters. Here we show that sediment cores drilled off Prins Karls Foreland contain freshwater from dissociating hydrates. However, our modeling indicates that the observed pore water freshening began around 8 ka BP when the rate of isostatic uplift outpaced eustatic sea-level rise. The resultant local shallowing and lowering of hydrostatic pressure forced gas hydrate dissociation and dissolved chloride depletions consistent with our geochemical analysis. Hence, we propose that hydrate dissociation was triggered by postglacial isostatic rebound rather than anthropogenic warming. Furthermore, we show that methane fluxes from dissociating hydrates were considerably smaller than present methane seepage rates implying that gas hydrates were not a major source of methane to the oceans, but rather acted as a dynamic seal, regulating methane release from deep geological reservoirs. Article in Journal/Newspaper Svalbard DataCite Metadata Store (German National Library of Science and Technology) Andreassen ENVELOPE(-57.769,-57.769,-63.899,-63.899) Christiane ENVELOPE(70.233,70.233,-49.350,-49.350) Klaus ENVELOPE(24.117,24.117,65.717,65.717) Svalbard |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Center for Marine Environmental Sciences MARUM |
spellingShingle |
Center for Marine Environmental Sciences MARUM Pape, Thomas Malnati, Janice Bohrmann, Gerhard Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
topic_facet |
Center for Marine Environmental Sciences MARUM |
description |
Methane seepage from the upper continental slopes of Western Svalbard has previously been attributed to gas hydrate dissociation induced by anthropogenic warming of ambient bottom waters. Here we show that sediment cores drilled off Prins Karls Foreland contain freshwater from dissociating hydrates. However, our modeling indicates that the observed pore water freshening began around 8 ka BP when the rate of isostatic uplift outpaced eustatic sea-level rise. The resultant local shallowing and lowering of hydrostatic pressure forced gas hydrate dissociation and dissolved chloride depletions consistent with our geochemical analysis. Hence, we propose that hydrate dissociation was triggered by postglacial isostatic rebound rather than anthropogenic warming. Furthermore, we show that methane fluxes from dissociating hydrates were considerably smaller than present methane seepage rates implying that gas hydrates were not a major source of methane to the oceans, but rather acted as a dynamic seal, regulating methane release from deep geological reservoirs. |
format |
Article in Journal/Newspaper |
author |
Pape, Thomas Malnati, Janice Bohrmann, Gerhard |
author_facet |
Pape, Thomas Malnati, Janice Bohrmann, Gerhard |
author_sort |
Pape, Thomas |
title |
Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
title_short |
Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
title_full |
Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
title_fullStr |
Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
title_full_unstemmed |
Porosity and methane stable carbon isotope values of MeBo sediment cores from the continental margin off Svalbard - cruise MSM57, supplement to: Wallmann, Klaus; Riedel, Michael; Hong, W L; Patton, H; Hubbard, Alun L; Pape, Thomas; Hsu, Chieh-Wei; Schmidt, Christiane; Johnson, J E; Torres, Marta E; Andreassen, Karin; Berndt, Christian; Bohrmann, Gerhard (2018): Gas hydrate dissociation off Svalbard induced by isostatic rebound rather than global warming. Nature Communications, 9(1) |
title_sort |
porosity and methane stable carbon isotope values of mebo sediment cores from the continental margin off svalbard - cruise msm57, supplement to: wallmann, klaus; riedel, michael; hong, w l; patton, h; hubbard, alun l; pape, thomas; hsu, chieh-wei; schmidt, christiane; johnson, j e; torres, marta e; andreassen, karin; berndt, christian; bohrmann, gerhard (2018): gas hydrate dissociation off svalbard induced by isostatic rebound rather than global warming. nature communications, 9(1) |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2018 |
url |
https://dx.doi.org/10.1594/pangaea.890469 https://doi.pangaea.de/10.1594/PANGAEA.890469 |
long_lat |
ENVELOPE(-57.769,-57.769,-63.899,-63.899) ENVELOPE(70.233,70.233,-49.350,-49.350) ENVELOPE(24.117,24.117,65.717,65.717) |
geographic |
Andreassen Christiane Klaus Svalbard |
geographic_facet |
Andreassen Christiane Klaus Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_relation |
https://dx.doi.org/10.1038/s41467-017-02550-9 https://dx.doi.org/10.1002/2017gc007288 |
op_rights |
Creative Commons Attribution Non Commercial Share Alike 3.0 Unported https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode cc-by-nc-sa-3.0 |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.1594/pangaea.890469 https://doi.org/10.1038/s41467-017-02550-9 https://doi.org/10.1002/2017gc007288 |
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1766212833030176768 |