Replication Data for: Reduced methane seepage from Arctic sediments during cold bottom-water conditions

Version 3.3

Ferré, Bénédicte; Jansson, Pär; Moser, Manuel; Serov, Pavel; Portnov, Alexei; Graves, Carolyn; Panieri, Giuliana; Gründger, Friederike; Berndt, Christian; Lehmann, Moritz F; Niemann, Helge, 2019, "Replication Data for: Reduced methane seepage from Arctic sediments during cold bottom-water conditions", https://doi.org/10.18710/EIFZ2J, DataverseNO, V3, UNF:6:tZnvI4jmCq7dHtQ/8XFbww== [fileUNF]

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Description	This dataset contains all the necessary data for reproducing the results in the article. "Reduced methane seepage from Arctic sediments during cold bottom-water conditions" (2020-10-28) Abstract: Large amounts of methane are trapped within sub-seabed sediments in the Arctic ocean. Seasonal bottom water warming may induce the release of methane from the seafloor, yet methane seepage surveys mainly occur in summer. Here, we compare the seepage activity along the gas hydrate stability limit offshore Svalbard between cold and warm seasons. Hydro-acoustic surveys revealed decreased seepage activity during cold bottom water conditions, with 43 % fewer flares and methane release rates than under warmer conditions. For the first time, we demonstrate that cold seeps “hibernate” during cold seasons when more free methane gas becomes trapped in the sub-seabed sediments. Such a greenhouse gas capacitor increases the potential for methane release during summer months. Seasonal bottom water temperature variations are common in the Arctic continental shelves, and thus methane-seep hibernation is likely a widespread phenomenon underappreciated in previous global methane budgets. (2019-09-23)
Subject	Earth and Environmental Sciences
Keyword	Methane, Cold seep, Variability, Arctic, Microbial oxidation, Flare, Backscatter, Ocean, Seasonal
Related Publication	Ferré, B., Jansson, P.G., Moser, M. et al. (2020) Reduced methane seepage from Arctic sediments during cold bottom-water conditions. Nature Geoscience 13, 144–148 (2020).doi: 10.1038/s41561-019-0515-3
License/Data Use Agreement	CC0 1.0

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Citation Metadata

Persistent Identifier	doi:10.18710/EIFZ2J
Publication Date	2019-09-30
Title	Replication Data for: Reduced methane seepage from Arctic sediments during cold bottom-water conditions
Author	UiT The Arctic University of Norway0000-0003-1646-9287 UiT The Arctic University of Norway0000-0002-6729-9428 UiT The Arctic University of Norway0000-0002-3135-3365 UiT The Arctic University of Norway0000-0001-6417-9941 The Ohio State University0000-0003-4930-8308 Baltic Sea Research Institute, IOW, Germany0000-0003-3050-7702 UiT The Arctic University of Norway0000-0001-9411-1729 UiT The Arctic University of Norway0000-0002-7386-3603 GEOMAR Helmholtz Centre for Ocean Research, Kiel, Germany0000-0001-5055-0180 University of Basel0000-0003-0626-5942 University of Basel0000-0002-3468-8304
Point of Contact	Use email button above to contact. Ferré, Bénédicte (UiT The Arctic University of Norway)
Description	This dataset contains all the necessary data for reproducing the results in the article. "Reduced methane seepage from Arctic sediments during cold bottom-water conditions" (2020-10-28) Abstract: Large amounts of methane are trapped within sub-seabed sediments in the Arctic ocean. Seasonal bottom water warming may induce the release of methane from the seafloor, yet methane seepage surveys mainly occur in summer. Here, we compare the seepage activity along the gas hydrate stability limit offshore Svalbard between cold and warm seasons. Hydro-acoustic surveys revealed decreased seepage activity during cold bottom water conditions, with 43 % fewer flares and methane release rates than under warmer conditions. For the first time, we demonstrate that cold seeps “hibernate” during cold seasons when more free methane gas becomes trapped in the sub-seabed sediments. Such a greenhouse gas capacitor increases the potential for methane release during summer months. Seasonal bottom water temperature variations are common in the Arctic continental shelves, and thus methane-seep hibernation is likely a widespread phenomenon underappreciated in previous global methane budgets. (2019-09-23)
Subject	Earth and Environmental Sciences
Keyword	Methane Cold seep Variability Arctic Microbial oxidation Flare Backscatter Ocean Seasonal
Related Publication	Ferré, B., Jansson, P.G., Moser, M. et al. (2020) Reduced methane seepage from Arctic sediments during cold bottom-water conditions. Nature Geoscience 13, 144–148 (2020). doi 10.1038/s41561-019-0515-3 https://doi.org/10.1038/s41561-019-0515-3
Language	English
Producer	UiT The Arctic University of Norway (UiT) https://en.uit.no/
Production Date	2016-05-08
Production Location	West of Svalbard
Funding Information	Norwegian Research Council: 223259
Distributor	UiT The Arctic University of Norway (UiT The Arctic University of Norway) https://dataverse.no/dataverse/uit
Depositor	Jansson, Pär
Deposit Date	2019-09-23
Time Period	Start Date: 2016-05-06; End Date: 2016-05-08
Date of Collection	Start Date: 2016-05-06; End Date: 2016-05-08
Data Type	Water temperature; Salinity; Pressure/ Depth; Methane free gas flow rate; Methane concentration; Methane oxidation rates

Geospatial Metadata

Geographic Coverage	Svalbard and Jan Mayen
Geographic Bounding Box	9.333333 9.666667 78.666667 78.5

Journal Metadata

Journal	Nature Geoscience
Type of Article	research article

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Creative Commons CC0 1.0 Universal Public Domain Dedication. CC0 1.0

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