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dc.contributor.authorPortnov, Aleksei D
dc.contributor.authorMienert, Jürgen
dc.contributor.authorWinsborrow, Monica
dc.contributor.authorAndreassen, Karin
dc.contributor.authorVadakkepuliyambatta, Sunil
dc.contributor.authorSemenov, Peter
dc.contributor.authorGataullin, Valery
dc.date.accessioned2018-09-26T08:06:52Z
dc.date.available2018-09-26T08:06:52Z
dc.date.issued2018-09-25
dc.description.abstractGeophysical data from the South Kara Sea reveal U-shaped erosional structures buried beneath the 50–250 m deep seafloor of the continental shelf across an area of ~32 000 km<sup>2</sup>. These structures are interpreted as thermokarst, formed in ancient yedoma terrains during Quaternary interglacial periods. Based on comparison to modern yedoma terrains, we suggest that these thermokarst features could have stored approximately 0.5 to 8 Gt carbon during past climate warmings. In the deeper parts of the South Kara Sea (>220 m water depth) the paleo thermokarst structures lie within the present day gas hydrate stability zone, with low bottom water temperatures −1.8<sup>o</sup>C) keeping the gas hydrate system in equilibrium. These thermokarst structures and their carbon reservoirs remain stable beneath a Quaternary sediment blanket, yet are potentially sensitive to future Arctic climate changes.en_US
dc.descriptionSource at <a href=https://doi.org/10.1038/s41598-018-32826-z> https://doi.org/10.1038/s41598-018-32826-z</a>.en_US
dc.identifier.citationPortnov, A.D., Mienert, J., Winsborrow, M., Andreassen, K., Vadakkepuliyambatta, S., Semenov, P. & Gataullin, V. (2018). Shallow carbon storage in ancient buried thermokarst in the South Kara Sea. Scientific Reports, 8(14342). https://doi.org/10.1038/s41598-018-32826-zen_US
dc.identifier.cristinIDFRIDAID 1613435
dc.identifier.doi10.1038/s41598-018-32826-z
dc.identifier.issn2045-2322
dc.identifier.urihttps://hdl.handle.net/10037/13867
dc.language.isoengen_US
dc.publisherNature Researchen_US
dc.relation.journalScientific Reports
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titleShallow carbon storage in ancient buried thermokarst in the South Kara Seaen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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