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dc.contributor.authorStein, Ruediger
dc.contributor.authorFahl, Kirsten
dc.contributor.authorSchreck, Michael
dc.contributor.authorKnorr, Gregor
dc.contributor.authorNiessen, Frank
dc.contributor.authorForwick, Matthias
dc.contributor.authorGebhardt, Catalina
dc.contributor.authorJensen, Laura
dc.contributor.authorKaminski, Michael
dc.contributor.authorKopf, Achim
dc.contributor.authorMatthiessen, Jens
dc.contributor.authorJokat, Wilfried
dc.contributor.authorLohmann, Gerrit
dc.date.accessioned2017-03-15T12:04:41Z
dc.date.available2017-03-15T12:04:41Z
dc.date.issued2016-04-04
dc.description.abstractAlthough the permanently to seasonally ice-covered Arctic Ocean is a unique and sensitive component in the Earth’s climate system, the knowledge of its long-term climate history remains very limited due to the restricted number of pre-Quaternary sedimentary records. During Polarstern Expedition PS87/2014, we discovered multiple submarine landslides along Lomonosov Ridge. Removal of younger sediments from steep headwalls has led to exhumation of Miocene sediments close to the seafloor. Here we document the presence of IP25 as a proxy for spring sea-ice cover and alkenone-based summer sea-surface temperatures 44 °C that support a seasonal sea-ice cover with an ice-free summer season being predominant during the late Miocene in the central Arctic Ocean. A comparison of our proxy data with Miocene climate simulations seems to favour either relatively high late Miocene atmospheric CO2 concentrations and/or a weak sensitivity of the model to simulate the magnitude of high-latitude warming in a warmer than modern climate.en_US
dc.descriptionPublished version. Source at <a href=http://dx.doi.org/10.1038/ncomms11148> http://dx.doi.org/10.1038/ncomms11148 </a>en_US
dc.identifier.citationStein R. et.al.: Evidence for ice-free summers in the late Miocene central Arctic Ocean. Nature Communications. 2016;7en_US
dc.identifier.cristinIDFRIDAID 1417330
dc.identifier.doi10.1038/ncomms11148
dc.identifier.issn2041-1723
dc.identifier.urihttps://hdl.handle.net/10037/10694
dc.language.isoengen_US
dc.publisherNature Publishing Groupen_US
dc.relation.journalNature Communications
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.titleEvidence for ice-free summers in the late Miocene central Arctic Oceanen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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