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dc.contributor.authorWollenburg, JE
dc.contributor.authorKatlein, C
dc.contributor.authorNehrke, Gernot
dc.contributor.authorNöthig, E.-M
dc.contributor.authorMatthiessen, J
dc.contributor.authorWolf-Gladrow, Dieter A.
dc.contributor.authorNikolopoulos, A.
dc.contributor.authorGazquez-Sanchez, F
dc.contributor.authorRossmann, L
dc.contributor.authorAssmy, Philipp
dc.contributor.authorBabin, Marcel
dc.contributor.authorBruyant, F
dc.contributor.authorBeaulieu, Michaël
dc.contributor.authorDybwad, Christine
dc.contributor.authorPeeken, Ilka
dc.date.accessioned2018-11-27T13:23:20Z
dc.date.available2018-11-27T13:23:20Z
dc.date.issued2018-05-16
dc.description.abstractMineral ballasting enhances carbon export from the surface to the deep ocean; however, little is known about the role of this process in the ice-covered Arctic Ocean. Here, we propose gypsum ballasting as a new mechanism that likely facilitated enhanced vertical carbon export from an under-ice phytoplankton bloom dominated by the haptophyte Phaeocystis. In the spring 2015 abundant gypsum crystals embedded in Phaeocystis aggregates were collected throughout the water column and on the sea floor at a depth below 2 km. Model predictions supported by isotopic signatures indicate that 2.7 g m−2 gypsum crystals were formed in sea ice at temperatures below −6.5 °C and released into the water column during sea ice melting. Our finding indicates that sea ice derived (cryogenic) gypsum is stable enough to survive export to the deep ocean and serves as an effective ballast mineral. Our findings also suggest a potentially important and previously unknown role of Phaeocystis in deep carbon export due to cryogenic gypsum ballasting. The rapidly changing Arctic sea ice regime might favour this gypsum gravity chute with potential consequences for carbon export and food partitioning between pelagic and benthic ecosystemsen_US
dc.description.sponsorshipPACES (Polar Regions and Coasts in a Changing Earth System) Helmholtz Association Polarinstituttet - ICEen_US
dc.descriptionSource at <a href=https://doi.org/10.1038/s41598-018-26016-0> https://doi.org/10.1038/s41598-018-26016-0</a>.en_US
dc.identifier.citationWollenburg, J.E., Katlein, C., Nehrke, G., Nöthig, E.-M., Matthiessen, J., Wolf-Gladrow, D.A., ... Peeken, I. (2018). Ballasting by cryogenic gypsum enhances carbon export in a <i>Phaeocystis</i> under-ice bloom. <i>Scientific Reports</i>, 8(1). https://doi.org/10.1038/s41598-018-26016-0en_US
dc.identifier.issn2045-2322
dc.identifier.otherFRIDAID 1623479
dc.identifier.other10.1038/s41598-018-26016-0
dc.identifier.urihttps://hdl.handle.net/10037/14246
dc.language.isoengen_US
dc.publisherNature Researchen_US
dc.relation.journalScientific Reports
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/244646/Norway/Ice-algal and under-ice phytoplankton bloom dynamics in a changing Arctic icescape//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.titleBallasting by cryogenic gypsum enhances carbon export in a Phaeocystis under-ice bloomen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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