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dc.contributor.authorFransson, Agneta
dc.contributor.authorChierici, Melissa
dc.contributor.authorNomura, Daiki
dc.contributor.authorGranskog, Mats
dc.contributor.authorKristiansen, Svein
dc.contributor.authorMartma, Tõnu
dc.contributor.authorNehrke, Gernot
dc.date.accessioned2020-11-25T10:19:16Z
dc.date.available2020-11-25T10:19:16Z
dc.date.created2020-11-18T13:32:56Z
dc.date.issued2020
dc.identifier.citationAnnals of Glaciology. 2020, 1-21.en_US
dc.identifier.issn0260-3055
dc.identifier.urihttps://hdl.handle.net/11250/2689523
dc.description.abstractThe effect of freshwater sources on wintertime sea-ice CO2 processes was studied from the glacier front to the outer Tempelfjorden, Svalbard, in sea ice, glacier ice, brine and snow. March–April 2012 was mild, and the fjord was mainly covered with drift ice, in contrast to the observed thicker fast ice in the colder April 2013. This resulted in different physical and chemical properties of the sea ice and under-ice water. Data from stable oxygen isotopic ratios and salinity showed that the sea ice at the glacier front in April 2012 contained on average 54% of frozen-in glacial meltwater. This was five times higher than in April 2013, where the ice was frozen seawater. In April 2012, the largest excess of sea-ice total alkalinity (AT), carbonate ion ([CO32−]) and bicarbonate ion concentrations ([HCO3−]) relative to salinity was mainly related to dissolved dolomite and calcite incorporated during freezing of mineral-enriched glacial water. In April 2013, the excess of these variables was mainly due to ikaite dissolution as a result of sea-ice processes. Dolomite dissolution increased sea-ice AT twice as much as ikaite and calcite dissolution, implying different buffering capacity and potential for ocean CO2 uptake in a changing climate.en_US
dc.language.isoengen_US
dc.titleInfluence of glacial water and carbonate minerals on wintertime sea-ice biogeochemistry and the CO2 system in an Arctic fjord in Svalbarden_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber1-21en_US
dc.source.journalAnnals of Glaciologyen_US
dc.identifier.doi10.1017/aog.2020.52
dc.identifier.cristin1849262
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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