Vis enkel innførsel

dc.contributor.authorNomura, Daiki
dc.contributor.authorGranskog, Mats A.
dc.contributor.authorFransson, Agneta
dc.contributor.authorChierici, Melissa
dc.contributor.authorSilyakova, Anna
dc.contributor.authorOhshima, Kay
dc.contributor.authorCohen, Lana
dc.contributor.authorDelille, Bruno
dc.contributor.authorHudson, Stephen R.
dc.contributor.authorDieckmann, Gerhard
dc.date.accessioned2018-06-22T10:47:30Z
dc.date.available2018-06-22T10:47:30Z
dc.date.issued2018-06-05
dc.description.abstractRare CO2 flux measurements from Arctic pack ice show that two types of ice contribute to the release of CO2 from the ice to the atmosphere during winter and spring: young, thin ice with a thin layer of snow and older (several weeks), thicker ice with thick snow cover. Young, thin sea ice is characterized by high salinity and high porosity, and snow-covered thick ice remains relatively warm ( >  −7.5 °C) due to the insulating snow cover despite air temperatures as low as −40 °C. Therefore, brine volume fractions of these two ice types are high enough to provide favorable conditions for gas exchange between sea ice and the atmosphere even in mid-winter. Although the potential CO2 flux from sea ice decreased due to the presence of the snow, the snow surface is still a CO2 source to the atmosphere for low snow density and thin snow conditions. We found that young sea ice that is formed in leads without snow cover produces CO2 fluxes an order of magnitude higher than those in snow-covered older ice (+1.0 ± 0.6 mmol C m−2 day−1 for young ice and +0.2 ± 0.2 mmol C m−2 day−1 for older ice).en_US
dc.description.sponsorshipJapan Society for the Promotion of Science Climate and Ecosystems (ICE) at the Norwegian Polar Institute Ministry of Climate and Environment of Norway Ministry of Foreign Affairs of Norway Joint Research Program of the Institute of Low Temperature Science Hokkaido University Grant for Arctic Challenge for Sustainability FRAM-High North Research Centre for Climate and the Environmenten_US
dc.descriptionSource at <a href=https://doi.org/10.5194/bg-15-3331-2018> https://doi.org/10.5194/bg-15-3331-2018</a>.en_US
dc.identifier.citationNomura, D., Granskog, M.A., Fransson, A., Chierici, M., Silyakova, A., Ohshima, K., ... Dieckmann, G. (2018). CO2 flux over young and snow-covered Arctic pack ice in winter and spring. Biogeosciences, 15(11), 3331-3343.en_US
dc.identifier.cristinIDFRIDAID 1589834
dc.identifier.doi10.5194/bg-15-3331-2018
dc.identifier.issn1726-4170
dc.identifier.issn1726-4189
dc.identifier.urihttps://hdl.handle.net/10037/12970
dc.language.isoengen_US
dc.publisherEuropean Geosciences Union (EGU)en_US
dc.relation.journalBiogeosciences
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/240639/Norway/Greenhouse Gas Fluxes from Arctic Sea Ice//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.titleCO2 flux over young and snow-covered Arctic pack ice in winter and springen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel