{"refrec":{"BRefID":246792,"RR":"<b>Moreau, S.; Vancoppenolle, M.; Delille, B.; Tison, J.-L.; Zhou, J.; Kotovitch, M.; Thomas, N; Geilfus, X; Goosse, H.</b> (2015). Drivers of inorganic carbon dynamics in first-year sea ice: a model study. <i>J. Geophys. Res. Oceans(120)</i>: 471-495. <a href=\"http://dx.doi.org/10.1002/2014JC010388\" target=\"_blank\">dx.doi.org/10.1002/2014JC010388</a>","BEntID":238492,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>J. Geophys. Res. Oceans(120)</i>: 471-495. <a href=\"https://dx.doi.org/10.1002/2014JC010388\" target=\"_blank\">https://dx.doi.org/10.1002/2014JC010388</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Moreau, S.; Vancoppenolle, M.; Delille, B.; Tison, J.-L.; Zhou, J.; Kotovitch, M.; Thomas, N; Geilfus, X; Goosse, H.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Moreau, S. <i>et al.</i>","Englishabstract":"Sea ice is an active source or a sink for carbon dioxide (CO<sub>2</sub>), although to what extent is not clear. Here, we analyze CO<sub>2</sub> dynamics within sea ice using a one-dimensional halothermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. Carbonate chemistry, the consumption, and release of CO<sub>2</sub> by primary production and respiration, the precipitation and dissolution of ikaite (CaCO<sub>3</sub>·6H<sub>2</sub>O) and ice-air CO<sub>2</sub> fluxes, are also included. The model is evaluated using observations from a 6 month field study at Point Barrow, Alaska, and an ice-tank experiment. At Barrow, results show that the DIC budget is mainly driven by physical processes, wheras brine-air CO<sub>2</sub> fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO<sub>2</sub> exchanges, sea ice is a net CO<sub>2</sub> source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO<sub>2</sub> flux impacts the simulated near-surface CO<sub>2</sub> partial pressure (<i>p</i>CO<sub>2</sub>), but not the DIC budget. Because the simulated ice-atmosphere CO<sub>2</sub> fluxes are limited by DIC stocks, and therefore <2 mmol m<sup>-2</sup> d<sup>-1</sup>, we argue that the observed much larger CO<sub>2</sub> fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO<sub>2</sub>. Finally, the simulations suggest that near-surface TA/DIC ratios of ~2, sometimes used as an indicator of calcification, would rather suggest outgassing.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Drivers of inorganic carbon dynamics in first-year sea ice: a model study","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"biogeochemistry; sea ice; modeling","OtherDescriptors":null,"Notes":null,"AnaPub":2015,"MonPub":null,"DateUpdate":"2015-10-28","DateCreate":"2015-05-21","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000349890000028","VABBcode":null,"OpenAcc":0,"DOI":"10.1002/2014JC010388"},"refs":null,"anarec":{"AnaID":246792,"PubliDate":2015,"Pagination":"471-495","XtraPublOfAnaID":null,"ISBN":null,"Volume":"Oceans","Issue":"120","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":90908,"SerRR":"Journal of Geophysical Research. American Geophysical Union: Richmond.  ISSN 0148-0227; e-ISSN 2156-2202","StandardTitleSer":"Journal of Geophysical Research","ISSN":"0148-0227","AbbrevSer":"J. Geophys. 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