{"refrec":{"BRefID":337830,"RR":"<b>Van der Linden, F.C.; Tison, J.-L.; Champenois, W.; Moreau, S.; Carnat, G.; Kotovitch, M.; Fripiat, F.; Deman, F.; Roukaerts, A.; Dehairs, F.; Wauthy, S.; Lourenço, A.; Vivier, F.; Haskell, T.; Delille, B.</b> (2020). Sea ice CO<sub>2</sub> dynamics across seasons: impact of processes at the interfaces. <i>JGR: Oceans 125(6)</i>: e2019JC015807. <a href=\"https://hdl.handle.net/10.1029/2019JC015807\" target=\"_blank\">https://hdl.handle.net/10.1029/2019JC015807</a>","BEntID":334454,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>JGR: Oceans 125(6)</i>: e2019JC015807. <a href=\"https://hdl.handle.net/10.1029/2019JC015807\" target=\"_blank\">https://hdl.handle.net/10.1029/2019JC015807</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Van der Linden, F.C.; Tison, J.-L.; Champenois, W.; Moreau, S.; Carnat, G.; Kotovitch, M.; Fripiat, F.; Deman, F.; Roukaerts, A.; Dehairs, F.; Wauthy, S.; Lourenço, A.; Vivier, F.; Haskell, T.; Delille, B.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Van der Linden, F.C. <i>et al.</i>","Englishabstract":"Winter to summer CO<sub>2</sub> dynamics within landfast sea ice in McMurdo Sound (Antarctica) were investigated using bulk ice pCO<sub>2</sub> measurements, air-snow-ice CO<sub>2</sub> fluxes, dissolved inorganic carbon (DIC), total alkalinity (TA), and ikaite saturation state. Our results suggest depth-dependent biotic and abiotic controls that led us to discriminate the ice column in three layers. At the surface, winter pCO<sub>2</sub> supersaturation drove CO<sub>2</sub> release to the atmosphere while spring-summer pCO<sub>2</sub> undersaturation led to CO<sub>2</sub> uptake most of the time. CO<sub>2</sub> fluxes showed a diel pattern superimposed upon this seasonal pattern which was potentially assigned to either ice skin freeze-thaw cycles or diel changes in net community production. In the ice interior, the pCO<sub>2</sub> decrease across the season was driven by physical processes, mainly independent of the autotrophic and heterotrophic phases. Bottom sea ice was characterized by a massive biomass build-up counterintuitively associated with transient heterotrophic activity and nitrate plus nitrite accumulation. This inconsistency is likely related to the formation of a biofilm. 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