{"refrec":{"BRefID":363046,"RR":"<b>Moreau, S.; Lannuzel, D.; Janssens, J.; Arroyo, M.C.; Corkill, M.; Cougnon, E.; Genovese, C.; Legresy, B.; Lenton, A.; Puigcorbe, V.; Ratnarajah, L.; Rintoul, S.; Roca-Marti, M.; Rosenberg, M.; Shadwick, E.H.; Silvano, A.; Strutton, P.G.; Tilbrook, B.</b> (2019). Sea ice meltwater and circumpolar deep water drive contrasting productivity in three Antarctic polynyas. <i>JGR: Oceans 124(5)</i>: 2943-2968. <a href=\"https://dx.doi.org/10.1029/2019JC015071\" target=\"_blank\">https://dx.doi.org/10.1029/2019JC015071</a>","BEntID":360764,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>JGR: Oceans 124(5)</i>: 2943-2968. <a href=\"https://dx.doi.org/10.1029/2019JC015071\" target=\"_blank\">https://dx.doi.org/10.1029/2019JC015071</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Moreau, S.; Lannuzel, D.; Janssens, J.; Arroyo, M.C.; Corkill, M.; Cougnon, E.; Genovese, C.; Legresy, B.; Lenton, A.; Puigcorbe, V.; Ratnarajah, L.; Rintoul, S.; Roca-Marti, M.; Rosenberg, M.; Shadwick, E.H.; Silvano, A.; Strutton, P.G.; Tilbrook, B.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Moreau, S. <i>et al.</i>","Englishabstract":"In the Southern Ocean, polynyas exhibit enhanced rates of primary productivity and represent large seasonal sinks for atmospheric CO<sub>2</sub>. Three contrasting east Antarctic polynyas were visited in late December to early January 2017: the Dalton, Mertz, and Ninnis polynyas. In the Mertz and Ninnis polynyas, phytoplankton biomass (average of 322 and 354&nbsp;mg chlorophyll <i>a</i> (Chl <i>a</i>)/m<sup>2</sup>, respectively) and net community production (5.3 and 4.6&nbsp;mol C/m<sup>2</sup>, respectively) were approximately 3 times those measured in the Dalton polynya (average of 122&nbsp;mg Chl <i>a</i>/m<sup>2</sup> and 1.8&nbsp;mol C/m<sup>2</sup>). Phytoplankton communities also differed between the polynyas. Diatoms were thriving in the Mertz and Ninnis polynyas but not in the Dalton polynya, where <i>Phaeocystis antarctica</i> dominated. These strong regional differences were explored using physiological, biological, and physical parameters. The most likely drivers of the observed higher productivity in the Mertz and Ninnis were the relatively shallow inflow of iron-rich modified Circumpolar Deep Water onto the shelf as well as a very large sea ice meltwater contribution. The productivity contrast between the three polynyas could not be explained by (1) the input of glacial meltwater, (2) the presence of Ice Shelf Water, or (3) stratification of the mixed layer. Our results show that physical drivers regulate the productivity of polynyas, suggesting that the response of biological productivity and carbon export to future change will vary among polynyas.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Sea ice meltwater and circumpolar deep water drive contrasting productivity in three Antarctic polynyas","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-17 01:32:50.213978","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"polynyas; primary productivity; phytoplankton biomass; ice shelves; sea ice; iron","OtherDescriptors":null,"Notes":null,"AnaPub":2019,"MonPub":null,"DateUpdate":"2023-04-04","DateCreate":"2023-04-03","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000472819700001","VABBcode":null,"OpenAcc":0,"DOI":"10.1029/2019JC015071"},"refs":null,"anarec":{"AnaID":363046,"PubliDate":2019,"Pagination":"2943-2968","XtraPublOfAnaID":null,"ISBN":null,"Volume":"124","Issue":"5","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":272092,"SerRR":"Journal of Geophysical Research-Oceans. 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