{"refrec":{"BRefID":404755,"RR":"<b>Delaigue, L.; Sulpis, O.; Reichart, G.-J.; Humphreys, M.P.</b> (2024). The changing biological carbon pump of the South Atlantic Ocean. <i>Global Biogeochem. Cycles 38(9)</i>: e2024GB008202. <a href=\"https://dx.doi.org/10.1029/2024gb008202\" target=\"_blank\">https://dx.doi.org/10.1029/2024gb008202</a>","BEntID":402548,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Global Biogeochem. Cycles 38(9)</i>: e2024GB008202. <a href=\"https://dx.doi.org/10.1029/2024gb008202\" target=\"_blank\">https://dx.doi.org/10.1029/2024gb008202</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Delaigue, L.; Sulpis, O.; Reichart, G.-J.; Humphreys, M.P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Delaigue, L. <i>et al.</i>","Englishabstract":"<span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">Global marine anthropogenic CO</span><sub>2</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> inventories have traditionally emphasized the North Atlantic's role in the carbon cycle, while Southern hemisphere processes are less understood. The South Subtropical Convergence (SSTC) in the South Atlantic, a juncture of distinct nutrient-rich waters, offers a valuable study area for discerning the potential impacts of climate change on the ocean's biological carbon pump (C</span><sub>soft</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">). Using discrete observations from GLODAPv2.2022 and BGC-Argo at 40°S in the Atlantic Ocean from 1972 to 2023, an increase in dissolved inorganic carbon (DIC) of +1.44&nbsp;±&nbsp;0.11&nbsp;μmol&nbsp;kg</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">&nbsp;yr</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> in surface waters was observed. While anthropogenic CO</span><sub>2</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> played a role, variations in the contribution of C</span><sub>soft</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> were observed. Discrepancies emerged in assessing C</span><sub>soft</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> based on the tracers employed: when using AOU, C</span><sub>soft(AOU)</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> recorded an increase of +0.20&nbsp;±&nbsp;0.03&nbsp;μmol&nbsp;kg</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">&nbsp;yr</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">, while using nitrate as the reference, C</span><sub>soft(NO3)</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> displayed an increase of +0.85&nbsp;±&nbsp;0.07&nbsp;μmol&nbsp;kg</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">&nbsp;yr</span><sup>−1</sup><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">. Key processes such as water mass composition shifts, changes in oxygenation, remineralization in the Southern Ocean, and the challenges they pose in accurately representing the evolving C</span><sub>soft</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\"> are discussed. These findings highlight that while global studies primarily attribute DIC increase to anthropogenic CO</span><sub>2</sub><span style=\"background-color:rgb(255,255,255);color:rgb(0,0,0);\">, observations at 40°S reveal an intensified biological carbon pump, showing that regional DIC changes are more complex than previously thought and emphasizing the need for better parameterizations to compute the BCP in the marine carbon budget.</span>","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The changing biological carbon pump of the South Atlantic Ocean","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-10 01:32:59.652471","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"anthropogenic CO<sub>2; </sub>biological carbon pump intensification; south subtropical convergence","OtherDescriptors":null,"Notes":null,"AnaPub":2024,"MonPub":null,"DateUpdate":"2024-12-09","DateCreate":"2024-12-09","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1,"DOI":"10.1029/2024gb008202"},"refs":null,"anarec":{"AnaID":404755,"PubliDate":2024,"Pagination":"e2024GB008202","XtraPublOfAnaID":null,"ISBN":null,"Volume":"38","Issue":"9","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45841,"SerRR":"Global Biogeochemical Cycles. 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