{"refrec":{"BRefID":338319,"RR":"<b>Bach, L.T.; Tamsitt, V.; Gower, J.; Hurd, C.L.; Raven, J.A.; Boyd, P.W.</b> (2021). Testing the climate intervention potential of ocean afforestation using the Great Atlantic <i>Sargassum</i> Belt. <i>Nature Comm. 12(1)</i>: 2556. <a href=\"https://hdl.handle.net/10.1038/s41467-021-22837-2\" target=\"_blank\">https://hdl.handle.net/10.1038/s41467-021-22837-2</a>","BEntID":334945,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Nature Comm. 12(1)</i>: 2556. <a href=\"https://hdl.handle.net/10.1038/s41467-021-22837-2\" target=\"_blank\">https://hdl.handle.net/10.1038/s41467-021-22837-2</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Bach, L.T.; Tamsitt, V.; Gower, J.; Hurd, C.L.; Raven, J.A.; Boyd, P.W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Bach, L.T. <i>et al.</i>","Englishabstract":"Ensuring that global warming remains <2 °C requires rapid CO<sub>2</sub> emissions reduction. Additionally, 100–900 gigatons CO<sub>2</sub> must be removed from the atmosphere by 2100 using a portfolio of CO<sub>2</sub> removal (CDR) methods. Ocean afforestation, CDR through basin-scale seaweed farming in the open ocean, is seen as a key component of the marine portfolio. Here, we analyse the CDR potential of recent re-occurring trans-basin belts of the floating seaweed <i>Sargassum</i> in the (sub)tropical North Atlantic as a natural analogue for ocean afforestation. We show that two biogeochemical feedbacks, nutrient reallocation and calcification by encrusting marine life, reduce the CDR efficacy of <i>Sargassum</i> by 20–100%. Atmospheric CO<sub>2</sub> influx into the surface seawater, after CO<sub>2</sub>-fixation by <i>Sargassum</i>, takes 2.5–18 times longer than the CO<sub>2</sub>-deficient seawater remains in contact with the atmosphere, potentially hindering CDR verification. Furthermore, we estimate that increased ocean albedo, due to floating <i>Sargassum</i>, could influence climate radiative forcing more than <i>Sargassum</i>-CDR. Our analysis shows that multifaceted Earth-system feedbacks determine the efficacy of ocean afforestation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Testing the climate intervention potential of ocean afforestation using the Great Atlantic <i>Sargassum</i> Belt","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-17 01:34:10.172088","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2023-02-07","DateCreate":"2021-05-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000656447400001","VABBcode":null,"OpenAcc":1,"Handle":"10.1038/s41467-021-22837-2"},"refs":null,"anarec":{"AnaID":338319,"PubliDate":2021,"Pagination":"2556","XtraPublOfAnaID":null,"ISBN":null,"Volume":"12","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":198717,"SerRR":"Nature Communications. 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