{"refrec":{"BRefID":337794,"RR":"<b>Puglini, M.; Brovkin, V.; Regnier, P.; Arndt, S.</b> (2020). Assessing the potential for non-turbulent methane escape from the East Siberian Arctic Shelf. <i>Biogeosciences 17(12)</i>: 3247-3275. <a href=\"https://hdl.handle.net/10.5194/bg-17-3247-2020\" target=\"_blank\">https://hdl.handle.net/10.5194/bg-17-3247-2020</a>","BEntID":334418,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Biogeosciences 17(12)</i>: 3247-3275. <a href=\"https://hdl.handle.net/10.5194/bg-17-3247-2020\" target=\"_blank\">https://hdl.handle.net/10.5194/bg-17-3247-2020</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Puglini, M.; Brovkin, V.; Regnier, P.; Arndt, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Puglini, M. <i>et al.</i>","Englishabstract":"The East Siberian Arctic Shelf (ESAS) hosts large yet poorly quantified reservoirs of subsea permafrost and associated gas hydrates. It has been suggested that the global-warming induced thawing and dissociation of these reservoirs is currently releasing methane (<span class=\"inline-formula\">CH<sub>4</sub></span>) to the shallow coastal ocean and ultimately the atmosphere. However, a major unknown in assessing the contribution of this <span class=\"inline-formula\">CH<sub>4</sub></span> flux to the global <span class=\"inline-formula\">CH<sub>4</sub></span> cycle and its climate feedbacks is the fate of <span class=\"inline-formula\">CH<sub>4</sub></span> as it migrates towards the sediment–water interface. In marine sediments, (an)aerobic oxidation reactions generally act as a very efficient methane sink. However, a number of environmental conditions can reduce the efficiency of this biofilter. Here, we used a reaction-transport model to assess the efficiency of the benthic methane filter and, thus, the potential for benthic methane escape across a wide range of environmental conditions that could be encountered on the East Siberian Arctic Shelf. Results show that, under steady-state conditions, anaerobic oxidation of methane (AOM) acts as an efficient biofilter. However, high <span class=\"inline-formula\">CH<sub>4</sub></span> escape is simulated for rapidly accumulating and/or active sediments and can be further enhanced by the presence of organic matter with intermediate reactivity and/or intense local transport processes, such as bioirrigation. In addition, in active settings, the sudden onset of <span class=\"inline-formula\">CH<sub>4</sub></span> flux triggered by, for instance, permafrost thaw or hydrate destabilization can also drive a high non-turbulent methane escape of up to 19 <span class=\"inline-formula\">µ</span>mol <span class=\"inline-formula\">CH<sub>4</sub></span> cm<span class=\"inline-formula\"><sup>−2</sup></span> yr<span class=\"inline-formula\"><sup>−1</sup></span> during a transient, multi-decadal period. This “window of opportunity” arises due to delayed response of the resident microbial community to suddenly changing <span class=\"inline-formula\">CH<sub>4</sub></span> fluxes. A first-order estimate of non-turbulent, benthic methane efflux from the Laptev Sea is derived as well. We find that, under present-day conditions, non-turbulent methane efflux from Laptev Sea sediments does not exceed 1 Gg <span class=\"inline-formula\">CH<sub>4</sub></span> yr<span class=\"inline-formula\"><sup>−1</sup></span>. As a consequence, we conclude that previously published estimates of ocean–atmosphere <span class=\"inline-formula\">CH<sub>4</sub></span> fluxes from the ESAS cannot be supported by non-turbulent, benthic methane escape.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Assessing the potential for non-turbulent methane escape from the East Siberian Arctic Shelf","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:01.897972","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2021-05-31","DateCreate":"2021-05-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000543797400002","VABBcode":null,"OpenAcc":1,"Handle":"10.5194/bg-17-3247-2020"},"refs":null,"anarec":{"AnaID":337794,"PubliDate":2020,"Pagination":"3247-3275","XtraPublOfAnaID":null,"ISBN":null,"Volume":"17","Issue":"12","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":68092,"SerRR":"<b>Gattuso, J.P.; Kesselmeier, J. (Ed.)</b> Biogeosciences. Copernicus Publications: Göttingen.  ISSN 1726-4170; e-ISSN 1726-4189","StandardTitleSer":"Biogeosciences","ISSN":"1726-4170","AbbrevSer":"Biogeosciences","StandardTitleMon":null,"StartPage":3247,"Pages":29,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Puglini","Firstname":"Matteo","Initials":"M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":334418,"AutID":450540,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":36680,"InsID":null},{"AutName":"Brovkin","Firstname":"Victor","Initials":"V.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":334418,"AutID":255986,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Regnier","Firstname":"Pierre","Initials":"P.","Affiliation":"BGeosys, Department Geoscience, Environment & Society (DGES), Université Libre de Bruxelles","Discriminator":null,"CorporateFlag":0,"BEntID":334418,"AutID":379114,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"BGéOsys","InsFSN":"Université Libre de Bruxelles; Faculté des Sciences; Département des Sciences de la Terre et de l'Environnement; Groupe de Biogéochimie et Modélisation du Système Terre","ORCID":null,"PersID":3934,"InsID":11949},{"AutName":"Arndt","Firstname":"Sandra","Initials":"S.","Affiliation":"BGeosys, Department Geoscience, Environment & Society (DGES), Université Libre de Bruxelles","Discriminator":null,"CorporateFlag":0,"BEntID":334418,"AutID":379112,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"BGéOsys","InsFSN":"Université Libre de Bruxelles; Faculté des Sciences; Département des Sciences de la Terre et de l'Environnement; Groupe de Biogéochimie et Modélisation du Système Terre","ORCID":"0000-0002-0235-8124","PersID":23970,"InsID":11949}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":361944,"LibID":36,"BRefID":337794,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"361944","RFID":null,"PaidValue":null,"Medium":"Server","Description":"VLIZ Open Access","Acronym":"VLIZ","Library":"Vlaams Instituut voor de Zee","DutchTerm":"Open access","URL":null,"ClassifID":53,"Classification":"Open access","ReqLink":null,"ClassifTypID":1,"URLLocation":"https://www.vliz.be/imisdocs/publications/","SubDir":null,"InternalReq":0,"LoggedInReq":0,"Disclaimer":null,"DutchDisclaimer":null,"FileFormat":".pdf","FileDescr":"pdf","InsPub":1,"InsID":36,"FileFormID":6,"LendableFlag":1,"PublicFlag":1,"orderLib":"A","Notes":null,"AccConID":null,"AccessConstraint":null,"LicURL":null}],"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"Copernicus Publications","City":"Göttingen"}],"MONpubls":null,"pictures":[],"thestermsPath":null,"thestermsASFA":null,"taxtermsASFA":null,"geotermsASFA":null,"collections":[{"Collection":"OMA - Open Marien Archief","ShortName":"OMA"}],"conf":null,"proj":null,"Physdatasets":null,"spcols":{"222":{"SpName":"BMB - Belgische Mariene Bibliografie","SpColID":222,"ParSpColID":null,"TopParID":null,"ShortName":"BMB","URLLocation":null,"LibID":36,"OpenRepoFlag":null,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"BMB"},"221":{"SpName":"OMA - Open Marien Archief","SpColID":221,"ParSpColID":null,"TopParID":null,"ShortName":"OMA","URLLocation":null,"LibID":36,"OpenRepoFlag":1,"SpTypID":null,"TopParIDNotWebsite":null,"SpColPath":"OMA"}},"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":334418,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":334418,"AbstractFlag":1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://hdl.handle.net/10.5194/bg-17-3247-2020","externalID":"10.5194/bg-17-3247-2020","URLTypeCode":"Handle","URLID":93456,"URLTypID":32,"URLType":"Handle","URLPrefix":"https://hdl.handle.net/"}],"thesterms":null,"taxterms":null,"geoterms":null,"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":null,"taxtermsFRIS":null,"geotermsFRIS":null,"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Bouchti, Zohra, Z.","newSesDate":{"date":"2021-05-17 17:11:52.947000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Bouchti, Zohra, Z.","updSesDate":{"date":"2021-05-31 06:57:28.917000","timezone_type":3,"timezone":"Europe/Brussels"}}}