{"refrec":{"BRefID":295595,"RR":"<b>Fürst, J.J.; Gillet-Chaulet, F.; Benham, T.J.; Dowdeswell, J.A.; Grabiec, M.; Navarro, F.; Pettersson, R.; Moholdt, G.; Nuth, C.; Sass, B.; Aas, K.; Fettweis, X.; Lang, C.; Seehaus, T.; Braun, M.</b> (2017). Application of a two-step approach for mapping ice thickness to various glacier types on Svalbard. <i>Cryosphere 11(5)</i>: 2003-2032. <a href=\"https://dx.doi.org/10.5194/tc-11-2003-2017\" target=\"_blank\">https://dx.doi.org/10.5194/tc-11-2003-2017</a>","BEntID":287682,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Cryosphere 11(5)</i>: 2003-2032. <a href=\"https://dx.doi.org/10.5194/tc-11-2003-2017\" target=\"_blank\">https://dx.doi.org/10.5194/tc-11-2003-2017</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Fürst, J.J.; Gillet-Chaulet, F.; Benham, T.J.; Dowdeswell, J.A.; Grabiec, M.; Navarro, F.; Pettersson, R.; Moholdt, G.; Nuth, C.; Sass, B.; Aas, K.; Fettweis, X.; Lang, C.; Seehaus, T.; Braun, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Fürst, J.J. <i>et al.</i>","Englishabstract":"The basal topography is largely unknown beneath most glaciers and ice caps, and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we present a two-step reconstruction approach for ice thickness that solves mass conservation over single or several connected drainage basins. The approach is applied to a variety of test geometries with abundant thickness measurements including marine- and land-terminating glaciers as well as a 2400 km<sup>2</sup> ice cap on Svalbard. The input requirements are kept to a minimum for the first step. In this step, a geometrically controlled, non-local flux solution is converted into thickness values relying on the shallow ice approximation (SIA). In a second step, the thickness field is updated along fast-flowing glacier trunks on the basis of velocity observations. Both steps account for available thickness measurements. Each thickness field is presented together with an error-estimate map based on a formal propagation of input uncertainties. These error estimates point out that the thickness field is least constrained near ice divides or in other stagnant areas. Withholding a share of the thickness measurements, error estimates tend to overestimate mismatch values in a median sense. We also have to accept an aggregate uncertainty of at least 25 % in the reconstructed thickness field for glaciers with very sparse or no observations. For Vestfonna ice cap (VIC), a previous ice volume estimate based on the same measurement record as used here has to be corrected upward by 22 %. We also find that a 13 % area fraction of the ice cap is in fact grounded below sea level. The former 5 % estimate from a direct measurement interpolation exceeds an aggregate maximum range of 6–23 % as inferred from the error estimates here.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Application of a two-step approach for mapping ice thickness to various glacier types on Svalbard","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-22 01:32:01.026501","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2017,"MonPub":null,"DateUpdate":"2018-05-17","DateCreate":"2018-05-15","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000409059700001","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/tc-11-2003-2017"},"refs":null,"anarec":{"AnaID":295595,"PubliDate":2017,"Pagination":"2003-2032","XtraPublOfAnaID":null,"ISBN":null,"Volume":"11","Issue":"5","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":216569,"SerRR":"The Cryosphere. Copernicus: Göttingen.  ISSN 1994-0416; e-ISSN 1994-0424","StandardTitleSer":"The Cryosphere","ISSN":"1994-0416","AbbrevSer":"Cryosphere","StandardTitleMon":null,"StartPage":2003,"Pages":30,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Fürst","Firstname":"Johannes Jakob","Initials":"J.J.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":215067,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Gillet-Chaulet","Firstname":"Fabien","Initials":"F.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":215068,"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":"Benham","Firstname":"Toby","Initials":"T.J.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326201,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Dowdeswell","Firstname":"Julian","Initials":"J.A.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":57891,"OrderNr":4,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Grabiec","Firstname":"Mariusz","Initials":"M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326203,"OrderNr":5,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Navarro","Firstname":"Francisco","Initials":"F.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":84630,"OrderNr":6,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Pettersson","Firstname":"Rickard","Initials":"R.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326205,"OrderNr":7,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Moholdt","Firstname":"Geir","Initials":"G.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":162052,"OrderNr":8,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Nuth","Firstname":"Christopher","Initials":"C.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326207,"OrderNr":9,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Sass","Firstname":"Björn","Initials":"B.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326208,"OrderNr":10,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Aas","Firstname":"Kjetil","Initials":"K.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326209,"OrderNr":11,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Fettweis","Firstname":"Xavier","Initials":"X.","Affiliation":"Department of Geography, University of Liège","Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":182610,"OrderNr":12,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Département des Sciences Géographiques; Institut de Géographie","ORCID":"0000-0002-4140-3813","PersID":26625,"InsID":4771},{"AutName":"Lang","Firstname":"Charlotte","Initials":"C.","Affiliation":"Department of Geography, University of Liège","Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":329832,"OrderNr":13,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":"Université de Liège; Faculté des Sciences; Départment de Géographie","ORCID":null,"PersID":27159,"InsID":12155},{"AutName":"Seehaus","Firstname":"Thorsten","Initials":"T.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":326212,"OrderNr":14,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Braun","Firstname":"Matthias","Initials":"M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":287682,"AutID":215071,"OrderNr":15,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":[{"BInstID":313402,"LibID":36,"BRefID":295595,"EmbargoDate":null,"FullEmbargoDate":null,"PhysMedID":16,"hasOCRd":1,"ShelfLocCode":"313402","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","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":287682,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"},{"BEntID":287682,"AbstractFlag":1,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":[{"URL":"https://dx.doi.org/10.5194/tc-11-2003-2017","externalID":"10.5194/tc-11-2003-2017","URLTypeCode":"DOI","URLID":64645,"URLTypID":13,"URLType":"DOI","URLPrefix":"http://dx.doi.org/"}],"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":"Lyssens, Liesbeth, L.","newSesDate":{"date":"2018-05-15 12:32:46.633000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Bouchti, Zohra, Z.","updSesDate":{"date":"2018-05-17 09:11:25.863000","timezone_type":3,"timezone":"Europe/Brussels"}}}