{"refrec":{"BRefID":337900,"RR":"<b>Dalaiden, Q.; Goosse, H.; Klein, F.; Lenaerts, J.T.M.; Holloway, M.; Sime, L.; Thomas, E.R.</b> (2020). How useful is snow accumulation in reconstructing surface air temperature in Antarctica? A study combining ice core records and climate models. <i>Cryosphere 14(4)</i>: 1187-1207. <a href=\"https://hdl.handle.net/10.5194/tc-14-1187-2020\" target=\"_blank\">https://hdl.handle.net/10.5194/tc-14-1187-2020</a>","BEntID":334524,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Cryosphere 14(4)</i>: 1187-1207. <a href=\"https://hdl.handle.net/10.5194/tc-14-1187-2020\" target=\"_blank\">https://hdl.handle.net/10.5194/tc-14-1187-2020</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Dalaiden, Q.; Goosse, H.; Klein, F.; Lenaerts, J.T.M.; Holloway, M.; Sime, L.; Thomas, E.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Dalaiden, Q. <i>et al.</i>","Englishabstract":"Improving our knowledge of the temporal and spatial variability of the Antarctic Ice Sheet (AIS) surface mass balance (SMB) is crucial to reduce the uncertainties of past, present, and future Antarctic contributions to sea level rise. An examination of the surface air temperature–SMB relationship in model simulations demonstrates a strong link between the two. Reconstructions based on ice cores display a weaker relationship, indicating a model–data discrepancy that may be due to model biases or to the non-climatic noise present in the records. We find that, on the regional scale, the modeled relationship between surface air temperature and SMB is often stronger than between temperature and <span class=\"inline-formula\"><i>δ</i><sup>18</sup>O</span>. This suggests that SMB data can be used to reconstruct past surface air temperature. Using this finding, we assimilate isotope-enabled SMB and <span class=\"inline-formula\"><i>δ</i><sup>18</sup>O</span> model output with ice core observations to generate a new surface air temperature reconstruction. Although an independent evaluation of the skill is difficult because of the short observational time series, this new reconstruction outperforms the previous reconstructions for the continental-mean temperature that were based on <span class=\"inline-formula\"><i>δ</i><sup>18</sup>O</span> alone. The improvement is most significant for the East Antarctic region, where the uncertainties are particularly large. Finally, using the same data assimilation method as for the surface air temperature reconstruction, we provide a spatial SMB reconstruction for the AIS over the last 2 centuries, showing large variability in SMB trends at a regional scale, with an increase (0.82 Gt yr<span class=\"inline-formula\"><sup>−2</sup></span>) in West Antarctica over 1957–2000 and a decrease in East Antarctica during the same period (<span class=\"inline-formula\">−0.13</span> Gt yr<span class=\"inline-formula\"><sup>−2</sup></span>). As expected, this is consistent with the recent reconstruction used as a constraint in the data assimilation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"How useful is snow accumulation in reconstructing surface air temperature in Antarctica? A study combining ice core records and climate models","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-19 01:32:11.376719","timezone_type":1,"timezone":"+02:00"},"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:000525368200001","VABBcode":null,"OpenAcc":1,"Handle":"10.5194/tc-14-1187-2020"},"refs":null,"anarec":{"AnaID":337900,"PubliDate":2020,"Pagination":"1187-1207","XtraPublOfAnaID":null,"ISBN":null,"Volume":"14","Issue":"4","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":1187,"Pages":21,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Dalaiden","Firstname":"Quentin","Initials":"Q.","Affiliation":"Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute (ELI), Université catholique de Louvain (UCL)","Discriminator":null,"CorporateFlag":0,"BEntID":334524,"AutID":448110,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"ELIc","InsFSN":"Université Catholique de Louvain; Science and Technology Sector; Earth and Life Institute; Earth and Climate division","ORCID":"0000-0002-3885-3848","PersID":37729,"InsID":468},{"AutName":"Goosse","Firstname":"Hugues","Initials":"H.","Affiliation":"Georges Lemaître Centre for Earth and Climate Research (TECLIM), Earth and Life Institute (ELI), Université catholique de Louvain (UCL)","Discriminator":null,"CorporateFlag":0,"BEntID":334524,"AutID":335922,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"ELIc","InsFSN":"Université Catholique de Louvain; 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