{"refrec":{"BRefID":339143,"RR":"<b>He, C.; Liu, Z.; Otto-Bliesner, B.L.; Brady, E.C.; Zhu, C.; Tomás, R.; Buizert, C.; Severinghaus, J.P.</b> (2021). Abrupt Heinrich Stadial 1 cooling missing in Greenland oxygen isotopes. <i>Science Advances 7(25)</i>: eabh1007. <a href=\"https://dx.doi.org/10.1126/sciadv.abh1007\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abh1007</a>","BEntID":335778,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Science Advances 7(25)</i>: eabh1007. <a href=\"https://dx.doi.org/10.1126/sciadv.abh1007\" target=\"_blank\">https://dx.doi.org/10.1126/sciadv.abh1007</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"He, C.; Liu, Z.; Otto-Bliesner, B.L.; Brady, E.C.; Zhu, C.; Tomás, R.; Buizert, C.; Severinghaus, J.P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"He, C. <i>et al.</i>","Englishabstract":"Abrupt climate changes during the last deglaciation have been well preserved in proxy records across the globe. However, one long-standing puzzle is the apparent absence of the onset of the Heinrich Stadial 1 (HS1) cold event around 18 ka in Greenland ice core oxygen isotope δ<sup>18</sup><em>O</em> records, inconsistent with other proxies. Here, combining proxy records with an isotope-enabled transient deglacial simulation, we propose that a substantial HS1 cooling onset did indeed occur over the Arctic in winter. However, this cooling signal in the depleted oxygen isotopic composition is completely compensated by the enrichment because of the loss of winter precipitation in response to sea ice expansion associated with AMOC slowdown during extreme glacial climate. In contrast, the Arctic summer warmed during HS1 and YD because of increased insolation and greenhouse gases, consistent with snowline reconstructions. Our work suggests that Greenland δ<sup>18</sup><em>O</em> may substantially underestimate temperature variability during cold glacial conditions.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Abrupt Heinrich Stadial 1 cooling missing in Greenland oxygen isotopes","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":2021,"MonPub":null,"DateUpdate":"2021-06-17","DateCreate":"2021-06-17","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000664958400008","VABBcode":null,"OpenAcc":1,"DOI":"10.1126/sciadv.abh1007"},"refs":null,"anarec":{"AnaID":339143,"PubliDate":2021,"Pagination":"eabh1007","XtraPublOfAnaID":null,"ISBN":null,"Volume":"7","Issue":"25","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":248966,"SerRR":"Science Advances. 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