{"refrec":{"BRefID":339810,"RR":"<b>Hoem, F.S.; Valero, L.; Evangelinos, D.; Escutia, C.; Duncan, B.; McKay, R.M.; Brinkhuis, H.; Sangiorgi, F.; Bijl, P.K.</b> (2021). Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica. <i>Clim. Past 17(4)</i>: 1423-1442. <a href=\"https://dx.doi.org/10.5194/cp-17-1423-2021\" target=\"_blank\">https://dx.doi.org/10.5194/cp-17-1423-2021</a>","BEntID":336445,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Clim. Past 17(4)</i>: 1423-1442. <a href=\"https://dx.doi.org/10.5194/cp-17-1423-2021\" target=\"_blank\">https://dx.doi.org/10.5194/cp-17-1423-2021</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hoem, F.S.; Valero, L.; Evangelinos, D.; Escutia, C.; Duncan, B.; McKay, R.M.; Brinkhuis, H.; Sangiorgi, F.; Bijl, P.K.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hoem, F.S. <i>et al.</i>","Englishabstract":" Antarctic continental ice masses fluctuated considerably during the    Oligocene “coolhouse”, at elevated atmospheric CO<sub>2</sub>    concentrations of ∼600–800 ppm. To assess the role of the ocean in the    Oligocene ice sheet variability, reconstruction of past ocean conditions in    the proximity of the Antarctic margin is needed. While relatively warm    ocean conditions have been reconstructed for the Oligocene offshore of    Wilkes Land, the geographical extent of that warmth is unknown. In this    study, we reconstruct past surface ocean conditions from glaciomarine    sediments recovered from Deep Sea Drilling Project (DSDP) Site 274 offshore    of the Ross Sea continental margin. This site, located offshore of Cape    Adare is ideally situated to characterise Oligocene regional surface ocean    conditions, as it is situated between the colder, higher-latitude Ross Sea    continental shelf and the warm-temperate Wilkes Land margin in the    Oligocene. We first improve the age model of DSDP Site 274 using integrated    bio- and magnetostratigraphy. Subsequently, we analyse organic walled    dinoflagellate cyst assemblages and lipid biomarkers (TEX<sub>86</sub>,    TetraEther indeX of 86 carbon atoms) to reconstruct surfacepalaeoceanographic conditions during the Oligocene (33.7–24.4 Ma). Both TEX    <sub>86</sub>-based sea surface temperature (SST) and microplankton results    show temperate (10–17 <sup>∘</sup>C ± 5.2 <sup>∘</sup>C) surface ocean    conditions at Site 274 throughout the Oligocene. Oceanographic conditions    between the offshore Wilkes Land margin and Cape Adare became increasingly    similar towards the late Oligocene (26.5–24.4 Ma); this is inferred to be    the consequence of the widening of the Tasmanian Gateway, which resulted in    more interconnected ocean basins and frontal systems. Maintaining marine    terminations of terrestrial ice sheets in a proto-Ross Sea with offshore    SSTs that are as warm as those suggested by our data requires a strong ice    flux fed by intensive precipitation in the Antarctic hinterland during    colder orbital states but with extensive surface melt of terrestrial ice    during warmer orbital states.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Temperate Oligocene surface ocean conditions offshore of Cape Adare, Ross Sea, Antarctica","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-10 01:32:37.494378","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-07-08","DateCreate":"2021-07-08","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000670623500001","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/cp-17-1423-2021"},"refs":null,"anarec":{"AnaID":339810,"PubliDate":2021,"Pagination":"1423-1442","XtraPublOfAnaID":null,"ISBN":null,"Volume":"17","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":220505,"SerRR":"Climate of the Past. 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