{"refrec":{"BRefID":344775,"RR":"<b>Lauretano, V.; Kennedy-Asser, A.T.; Korasidis, V.A.; Wallace, M.W.; Valdes, P.J.; Lunt, D.J.; Pancost, R.D.; Naafs, B.D.A.</b> (2021). Eocene to Oligocene terrestrial Southern Hemisphere cooling caused by declining pCO<sub>2</sub>. <i>Nature Geoscience 14(9)</i>: 659-664. <a href=\"https://dx.doi.org/10.1038/s41561-021-00788-z\" target=\"_blank\">https://dx.doi.org/10.1038/s41561-021-00788-z</a>","BEntID":341410,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Nature Geoscience 14(9)</i>: 659-664. <a href=\"https://dx.doi.org/10.1038/s41561-021-00788-z\" target=\"_blank\">https://dx.doi.org/10.1038/s41561-021-00788-z</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lauretano, V.; Kennedy-Asser, A.T.; Korasidis, V.A.; Wallace, M.W.; Valdes, P.J.; Lunt, D.J.; Pancost, R.D.; Naafs, B.D.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lauretano, V. <i>et al.</i>","Englishabstract":"The greenhouse-to-icehouse climate transition from the Eocene into the Oligocene is well documented by sea surface temperature records from the southwest Pacific and Antarctic margin, which show evidence of pronounced long-term cooling. However, identification of a driving mechanism depends on a better understanding of whether this cooling was also present in terrestrial settings. Here, we present a semi-continuous terrestrial temperature record spanning from the middle Eocene to the early Oligocene (~41–33 million years ago), using bacterial molecular fossils (biomarkers) preserved in a sequence of southeast Australian lignites. Our results show that mean annual temperatures in southeast Australia gradually declined from ~27 °C (±4.7 °C) during the middle Eocene to ~22–24 °C (±4.7 °C) during the late Eocene, followed by a ~2.4 °C-step cooling across the Eocene/Oligocene boundary. This trend is comparable to other temperature records in the Southern Hemisphere, suggesting a common driving mechanism, likely pCO2. We corroborate these results with a suite of climate model simulations demonstrating that only simulations including a decline in pCO2 lead to a cooling in southeast Australia consistent with our proxy record. Our data form an important benchmark for testing climate model performance, sea–land interaction and climatic forcings at the onset of a major Antarctic glaciation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Eocene to Oligocene terrestrial Southern Hemisphere cooling caused by declining pCO<sub>2</sub>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-09-17","DateCreate":"2021-09-13","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000680330900004","VABBcode":null,"OpenAcc":0,"DOI":"10.1038/s41561-021-00788-z"},"refs":null,"anarec":{"AnaID":344775,"PubliDate":2021,"Pagination":"659-664","XtraPublOfAnaID":null,"ISBN":null,"Volume":"14","Issue":"9","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":123796,"SerRR":"Nature Geoscience. 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