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Article: Cenozoic moisture fluctuations on the northeastern Tibetan Plateau and association with global climatic conditions

TitleCenozoic moisture fluctuations on the northeastern Tibetan Plateau and association with global climatic conditions
Authors
KeywordsCenozoic
Qaidam Basin
Moisture fluctuation
Global climate change
Carbonate oxygen isotope
Issue Date2020
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes
Citation
Journal of Asian Earth Sciences, 2020, v. 200, p. article no. 104490 How to Cite?
AbstractThe Cenozoic history of aridification in the Asian interior is thought to be intimately linked to uplift of the Tibetan Plateau and long-term global cooling. How fluctuating climatic conditions influenced regional moisture levels during the Cenozoic remains largely unknown. To infer moisture changes, we present oxygen isotope values of carbonates (δ18Ocarb) and carbon isotope values of long-chain n-alkanes (δ13Calk) from a continuous geological section in the Qaidam Basin, northwestern China. The section spans most of the Cenozoic Era, from ~52 to 5 million years ago (Ma), based on conventional chronology, whereas recently a drastically revised chronology has placed its basal age at ~26 Ma. The association of moisture changes with global climate largely depends on the chosen chronology. With the revised chronology, our records are inconsistent with existing moisture records from the Asian interior and do not show clear association with global climatic conditions. However, with the conventional chronology, our δ18Ocarb record shows a long-term aridification trend over the Cenozoic, whereas the δ13Calk suggests reduced moisture levels during the Oligocene. Both records consistently show enhanced aridity, notably during the Oligocene, ~20–17 Ma and after ~13 Ma, which largely corresponded to relatively cool global periods. Our records thus suggest that global climatic conditions during the Cenozoic exerted more influence on the moisture levels in the Asian interior than previously thought, if the conventional chronology is correct. Our study also highlights the importance of constructing a reliable chronology in order to make an association of Cenozoic terrestrial records with global climate.
Persistent Identifierhttp://hdl.handle.net/10722/284556
ISSN
2019 Impact Factor: 3.059
2015 SCImago Journal Rankings: 1.393

 

DC FieldValueLanguage
dc.contributor.authorSun, Y-
dc.contributor.authorLiu, J-
dc.contributor.authorLIANG, Y-
dc.contributor.authorJi, J-
dc.contributor.authorLiu, W-
dc.contributor.authorAitchison, JC-
dc.contributor.authorSun, J-
dc.contributor.authorLu, J-
dc.contributor.authorSong, B-
dc.contributor.authorXu, Y-
dc.contributor.authorZhang, K-
dc.contributor.authorLiu, Z-
dc.date.accessioned2020-08-07T08:59:19Z-
dc.date.available2020-08-07T08:59:19Z-
dc.date.issued2020-
dc.identifier.citationJournal of Asian Earth Sciences, 2020, v. 200, p. article no. 104490-
dc.identifier.issn1367-9120-
dc.identifier.urihttp://hdl.handle.net/10722/284556-
dc.description.abstractThe Cenozoic history of aridification in the Asian interior is thought to be intimately linked to uplift of the Tibetan Plateau and long-term global cooling. How fluctuating climatic conditions influenced regional moisture levels during the Cenozoic remains largely unknown. To infer moisture changes, we present oxygen isotope values of carbonates (δ18Ocarb) and carbon isotope values of long-chain n-alkanes (δ13Calk) from a continuous geological section in the Qaidam Basin, northwestern China. The section spans most of the Cenozoic Era, from ~52 to 5 million years ago (Ma), based on conventional chronology, whereas recently a drastically revised chronology has placed its basal age at ~26 Ma. The association of moisture changes with global climate largely depends on the chosen chronology. With the revised chronology, our records are inconsistent with existing moisture records from the Asian interior and do not show clear association with global climatic conditions. However, with the conventional chronology, our δ18Ocarb record shows a long-term aridification trend over the Cenozoic, whereas the δ13Calk suggests reduced moisture levels during the Oligocene. Both records consistently show enhanced aridity, notably during the Oligocene, ~20–17 Ma and after ~13 Ma, which largely corresponded to relatively cool global periods. Our records thus suggest that global climatic conditions during the Cenozoic exerted more influence on the moisture levels in the Asian interior than previously thought, if the conventional chronology is correct. Our study also highlights the importance of constructing a reliable chronology in order to make an association of Cenozoic terrestrial records with global climate.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/jseaes-
dc.relation.ispartofJournal of Asian Earth Sciences-
dc.subjectCenozoic-
dc.subjectQaidam Basin-
dc.subjectMoisture fluctuation-
dc.subjectGlobal climate change-
dc.subjectCarbonate oxygen isotope-
dc.titleCenozoic moisture fluctuations on the northeastern Tibetan Plateau and association with global climatic conditions-
dc.typeArticle-
dc.identifier.emailLiu, Z: zhliu@hku.hk-
dc.identifier.authorityLiu, Z=rp00750-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jseaes.2020.104490-
dc.identifier.scopuseid_2-s2.0-85088124250-
dc.identifier.hkuros312442-
dc.identifier.volume200-
dc.identifier.spagearticle no. 104490-
dc.identifier.epagearticle no. 104490-
dc.publisher.placeUnited Kingdom-

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