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Article: Possible obliquity-forced warmth in southern Asia during the last glacial stage

TitlePossible obliquity-forced warmth in southern Asia during the last glacial stage
Authors
KeywordsSouthern Asia
Lake sediments
brGDGTs
Annual temperature
The last glacial stage
Issue Date2021
PublisherElsevier B.V. and Science China Press. The Journal's web site is located at http://www.sciencedirect.com/science/journal/20959273?sdc=1
Citation
Science Bulletin, 2021, v. 66 n. 11, p. 1136-1145 How to Cite?
AbstractOrbital-scale global climatic changes during the late Quaternary are dominated by high-latitude influenced ~100,000-year global ice-age cycles and monsoon influenced ~23,000-year low-latitude hydroclimate variations. However, the shortage of highly-resolved land temperature records remains a limiting factor for achieving a comprehensive understanding of long-term low-latitude terrestrial climatic changes. Here, we report paired mean annual air temperature (MAAT) and monsoon intensity proxy records over the past 88,000 years from Lake Tengchongqinghai in southwestern China. While summer monsoon intensity follows the ~23,000-year precession beat found also in previous studies, we identify previously unrecognized warm periods at 88,000–71,000 and 45,000–22,000 years ago, with 2–3 °C amplitudes that are close to our recorded full glacial-interglacial range. Using advanced transient climate simulations and comparing with forcing factors, we find that these warm periods in our MAAT record probably depends on local annual mean insolation, which is controlled by Earth’s ~41,000-year obliquity cycles and is anti-phased to annual mean insolation at high latitudes. The coincidence of our identified warm periods and intervals of high-frequent dated archaeological evidence highlights the importance of temperature on anatomically modern humans in Asia during the last glacial stage.
Persistent Identifierhttp://hdl.handle.net/10722/304961
ISSN
2023 Impact Factor: 18.8
2023 SCImago Journal Rankings: 2.807
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhao, C-
dc.contributor.authorRohling, EJ-
dc.contributor.authorLiu, Z-
dc.contributor.authorYang, X-
dc.contributor.authorZhang, E-
dc.contributor.authorCheng, J-
dc.contributor.authorLiu, Z-
dc.contributor.authorAn, Z-
dc.contributor.authorYang, X-
dc.contributor.authorFeng, X-
dc.contributor.authorSun, X-
dc.contributor.authorZhang, C-
dc.contributor.authorYan, T-
dc.contributor.authorLong, H-
dc.contributor.authorYan, H-
dc.contributor.authorYu, Z-
dc.contributor.authorLiu, W-
dc.contributor.authorYu, S-
dc.contributor.authorShen, J-
dc.date.accessioned2021-10-05T02:37:43Z-
dc.date.available2021-10-05T02:37:43Z-
dc.date.issued2021-
dc.identifier.citationScience Bulletin, 2021, v. 66 n. 11, p. 1136-1145-
dc.identifier.issn2095-9273-
dc.identifier.urihttp://hdl.handle.net/10722/304961-
dc.description.abstractOrbital-scale global climatic changes during the late Quaternary are dominated by high-latitude influenced ~100,000-year global ice-age cycles and monsoon influenced ~23,000-year low-latitude hydroclimate variations. However, the shortage of highly-resolved land temperature records remains a limiting factor for achieving a comprehensive understanding of long-term low-latitude terrestrial climatic changes. Here, we report paired mean annual air temperature (MAAT) and monsoon intensity proxy records over the past 88,000 years from Lake Tengchongqinghai in southwestern China. While summer monsoon intensity follows the ~23,000-year precession beat found also in previous studies, we identify previously unrecognized warm periods at 88,000–71,000 and 45,000–22,000 years ago, with 2–3 °C amplitudes that are close to our recorded full glacial-interglacial range. Using advanced transient climate simulations and comparing with forcing factors, we find that these warm periods in our MAAT record probably depends on local annual mean insolation, which is controlled by Earth’s ~41,000-year obliquity cycles and is anti-phased to annual mean insolation at high latitudes. The coincidence of our identified warm periods and intervals of high-frequent dated archaeological evidence highlights the importance of temperature on anatomically modern humans in Asia during the last glacial stage.-
dc.languageeng-
dc.publisherElsevier B.V. and Science China Press. The Journal's web site is located at http://www.sciencedirect.com/science/journal/20959273?sdc=1-
dc.relation.ispartofScience Bulletin-
dc.subjectSouthern Asia-
dc.subjectLake sediments-
dc.subjectbrGDGTs-
dc.subjectAnnual temperature-
dc.subjectThe last glacial stage-
dc.titlePossible obliquity-forced warmth in southern Asia during the last glacial stage-
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.scib.2020.11.016-
dc.identifier.scopuseid_2-s2.0-85098153541-
dc.identifier.hkuros326255-
dc.identifier.volume66-
dc.identifier.issue11-
dc.identifier.spage1136-
dc.identifier.epage1145-
dc.identifier.isiWOS:000656697400013-
dc.publisher.placeUnited States-

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