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Paleoclimate changes of the past 30 cal ka BP inferred from lipid biomarkers and geochemical records from Qionghai Lake, southwest China
Wang, Gen1; Wang, Yongli2; Wei, Zhifu1; He, Wei1,3; Ma, Xueyun1,3; Sun, Zepeng1,3; Xu, Liang1,3; Gong, Juncheng1; Wang, Zixiang4; Pan, Yanhui5
2019-04-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume172Pages:346-358
AbstractMulti-proxy records of paleoclimate changes spanning the past 30 cal ka BP were obtained from Qionghai Lake sediment core, Sichuan Province, southwest China, where southwest summer monsoon prevails. The core was studied for molecular compositions of n-alkanes, stable carbon isotope ratios (delta C-13) of organic matter (OM), total organic carbon (TOC), total nitrogen (TN) and trace elements. Evidence from n-alkanes, cross chart of C/N-delta C-13 values and trace elements indicated the organic matter derived from a mixed source composed of autochthonous aquatic organisms and allochthonous terrestrial plants, and the sediments mainly deposited in reducing conditions, which is in favor of preservation and accumulation of OM. Variations of n-alkanes biomarker proxies, delta C-13 of organic matter and Mo concentrations reflected three stages of paleoclimate evolution during the past 30 cal ka BP: a relatively warm and humid climate between 29.1 and 22.9 cal ka BP, corresponding to a strong southwest summer monsoon; climate shifted towards cold and dry condition during the period of 22.9-15.7 cal ka BP, in response to the reduced insolation and weakened southwest summer monsoon; temperature and humidity gradually increased in the Holocene with fluctuations, broadly track the strengthening trend of southwest summer monsoon. Our findings further confirm that variations in solar activity may primarily affect the strength of southwest summer monsoon, resulting in the shifts of paleoclimate conditions. Further studies are needed to better constrain the detailed forcing drivers which may amplify the intensity of southwest summer monsoon particularly in the Holocene period.
KeywordPaleoclimate Biomarker n-Alkanes Southwest summer monsoon Qionghai Lake Southwest China
DOI10.1016/j.jseaes.2018.09.019
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu
WOS KeywordINDIAN-SUMMER MONSOON ; HOLOCENE ASIAN MONSOON ; NORTHWESTERN YUNNAN PROVINCE ; ALPINE LACUSTRINE RECORD ; EASTERN TIBETAN PLATEAU ; N-ALKANE DISTRIBUTIONS ; ORGANIC-MATTER ; NAM-CO ; ISOTOPIC STRATIGRAPHY ; ENVIRONMENTAL-CHANGES
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0604803] ; National Natural Science Foundation of China[41572350] ; National Natural Science Foundation of China[41503049] ; Chinese Academy of Sciences Key Project[XDB10030404] ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu[1309RTSA041]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Chinese Academy of Sciences Key Project ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu ; Key Laboratory Project of Gansu
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000459837500022
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90913
Collection兰州油气中心
Corresponding AuthorWang, Yongli; Wei, Zhifu
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources, Gansu Prov Key Lab Petr Resources Res, Lanzhou 73000, Gansu, Peoples R China
2.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Sinopec Jianghan Oilfield Co, Wuhan 430233, Hubei, Peoples R China
5.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Wang, Gen,Wang, Yongli,Wei, Zhifu,et al. Paleoclimate changes of the past 30 cal ka BP inferred from lipid biomarkers and geochemical records from Qionghai Lake, southwest China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,172:346-358.
APA Wang, Gen.,Wang, Yongli.,Wei, Zhifu.,He, Wei.,Ma, Xueyun.,...&Pan, Yanhui.(2019).Paleoclimate changes of the past 30 cal ka BP inferred from lipid biomarkers and geochemical records from Qionghai Lake, southwest China.JOURNAL OF ASIAN EARTH SCIENCES,172,346-358.
MLA Wang, Gen,et al."Paleoclimate changes of the past 30 cal ka BP inferred from lipid biomarkers and geochemical records from Qionghai Lake, southwest China".JOURNAL OF ASIAN EARTH SCIENCES 172(2019):346-358.
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