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High-resolution paleoclimatic records spanning the past 30 cal ka BP inferred from Qionghai Lake sediments in south-west China: Insights from geochemical investigations and grain-size characteristics
Wang, Gen1; Wei, Zhifu1; Wang, Yongli1,2; Zhang, Ting1,3; He, Wei1,3; Sun, Zepeng1,3; Xu, Liang1,3; Gong, Juncheng1
2019-07-01
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Volume54Issue:4Pages:2495-2507
AbstractThere have been few high-resolution investigations covering the last glacial and Holocene from Sichuan, Yunnan, or south Asia area in the south-west monsoon domain region. High-resolution analyses of lake sediments retrieved from Qionghai Lake, Sichuan Province, were conducted using a combination of variables including total organic carbon (TOC) and total nitrogen (TN) concentration, low frequency magnetic susceptibility (chi(LF)), particle size, carbonate content, and delta C-13 value of organic matter (delta C-13(org)), to provide a new perspective on the detailed paleoclimate history of south-west China spanning the past 30 cal ka BP. Our findings suggest that organic matter in the Qionghai Lake was mainly derived from microorganisms, aquatic macrophytes, and terrestrial C-3 plants. From 29.1 to 23.2 cal ka BP, low carbonate contents, high median grain size (Md values), and chi(LF) values indicated a warm and wet climate. During the period 23.2 to 15.4 cal ka BP, low chi(LF), Md values, and high carbonate contents suggested a decrease in temperature and humidity. The cold and dry Last Glacial Maximum (LGM) and Heinrich 1 event (H1) were captured between 21.6 and 19.4 cal ka BP and 17.6 and 15.8 cal ka BP, respectively. During the interval 15.4 to 9.7 cal ka BP, low level of chi(LF) values and Md values, together with relatively high carbonates, demonstrated that a dry climate prevailed in this period. Since 9.7 cal ka BP, the climate was warm and humid in the early to mid-Holocene and shifted towards cold and dry condition in the late Holocene. A cold and dry period at 8.5 to 8.1 cal ka BP and warm and wet interval at 6.6 to 4.6 cal ka BP were identified, corresponding to the 8.2-ka cold event and Holocene climatic optimum (HCO), respectively. These climate changes may reflect variations of the intensity of the south-west summer monsoon, primarily in response to the Northern Hemisphere solar insolation on a millennial scale induced by orbital forcing. The position of the Intertropical Convergence Zone (ITCZ) may add a complementary effect on the evolution of the monsoon strength in the Holocene.
Keywordgrain size Late Quaternary paleoclimate south-west monsoon SW China
DOI10.1002/gj.3308
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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province
WOS KeywordINDIAN-SUMMER MONSOON ; NORTHWESTERN YUNNAN PROVINCE ; HOLOCENE VEGETATION HISTORY ; ALPINE LACUSTRINE RECORD ; NORTH-ATLANTIC OCEAN ; SOUTHWESTERN CHINA ; DALI LAKE ; LAST DEGLACIATION ; CLIMATE HISTORY ; TIBETAN PLATEAU
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] ; Western Light Project ; Key Laboratory Project of Gansu Province[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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; 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 ; Western Light Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000477016000037
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92969
Collection兰州油气中心
新生代地质与环境院重点实验室
Corresponding AuthorWei, Zhifu; Wang, Yongli
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Key Lab Petr Resources Gansu Prov, Lanzhou, Gansu, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Gen,Wei, Zhifu,Wang, Yongli,et al. High-resolution paleoclimatic records spanning the past 30 cal ka BP inferred from Qionghai Lake sediments in south-west China: Insights from geochemical investigations and grain-size characteristics[J]. GEOLOGICAL JOURNAL,2019,54(4):2495-2507.
APA Wang, Gen.,Wei, Zhifu.,Wang, Yongli.,Zhang, Ting.,He, Wei.,...&Gong, Juncheng.(2019).High-resolution paleoclimatic records spanning the past 30 cal ka BP inferred from Qionghai Lake sediments in south-west China: Insights from geochemical investigations and grain-size characteristics.GEOLOGICAL JOURNAL,54(4),2495-2507.
MLA Wang, Gen,et al."High-resolution paleoclimatic records spanning the past 30 cal ka BP inferred from Qionghai Lake sediments in south-west China: Insights from geochemical investigations and grain-size characteristics".GEOLOGICAL JOURNAL 54.4(2019):2495-2507.
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