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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

文献类型：期刊论文

作者Wang, Gen1; Wei, Zhifu1; Wang, Yongli1,2; Zhang, Ting1,3; He, Wei1,3; Sun, Zepeng1,3; Xu, Liang1,3; Gong, Juncheng1
刊名GEOLOGICAL JOURNAL
出版日期2019-07-01
卷号54期号:4页码:2495-2507
关键词grain size Late Quaternary paleoclimate south-west monsoon SW China
ISSN号0072-1050
DOI10.1002/gj.3308
英文摘要There 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.
WOS关键词INDIAN-SUMMER MONSOON ; NORTHWESTERN YUNNAN PROVINCE ; HOLOCENE VEGETATION HISTORY ; ALPINE LACUSTRINE RECORD ; NORTH-ATLANTIC OCEAN ; SOUTHWESTERN CHINA ; DALI LAKE ; LAST DEGLACIATION ; CLIMATE HISTORY ; TIBETAN PLATEAU
资助项目National 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]
WOS研究方向Geology
语种英语
WOS记录号WOS:000477016000037
出版者WILEY
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Western Light Project ; Key Laboratory Project of Gansu Province ; National Key R&D Program of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences Key Project ; Western Light Project ; Key Laboratory Project of Gansu Province
源URL[http://ir.iggcas.ac.cn/handle/132A11/92969]  
专题地质与地球物理研究所_兰州油气中心
地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Wei, Zhifu; Wang, Yongli
作者单位1.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
推荐引用方式
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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来源：地质与地球物理研究所

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