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Mid- to late-Holocene paleoenvironmental changes inferred from organic geochemical proxies in Lake Tangra Yumco, Central Tibetan Plateau
Wang, Y (Wang, Yong)1,2,3; Wang, JB (Wang, Junbo)1; Zhu, LP (Zhu, Liping)1,3; Lin, X (Lin, Xiao)4; Hu, JF (Hu, Jianfang)5; Ma, QF (Ma, Qingfeng)1; Ju, JT (Ju, Jianting)1; Peng, P (Peng, Ping)1; Yang, RM (Yang, Ruimin)1; Wang, Y; Wang, JB
Source PublicationHOLOCENE
2017
Volume27Issue:10Pages:1475-1486
DOI10.1177/0959683617693893
AbstractInvestigations of the paleoclimate and paleoenvironmental changes in the Tibetan Plateau in recent years have led to many significant achievements. However, high-resolution lake records from the mid-to late-Holocene have not been determined for the Central Tibetan Plateau, which is in the transition zone between the Indian summer monsoon (ISM) system and the westerlies. In this study, we analyzed the distribution and compound-specific carbon isotope compositions (delta C-13) of sedimentary n-alkanes and the bulk sediment total organic matter (TOC), total nitrogen (TN), and C/N ratios to reconstruct the paleoenvironmental changes over the past 6 cal. ka BP using a 376-cm sediment core from the southern basin of Tangra Yumco, Central Tibetan Plateau. Our results indicated that clear stepwise decreases in lake productivity and lake level occurred during the mid-to late-Holocene based on decreases in delta C-13 values of mid-chain n-alkanes and Paq (an n-alkane-based proxy). Additionally, the variations in the TOC, TN, and C/N ratios revealed generally increased inputs of allochthonous organic matter over the past 6 cal. ka BP. When our findings at Tangra Yumco were compared with records from the Central Tibetan Plateau and adjacent regions, we found generally consistent patterns of lake environmental changes over the past 6 cal. ka BP, suggesting that the climate of the Central Tibetan Plateau was primarily influenced by the ISM system at the millennial time scale. Therefore, our results depict the evolution of the ISM over the past 6 cal. ka BP in the Central Tibetan Plateau, which corresponds to summer solar insolation and the migrations of the Intertropical Convergence Zone (ITCZ). We also propose that the climate of the North Atlantics influenced the climate of the Central Tibetan Plateau through some indirect climatic mechanisms.
Subject Area自然地理学
WOS IDWOS:000412720200005
Language英语
Indexed BySCI
KeywordNorth-atlantic Climate Ocean Summer Monsoon Intertropical Convergence Zone Arid Central-asia Nam-co Environmental-changes Indian Monsoon Level Changes N-alkanes Mt. Kenya
WOS Research AreaPhysical Geography; Geology
WOS SubjectGeography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
Cooperation Status国内
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7973
Collection图书馆
Corresponding AuthorWang, Y; Wang, JB
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Bldg 3,Courtyard 16,Lincui Rd, Beijing 100101, Peoples R China.
2.Anhui Normal Univ, Coll Terr Resources & Tourism, Wuhu, Anhui, Peoples R China.
3.CAS Ctr Excellence Tibetan Plateau Earth Syst, Beijing, Peoples R China.
4.China Univ Geosci, Minist Educ, Key Lab Biogeol & Environm Geol, Beijing, Peoples R China.
5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Y ,Wang, JB ,Zhu, LP ,et al. Mid- to late-Holocene paleoenvironmental changes inferred from organic geochemical proxies in Lake Tangra Yumco, Central Tibetan Plateau[J]. HOLOCENE,2017,27(10):1475-1486.
APA Wang, Y .,Wang, JB .,Zhu, LP .,Lin, X .,Hu, JF .,...&Wang, JB.(2017).Mid- to late-Holocene paleoenvironmental changes inferred from organic geochemical proxies in Lake Tangra Yumco, Central Tibetan Plateau.HOLOCENE,27(10),1475-1486.
MLA Wang, Y ,et al."Mid- to late-Holocene paleoenvironmental changes inferred from organic geochemical proxies in Lake Tangra Yumco, Central Tibetan Plateau".HOLOCENE 27.10(2017):1475-1486.
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