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Mid-Holocene moisture maximum revealed by pH changes derived from branched tetraethers in loess deposits of the northeastern Tibetan Plateau
Duan, YW (Duan, Yanwu)1; Sun, Q (Sun, Qing)2; Werne, JP (Werne, Josef P.)3; Zhao, H (Zhao, Hui)4; Zhang, DJ (Zhang, Dongju)1; Zhang, NM (Zhang, Naimeng)1; Liu, JB (Liu, Jianbao)1,5; Wu, D (Wu, Duo)1; Chen, FH (Chen, Fahu)1,5
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
2019
Volume520Issue:0Pages:138-149
DOI10.1016/j.palaeo.2019.01.034
Abstract

The patterns of Holocene moisture variability inferred from different proxies remain controversial in the northeastern Tibetan Plateau (NETP), which impedes our understanding of the behavior and dynamics of the East Asian Summer Monsoon (EASM). Here we present two pH records spanning the last similar to 12 kyr from well-dated loess-paleosol sections (YWY14 and SHD09) from the NETP. Based on the modified cyclization ratio index (CBT') of the branched glycerol dialkyl glycerol tetraethers (brGDGTs) and regional CBT'-pH empirical relationship, the reconstructed pH values from topmost samples are consistent with the instrumental pH values of the surrounding surface soil. Our results illustrate generally similar pH trends from two loess sections characterized by alkaline conditions from 12.0 to 8.5 cal kyr BP, neutral or acidic during the mid-Holocene and alkaline conditions again during the late Holocene. The intervals of lowest CBT'-derived pH values during the mid-Holocene in our records correlate with those of highest tree pollen percentage from adjacent lake sediments and the regionally weakest aeolian activity from records of paleosol development synthesized from the Chinese Loess Plateau (CLP) in northern China, suggesting a moisture maximum during that period. Taken together, we conclude that CBT'-derived pH variability can be potentially used as an indicator of EASM evolution and the wettest climate occurred during the mid-Holocene in the NETP. The changes in summer precipitation during the Holocene on the NETP can be attributed to the interaction between the mid-latitude westerlies and the EASM circulation.

Subject AreaGeosciences
WOS IDWOS:000463125100011
Language英语
Indexed BySCI
KeywordAsian Summer Monsoon Dialkyl Glycerol Tetraethers Qinghai Lake Area Oxygen-isotope Record Soil-ph Membrane-lipids Gonghe Basin Precipitation Variability Environmental Controls Last Deglaciation
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
Cooperation Status国际
ISSN0031-0182
Department高寒生态与人类适应
URL查看原文
PublisherELSEVIER
SubtypeArticle
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9336
Collection图书馆
Corresponding AuthorSun, Q (Sun, Qing); Chen, FH (Chen, Fahu)
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China;
2.Natl Res Ctr Geoanal, Beijing 100037, Peoples R China;
3.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA;
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China;
5.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Inst Tibetan Plateau Reseacrh, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Duan, YW ,Sun, Q ,Werne, JP ,et al. Mid-Holocene moisture maximum revealed by pH changes derived from branched tetraethers in loess deposits of the northeastern Tibetan Plateau[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2019,520(0):138-149.
APA Duan, YW .,Sun, Q .,Werne, JP .,Zhao, H .,Zhang, DJ .,...&Chen, FH .(2019).Mid-Holocene moisture maximum revealed by pH changes derived from branched tetraethers in loess deposits of the northeastern Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,520(0),138-149.
MLA Duan, YW ,et al."Mid-Holocene moisture maximum revealed by pH changes derived from branched tetraethers in loess deposits of the northeastern Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 520.0(2019):138-149.
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