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 Publication | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY |
2019 | |
Volume | 520Issue:0Pages:138-149 |
DOI | 10.1016/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 Area | Geosciences |
WOS ID | WOS:000463125100011 |
Language | 英语 |
Indexed By | SCI |
Keyword | Asian 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 Area | Physical Geography ; Geology ; Paleontology |
WOS Subject | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
Cooperation Status | 国际 |
ISSN | 0031-0182 |
Department | 高寒生态与人类适应 |
URL | 查看原文 |
Publisher | ELSEVIER |
Subtype | Article |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itpcas.ac.cn/handle/131C11/9336 |
Collection | 图书馆 |
Corresponding Author | Sun, Q (Sun, Qing); Chen, FH (Chen, Fahu) |
Affiliation | 1.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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