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Glaciochemical records for the past century from the Qiangtang Glacier No.1 ice core on the central Tibetan Plateau: Likely proxies for climate and atmospheric circulations
Wang, C (Wang, Cheng)1,2; Tian, LD (Tian, Lide)1,3,4; Shao, LL (Shao, Lili)1,2; Li, Y (Li, Yao)1,2
Source PublicationATMOSPHERIC ENVIRONMENT
2019
Volume197Issue:0Pages:66-76
DOI10.1016/j.atmosenv.2018.10.028
Abstract

Previous studies of glaciochemical records retrieved from the southern and northern sectors of the Tibetan Plateau (TP) have revealed that there are diverse patterns of climate change within this region. However, uncertainty remains regarding changes in the atmospheric environment over the central TP where the Indian monsoonal circulation and westerly winds meet. This study presents a glaciochemical record of the past 112 years from the upper part of the ice core drilled into the Qiangtang Glacier No.1 (QT-1) located in the central TP. The purpose of this study is to understand the glaciochemical controls, if any, and how these controls have been affected by both local climate parameters and atmospheric circulation patterns. An empirical orthogonal function (EOF) analysis was performed to determine the significance of any chemical components. The results show that the major soluble ions (Na+, K+, Mg2+, Ca2+, Cl-, NO3-, NH4+ and SO42-) are predominantly controlled by crustal aerosols and have high loadings on EOF1. Correlation analysis between EOF1 and the annual dust-event frequency recorded by local/regional meteorological stations suggests that the ice core chemical record provides a reasonable proxy for local/regional atmospheric dust loading. Analysis of EOF1 also demonstrates changes that are consistent with regional meteorological parameters and large-scale circulations, revealing a strong link with the glaciochemical record. The windy, cold-dry climate and/or enhanced northwesterly/westerly winds appear to be responsible for the higher atmospheric dust aerosols, leading to higher concentrations of ions. Our analysis also isolated a significant positive correlation between EOF1 and the Pacific Decadal Oscillation (PDO) index, suggesting that, as an underlying mechanism, the PDO likely influences the regional climate conditions and atmospheric circulation patterns and thereby the QT-1 ion records. Our findings may, therefore, enhance the understanding of the relationship between chemical records and climatological variations that are preserved in ice cores, improve our knowledge of changes in the composition of the atmosphere and atmospheric circulation over the central TP, and potentially facilitate reconstruction of the paleo-PDO.

Subject AreaEnvironmental Sciences
WOS IDWOS:000451492400007
Language英语
Indexed BySCI
KeywordDust Event Frequency Summer Monsoon Chemical-composition Environmental Records Regional-distribution Ammonium Record Northern China Asian Monsoon Wind-speed Precipitation
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
Cooperation Status国内
ISSN1352-2310
Department环境变化与地表过程
URL查看原文
PublisherPERGAMON-ELSEVIER SCIENCE LTD
SubtypeArticle
Citation statistics
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9434
Collection图书馆
Corresponding AuthorTian, LD (Tian, Lide)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
3.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650091, Yunnan, Peoples R China;
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Wang, C ,Tian, LD ,Shao, LL ,et al. Glaciochemical records for the past century from the Qiangtang Glacier No.1 ice core on the central Tibetan Plateau: Likely proxies for climate and atmospheric circulations[J]. ATMOSPHERIC ENVIRONMENT,2019,197(0):66-76.
APA Wang, C ,Tian, LD ,Shao, LL ,&Li, Y .(2019).Glaciochemical records for the past century from the Qiangtang Glacier No.1 ice core on the central Tibetan Plateau: Likely proxies for climate and atmospheric circulations.ATMOSPHERIC ENVIRONMENT,197(0),66-76.
MLA Wang, C ,et al."Glaciochemical records for the past century from the Qiangtang Glacier No.1 ice core on the central Tibetan Plateau: Likely proxies for climate and atmospheric circulations".ATMOSPHERIC ENVIRONMENT 197.0(2019):66-76.
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