globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.09.005
论文题名:
An 8,600 year lacustrine record of summer monsoon variability from Yunnan, China
作者: Hillman A.L.; Abbott M.B.; Finkenbinder M.S.; Yu J.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 174
起始页码: 120
结束页码: 132
语种: 英语
英文关键词: China ; Holocene ; Indian Summer Monsoon ; Paleolimnology ; Stable isotopes
Scopus关键词: Isotopes ; Lakes ; Paleolimnology ; China ; East Asian summer monsoon ; Holocenes ; Indian summer monsoon ; Precipitation patterns ; Quantitative estimates ; Stable isotopes ; Stable oxygen isotopes ; Atmospheric thermodynamics
英文摘要: Interactions between the Indian Summer Monsoon (ISM) and East Asian Summer Monsoon (EASM) are complex, yet needed to provide a long-term perspective of precipitation patterns in southeast Asia. Here we present an 8600-year sediment record from Xingyun Lake in Yunnan, China, a transitional zone that receives inputs of precipitation from both the ISM and EASM. Analysis of stable oxygen isotopes (δ18O) from authigenic calcite yields a semi-quantitative estimate of the timing and magnitude of lake level change that reflects changes in effective moisture from monsoon variability. Between 8600 and 6900 years BP, δ18O values are stable and low, indicating high lake levels and overflowing conditions resulting from a strong ISM. After 6900 years BP, δ18O values shift to higher values, which we suggest reflects a weakening of the ISM caused by declining summer insolation. The most substantial positive shift in isotopes occurs from 5000 to 4300 years BP and is coincident with aridity in India and the Tibetan Plateau. Other proxy records indicate increased ENSO variability and a southward shift in the ITCZ, which has an effect on the strength and onset of the ISM and may account for this change in hydrologic balance. After 4300 years BP, δ18O values continue to increase reflecting a gradual drying trend, but increases are smaller than prior periods, in part due to lake bathymetry that limits the potential for isotopic enrichment driven by evaporation. The relative influence of the ISM and EASM in the Yunnan Province of China during the Holocene remains a topic for future study, but our results suggest the predominance of the ISM and a possible connection to ENSO patterns on centennial to millennial timescales. © 2017 Elsevier Ltd
资助项目: Hillman, A.L. ; Department of Environmental Science, School of Geosciences, University of Louisiana at Lafayette, 611 McKinley St, United States ; 电子邮件: aubrey.hillman@louisiana.edu
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59092
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Department of Environmental Science, School of Geosciences, University of Louisiana at Lafayette, 611 McKinley St, Lafayette, LA, United States; Department of Geology and Environmental Science, University of Pittsburgh, 4107 O'Hara St, Pittsburgh, PA, United States; Department of Environmental Engineering and Earth Science, Wilkes University, 84 West South St, Wilkes-Barre, PA, United States; Qinghai Institute of Salt Lake Studies, Chinese Academy of Sciences, 18 Xinning Rd, Xining, Qinghai, China

Recommended Citation:
Hillman A.L.,Abbott M.B.,Finkenbinder M.S.,et al. An 8,600 year lacustrine record of summer monsoon variability from Yunnan, China[J]. Quaternary Science Reviews,2017-01-01,174
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Hillman A.L.]'s Articles
[Abbott M.B.]'s Articles
[Finkenbinder M.S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Hillman A.L.]'s Articles
[Abbott M.B.]'s Articles
[Finkenbinder M.S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Hillman A.L.]‘s Articles
[Abbott M.B.]‘s Articles
[Finkenbinder M.S.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.