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Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records
Zhang, ZP (Zhang, Zhiping)1; Liu, JB (Liu, Jianbao)1,2; Liu, XK (Liu, Xiaokang)3; Chen, SQ (Chen, Shengqian)1; Yu, AL (Yu, Ailing)1; Zhang, XS (Zhang, Xiaosen)4; Chen, J (Chen, Jie)1; Shen, ZW (Shen, Zhongwei)1; Chen, J (Chen, Jie)1; Zhang, SJ (Zhang, Shanjia)1; Xia, H (Xia, Huan)1; Chen, FH (Chen, Fahu)1
Source PublicationPROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT
2019
Volume0Issue:0Pages:0 309133319896338
DOI10.1177/0309133319896338
Abstract

The scarcity of modern process studies of the relationship between climatic variables and lake-water oxygen isotope (delta O-18(LW)) composition has restricted our understanding of the climatic significance of oxygen isotope (delta O-18) records from lake sediments. We measured changes in delta O-18(LW) at four lakes (Nanyihu, Gonghai, Mayinghai and Xihaizi) at various locations across the East Asian summer monsoon (EASM) region, from December 2016 to January 2018. The variations in delta O-18(LW) at Lake Nanyihu, located in the lower reach of the Yangtze River, are controlled by precipitation oxygen isotope (delta O-18(P)) composition, temperature and evaporation during the non-monsoon season. However, the variations in delta O-18(LW) at the lakes close to the northern limit of the EASM (Gonghai, Mayinghai and Xihaizi) are affected not only by delta O-18(P), temperature and evaporation, but also by the replenishment of groundwater during the non-monsoon season. In general, during the non-monsoon season, the variation of delta O-18(LW) exhibits a variety of patterns and the controlling factors across the EASM region are complex. During the monsoon season, although the effect of evaporation-induced isotopic enrichment still affects delta O-18(LW), the variations in delta O-18(LW) are more influenced by the supply of abundant precipitation with lower delta O-18(P) to the lakes, which caused a substantial decrease in delta O-18(LW) across the EASM region in this season. Therefore, the variations in delta O-18(LW) mainly reflect the delta O-18(P) of the EASM during the monsoon season. However, the timing of the peak in monsoon precipitation does not correspond well to minima in delta O-18(LW), and correlation analysis reveals that there is only a weak relationship between delta O-18(LW) and precipitation/humidity at all four lakes during the monsoon season. These findings demonstrate that although delta O-18(LW) can represent the delta O-18(P) of the EASM, it does not reflect precipitation/humidity during the monsoon season. Overall, our findings indicate that the seasonal variations of delta O-18(LW) across the EASM region are controlled by different climatic variables, which implies that the interpretation of lacustrine delta O-18 records across the EASM region as an indicator of regional effective precipitation/humidity needs to be reassessed.

Subject AreaGeosciences
WOS IDWOS:000506779700001
Language英语
Indexed BySCI
KeywordTibetan Plateau Stable-isotopes Holocene Moisture Inner-mongolia Delta-o-18 Qinghai China Sediments Variability Precipitation
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国内
ISSN0309-1333
Department生态重点实验室
URL查看原文
PublisherSAGE PUBLICATIONS LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9039
Collection中国科学院青藏高原研究所
Corresponding AuthorLiu, JB (Liu, Jianbao)
Affiliation1.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing, Peoples R China;
4.Shanxi Univ, Inst Loess Plateau, Taiyuan, Peoples R China.
Recommended Citation
GB/T 7714
Zhang, ZP ,Liu, JB ,Liu, XK ,et al. Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records[J]. PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT,2019,0(0):0 309133319896338.
APA Zhang, ZP .,Liu, JB .,Liu, XK .,Chen, SQ .,Yu, AL .,...&Chen, FH .(2019).Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records.PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT,0(0),0 309133319896338.
MLA Zhang, ZP ,et al."Seasonal variations in the lake-water oxygen isotope composition of four lakes in the East Asian summer monsoon region: Implications for the interpretation of paleo-isotope records".PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT 0.0(2019):0 309133319896338.
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