气候变化领域集成服务门户(CCPortal): 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

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DOI	10.1177/0309133319896338
	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, Zhiping; Liu, Jianbao; Liu, Xiaokang; Chen, Shengqian; Yu, Ailing; Zhang, Xiaosen; Chen, Jie; Shen, Zhongwei; Chen, Jie; Zhang, Shanjia; Xia, Huan; Chen, Fahu
通讯作者	Liu, JB (通讯作者)
发表日期	2020
ISSN	0309-1333
EISSN	1477-0296
起始页码	572
结束页码	588
卷号	44 期号:4
英文摘要	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.
关键词	TIBETAN PLATEAU STABLE-ISOTOPES HOLOCENE MOISTURE INNER-MONGOLIA DELTA-O-18 QINGHAI CHINA SEDIMENTS VARIABILITY PRECIPITATION
英文关键词	Lake-water oxygen isotope; precipitation oxygen isotope; seasonal variations; East Asian summer monsoon region; climatic variables
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000506779700001
来源期刊	PROGRESS IN PHYSICAL GEOGRAPHY-EARTH AND ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259805
推荐引用方式 GB/T 7714	Zhang, Zhiping,Liu, Jianbao,Liu, Xiaokang,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]. 中国科学院青藏高原研究所,2020,44(4).
APA	Zhang, Zhiping.,Liu, Jianbao.,Liu, Xiaokang.,Chen, Shengqian.,Yu, Ailing.,...&Chen, Fahu.(2020).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,44(4).
MLA	Zhang, Zhiping,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 44.4(2020).