气候变化领域集成服务门户(CCPortal): Synchronous change of temperature and moisture over the past 50 ka in subtropical southwest China as indicated by biomarker records in a crater lake

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DOI	10.1016/j.quascirev.2019.04.003
	Synchronous change of temperature and moisture over the past 50 ka in subtropical southwest China as indicated by biomarker records in a crater lake
	Tian L.; Wang M.; Zhang X.; Yang X.; Zong Y.; Jia G.; Zheng Z.; Man M.
发表日期	2019
ISSN	0277-3791
起始页码	121
结束页码	134
卷号	212
英文摘要	Over the past few decades, studies on the Indian Summer Monsoon (ISM) have been mainly based on paleo-marine records whilst the sparsity of land records limits our understanding of the ISM evolutionary process over continental landscapes. Here, we provide paleoclimate reconstructions based on n-alkanes and branched glycerol dialkyl glycerol tetraethers (brGDGTs) from a 50-ka lacustrine sediment core collected from Lake Tengchong Qinghai in southwestern subtropical China. Our results reveal that the botanical sources of sedimentary n-alkanes in this lake are mainly from aquatic macrophytes and terrestrial plants. The lake level evolution from the MIS 3 to the Holocene can be divided into four stages: high in the MIS 3, low in the LGM, high in last deglacial and low in mid and late Holocene. Our brGDGTs-based climate reconstructions indicate that the mean air temperature differences between the present-day and the LGM were up to about 3–4 °C. From MIS 3 to Holocene, there was a broadly and consistently synchronous trend between precipitation and air temperature in this ISM region. This is different from the asynchronous temperature and precipitation variations in the East Asian Summer Monsoon (EASM) regions in the period of last glacial termination. Our study shows that the climate in ISM regions was primarily driven by changes in June summer solar insolation at 30°N, and those glacial boundary conditions such as ice volume and sea surface temperature might also have affected the ISM. © 2019
英文关键词	Branched GDGTs; Indian summer monsoon; Lake level; n-Alkanes; Paleoclimate reconstructions; Southwestern subtropical China
语种	英语
scopus关键词	Atmospheric temperature; Atmospheric thermodynamics; Glacial geology; Glycerol; Oceanography; Paraffins; Plants (botany); Repair; Tropics; Branched GDGTs; Indian summer monsoon; Lake levels; n-Alkanes; Paleoclimate reconstruction; Subtropical China; Lakes; air temperature; alkane; biomarker; boundary condition; core analysis; crater lake; Holocene; lacustrine deposit; lake level; moisture content; monsoon; paleoclimate; reconstruction; sea surface temperature; subtropical region; China; Qinghai; Tengchong; Yunnan
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151944
作者单位	Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China; Department of Earth Sciences, The University of Hong Kong, Hong Kong SAR, Hong Kong; School of Ocean and Earth Science, Tongji University, Shanghai, China
推荐引用方式 GB/T 7714	Tian L.,Wang M.,Zhang X.,et al. Synchronous change of temperature and moisture over the past 50 ka in subtropical southwest China as indicated by biomarker records in a crater lake[J],2019,212.
APA	Tian L..,Wang M..,Zhang X..,Yang X..,Zong Y..,...&Man M..(2019).Synchronous change of temperature and moisture over the past 50 ka in subtropical southwest China as indicated by biomarker records in a crater lake.Quaternary Science Reviews,212.
MLA	Tian L.,et al."Synchronous change of temperature and moisture over the past 50 ka in subtropical southwest China as indicated by biomarker records in a crater lake".Quaternary Science Reviews 212(2019).