干旱区生态环境知识资源中心(Arid): Millennial- and centennial-scale droughts at the northern margin of the East Asian summer monsoon during the last deglaciation: Sedimentological evidence from Dali Lake

Arid

DOI	10.1016/j.palaeo.2018.11.001
	Millennial- and centennial-scale droughts at the northern margin of the East Asian summer monsoon during the last deglaciation: Sedimentological evidence from Dali Lake
	Fan, Jiawei 1,2; Xiao, Jule 1,2,3; Qin, Xiaoguang 1,2
通讯作者	Fan, Jiawei
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	514 页码:361-372
英文摘要	The semi-arid areas at the northern margin of the East Asian summer monsoon (EASM) have experienced an increased frequency of drought in recent decades. However, it is unclear whether past monsoonal precipitation in the region were determined mainly by El Nino-Southern Oscillation (ENSO) variability or high-latitude cooling. In this study, we use a high-resolution grain-size dataset combined with a new Bayesian age depth model of a sediment core from Dali Lake to analyze the occurrence of millennial- and centennial-scale droughts at the EASM margin during the interval of climatic warming during the last deglaciation. The polymodal grain size distributions are partitioned using a log-normal distribution function fitting method. High percentages of the coarse components (C4 + C5 + C6) are recognized as proxy indicators of strong aeolian activities and low lake levels, and thus droughts in the region. The drought events indicated thereby are generally accompanied by decreases in regional temperature, catchment surface runoff and bio-productivity, on both millennial and centennial timescales. These results imply that the droughts at the EASM margin were caused by a significantly weakened EASM intensity. In addition, the droughts may be linked, within the age uncertainties, to the Heinrich 1 (H1) and Younger Dryas (YD) events on millennial timescales, and to the Older Dryas (OD) cold event on centennial timescales, implying strong high-latitude forcing. Given that these cold reversals over northern high latitudes were induced by the rapid input of glacial melt-water to the North Atlantic during the last deglaciation, it is possible that ongoing climatic warming, and the resulting high northern-latitude ice-sheet melting, may cause an increased incidence of drought in northern China.
英文关键词	Bayesian age depth model Log-normal distribution Grain-size components Lake level Aeolian activity Northern China
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000456355800027
WOS关键词	GRAIN-SIZE DISTRIBUTION ; TIBETAN PLATEAU ; YOUNGER DRYAS ; SOUTH CHINA ; DEPOSITIONAL PROCESSES ; CLIMATE CHANGES ; INNER-MONGOLIA ; OXYGEN-ISOTOPE ; EARLY HOLOCENE ; SEDIMENTS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
来源机构	中国科学院地质与地球物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217856
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China; 2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China; 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fan, Jiawei,Xiao, Jule,Qin, Xiaoguang. Millennial- and centennial-scale droughts at the northern margin of the East Asian summer monsoon during the last deglaciation: Sedimentological evidence from Dali Lake[J]. 中国科学院地质与地球物理研究所,2019,514:361-372.
APA	Fan, Jiawei,Xiao, Jule,&Qin, Xiaoguang.(2019).Millennial- and centennial-scale droughts at the northern margin of the East Asian summer monsoon during the last deglaciation: Sedimentological evidence from Dali Lake.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,514,361-372.
MLA	Fan, Jiawei,et al."Millennial- and centennial-scale droughts at the northern margin of the East Asian summer monsoon during the last deglaciation: Sedimentological evidence from Dali Lake".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 514(2019):361-372.