Climate instability during the last deglaciation in central Asia, reconstructed by pollen data from Yili Valley, NW China

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	Climate instability during the last deglaciation in central Asia, reconstructed by pollen data from Yili Valley, NW China
	Zhao, Keliang 1,2; Li, Xiaoqiang 1,2; Dodson, John 3; Zhou, Xinying 1,2; Atahan, Pia 3; lixiaoqiang@ivpp.ac.cn
	2013-02-15
发表期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
卷号	189 期号:0 页码:8-17
文章类型	Article
摘要	An extended pollen record with grain size analysis and AMS C-14 dating is provided for a palaeolake section which is located in an intermountain basin in Yili Valley, Xinjiang, NW China. Covering the late MIS 3, early MIS 2 and the last deglaciation, vegetation variations and climate events are discussed in relation to changes in pollen assemblages and Artemisia/Chenopodiaceae (A/C) ratios. The presence of montane forest-steppe dominated by Picea and Taraxacum indicates a relative humid climate in the study area during late MIS 3 (before 31.5 cal kyr BP). Picea forest disappeared and the vegetation dominated by Chenopodiaceae shows the climate became dry from 31.5 to 14.7 cal kyr BP. The sediments of Last Glacial Maximum (LGM) period are absent in the section probably. Betula-Picea mixed forest occurred at 14.7 cal kyr BP and corresponds to the onset of the warm Bolling period in the North Atlantic. A long dry period was detected from 14.5 to 13.6 cal kyr BP on the basis of the occurrence of Chenopodiaceae desert. A subalpine meadow community dominated by Geranium covered the area during 13.6-13.4 cal kyr BP, suggesting lower temperatures at this time. This may coincide with the Older Dryas (OD). The most humid period in the record occurred between 13.4 and 12.9 cal kyr BP, which coincides with the warm Allerod period. Dry conditions prevailed from similar to 12.9 to 11.7 cal kyr BP in the area, coinciding with the Younger Dryas (YD) in the North Atlantic. Within this period a three-phase climate fluctuation was detected, which can be summarized as follows: a dry early YD (12.9-12.6 cal kyr BP), a slightly moister mid-YD (12.6-12.0 cal kyr BP) and a very dry late YD (12.0-11.7 cal kyr BP). These millennial to century-scale climatic events in Yili Valley correlate well with other palaeoclimate records in North Hemisphere, suggesting that these events probably originate from same mechanisms. (C) 2012 Elsevier B.V. All rights reserved.
关键词	Yili Valley Central Asia Late Mis3 Last Deglaciation Bolling-allerod Warm Period Younger Dryas
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	ARID CENTRAL-ASIA ; TIBETAN PLATEAU ; NORTH-ATLANTIC ; YOUNGER DRYAS ; LAKE BAIKAL ; HIGH-RESOLUTION ; SEA-LEVEL ; MOISTURE EVOLUTION ; MONSOON CLIMATE ; GLACIAL PERIOD
收录类别	SCI
语种	英语
WOS研究方向	Plant Sciences ; Paleontology
WOS类目	Plant Sciences ; Paleontology
WOS记录号	WOS:000314431200002
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4211
专题	古人类及旧石器研究室
通讯作者	lixiaoqiang@ivpp.ac.cn
作者单位	1.Chinese Acad Sci, Lab Human Evolut, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Australian Nucl Sci & Technol Org, Inst Environm Res, Kirrawee, NSW 2232, Australia
推荐引用方式 GB/T 7714	Zhao, Keliang,Li, Xiaoqiang,Dodson, John,et al. Climate instability during the last deglaciation in central Asia, reconstructed by pollen data from Yili Valley, NW China[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2013,189(0):8-17.
APA	Zhao, Keliang,Li, Xiaoqiang,Dodson, John,Zhou, Xinying,Atahan, Pia,&lixiaoqiang@ivpp.ac.cn.(2013).Climate instability during the last deglaciation in central Asia, reconstructed by pollen data from Yili Valley, NW China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,189(0),8-17.
MLA	Zhao, Keliang,et al."Climate instability during the last deglaciation in central Asia, reconstructed by pollen data from Yili Valley, NW China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 189.0(2013):8-17.