IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Moisture dynamics in central Asia for the last 15 kyr: new evidence from Yili Valley, Xinjiang, NW China
Li, XQ (Li, Xiaoqiang)[1,2]; Zhao, KL (Zhao, Keliang)[1,2]; Dodson, J (Dodson, John)[3]; Zhou, XY (Zhou, Xinying)[1,2]
2011-11-30
Source PublicationQUATERNARY SCIENCE REVIEWS
Volume30Issue:23-24Pages:3457-3466
Subtype期刊论文
Abstract

Based on high resolution palynological investigations and AMS(14)C dating, the continuous lacustrine sediments contained in Yili Valley, Xinjiang provide an opportunity to reconstruct the effective moisture changes for the last 15 kyr in central Asia. The relatively warm and humid climate of the Bolling-Allerod (15-12.9 cal kyr BP) is a generalization, but it seems to show some fluctuations. The time of the Younger Dryas (YD) interrupted the increasing trend of effective moisture in the study region, the climate was cold and relatively dry in the early YD period (12.9-12.0 cal kyr BP), whereas the desert vegetation community appeared around 11.8 cal kyr BP, almost the driest time since the 15 cal kyr BR A sharp increase in effective moisture marked the beginning of the Holocene in the Yili Valley. The early Holocene (10.6-7.6 cal kyr BP) was the wettest time with a developed temperate steppe. A dry climate with desert vegetation arose in the early mid-Holocene (7.6-6.5 cal kyr BP), spanning 1100 years. A second humid phase emerged between 6.5 and 5.2 cal kyr BP, whose vegetation community was represented by temperate steppe. Moisture was reduced again and the climate became drier between 5.2 and 3.3 cal kyr BP when vegetation was dominated by desert steppe in the Yili Valley. Regional comparisons indicate that the moisture changes in Yili Valley were mainly influenced by the North Atlantic Ocean SSTs through the westerlies. The mean position of the Siberian High Pressure cell probably made a great contribution to the drought between 7.6 and 6.5 cal kyr BP. The climate changes were generally consistent between the westerly-dominant central Asia and Asian monsoon regions since the last deglaciation, possibly forced by summer insolation conditions in the Northern Hemisphere.

KeywordMoisture evolution Yili valley Central Asia Last deglaciation Holocene Westerlies
DOI10.1016/j.quascirev.2011.09.010
Indexed BySCI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10306
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorLi, XQ (Li, Xiaoqiang)[1,2]
Affiliation1.The Laboratory of Human Evolution, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
3.Institute for Environmental Research, Australian Nuclear Science and Technology Organisation, Kirrawee, NSW 2232, Australia
Recommended Citation
GB/T 7714
Li, XQ ,Zhao, KL ,Dodson, J ,et al. Moisture dynamics in central Asia for the last 15 kyr: new evidence from Yili Valley, Xinjiang, NW China[J]. QUATERNARY SCIENCE REVIEWS,2011,30(23-24):3457-3466.
APA Li, XQ ,Zhao, KL ,Dodson, J ,&Zhou, XY .(2011).Moisture dynamics in central Asia for the last 15 kyr: new evidence from Yili Valley, Xinjiang, NW China.QUATERNARY SCIENCE REVIEWS,30(23-24),3457-3466.
MLA Li, XQ ,et al."Moisture dynamics in central Asia for the last 15 kyr: new evidence from Yili Valley, Xinjiang, NW China".QUATERNARY SCIENCE REVIEWS 30.23-24(2011):3457-3466.
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