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Contrasting early Holocene temperature variations betweenmonsoonal East Asia and westerly dominated Central Asia
Zhao,JJ(Zhao,Jiaju)1; An,CB(An,Chenbang)1; Huang,YS(Huang,Yongsong)2,4; Morrill, C(Morrill, Carrie)3; Chen,FH(Chen,Fa-Hu)1; An,Chenbang
Source PublicationQuaternary Science Reviews
AbstractNumerous studies have demonstrated that there are major differences in the timing of maximum Holocene precipitation between the monsoonal East Asia and westerly dominated Central Asia, but it is unclear if the moisture differences are also associated with corresponding temperature contrasts. Here we present the first alkenone-based paleotemperature reconstructions for the past 21 kyr from Lake Balikun, central Asia. We show, unlike the initiation of Holocene warm conditions at ∼11 kyr BP in the monsoon regions, the arid central Asia remained in a glacial-like cold condition prior to 8 kyr BP and experienced abrupt warming of ∼9 °C after the collapse of the Laurentide ice sheet. Comparison with pollen and other geochemical data indicates the abrupt warming is closely associated with major increase in the moisture supply to the region. Together, our multiproxy data indicate ∼2 thousand years delay of temperature and moisture optimum relative to local summer insolation maximum, suggesting major influence of the Laurentide ice sheet and other high latitude ice sheet forcings on the regional atmospheric circulation. In addition, our data reveal a temperature drop by ∼4 °C around 4 kyr BP lasting multiple centuries, coinciding with severe increases in aridity previously reported based on multiproxy data. In contrast, model simulations display a much less pronounced delay in the initiation of Holocene warm conditions, raising unresolved questions about the relative importance of local radiative forcing and high-latitude ice on temperature in this region.
KeywordPaleotemperature Reconstructions Alkenone Central Asia Lake Balikun
Indexed BySCI
Project Number41671189 ; 41372180 ; ATM-0902805
Funding OrganizationNational Natural ScienceFoundation of China ; National Natural ScienceFoundation of China ; National Science Foundation ; National Science Foundation
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Cited Times:36[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorAn,Chenbang
Affiliation1.Key Laboratory of Western China's Environmental Systems, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
2.Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, United States
3.Cooperative Institute for Research in Environmental Sciences, University of Colorado and NOAA National Climatic Data Center, Boulder, CO 80305, UnitedStates
4.Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China
Recommended Citation
GB/T 7714
Zhao,JJ,An,CB,Huang,YS,et al. Contrasting early Holocene temperature variations betweenmonsoonal East Asia and westerly dominated Central Asia[J]. Quaternary Science Reviews,2017,178(2017):14-23.
APA Zhao,JJ,An,CB,Huang,YS,Morrill, C,Chen,FH,&An,Chenbang.(2017).Contrasting early Holocene temperature variations betweenmonsoonal East Asia and westerly dominated Central Asia.Quaternary Science Reviews,178(2017),14-23.
MLA Zhao,JJ,et al."Contrasting early Holocene temperature variations betweenmonsoonal East Asia and westerly dominated Central Asia".Quaternary Science Reviews 178.2017(2017):14-23.
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