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A new approach for reconstructing Holocene temperatures from a multi-species long chain alkenone record from Lake Qinghai on the northeastern Tibetan Plateau
Wang, Zheng1; Liu, Zhonghui2; Zhang, Fan3; Fu, Mingyi1; An, Zhisheng1
2015-11-01
Source PublicationORGANIC GEOCHEMISTRY
Volume88Issue:2015Pages:50-58
SubtypeArticle
Abstract

The extent of unsaturation in long chain alkenones (LCKs) in lakes has potential for quantitatively indicating paleotemperature in terrigenous environments. However, the traditional temperature proxies derived from marine LCKs may not be able to address the problem related to the prevalent species effect, which restricts the application of LCKs in lacustrine studies. In our LCK record from the northeastern Tibetan Plateau, C-37/C-38 differences revealed that the LCK producer species in Lake Qinghai may have changed during the Holocene. This possible species effect may have caused inconsistency between the U-37(K') and U-37(K) records. Therefore, we formulated a new proxy, U-37(Ks), with a parameter "s" to indicate the different exponential response in LCK unsaturation to temperature change in multiple species. Our U-37(Ks)-derived temperature time series resembles the general temperature trends of the Northern Hemisphere on a millennial scale, while exhibiting several apparent cold events, especially at ca. 9 ka. The result shows that the Holocene optimum in Lake Qinghai was interrupted by cold events in the early Holocene. This could be a result of a weak Asia summer monsoon and cold air transmission in the North Atlantic. (C) 2015 Elsevier Ltd. All rights reserved.

KeywordLcks Lake Qinghai Species Effect
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.orggeochem.2015.08.006
WOS KeywordEmiliania-huxleyi ; Isochrysis-galbana ; Gephyrocapsa-oceanica ; Growth Temperature ; Carbon Isotopes ; Ice-age ; Salinity ; Distributions ; Sediments ; China
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000363272900005
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5059
Collection加速器质谱中心
Affiliation1.Chinese Acad Sci, IEE, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
3.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zheng,Liu, Zhonghui,Zhang, Fan,et al. A new approach for reconstructing Holocene temperatures from a multi-species long chain alkenone record from Lake Qinghai on the northeastern Tibetan Plateau[J]. ORGANIC GEOCHEMISTRY,2015,88(2015):50-58.
APA Wang, Zheng,Liu, Zhonghui,Zhang, Fan,Fu, Mingyi,&An, Zhisheng.(2015).A new approach for reconstructing Holocene temperatures from a multi-species long chain alkenone record from Lake Qinghai on the northeastern Tibetan Plateau.ORGANIC GEOCHEMISTRY,88(2015),50-58.
MLA Wang, Zheng,et al."A new approach for reconstructing Holocene temperatures from a multi-species long chain alkenone record from Lake Qinghai on the northeastern Tibetan Plateau".ORGANIC GEOCHEMISTRY 88.2015(2015):50-58.
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