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DOI10.1016/j.quascirev.2017.10.036
Contrasting early Holocene temperature variations between monsoonal East Asia and westerly dominated Central Asia
Zhao, Jiaju; An, Chen-Bang; Huang, Yongsong; Morrill, Carrie; Chen, Fa-Hu
发表日期2017
ISSN0277-3791
卷号178页码:14-23
英文摘要

Numerous 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 similar to 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 similar to 9 degrees 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 similar to 4 degrees 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. (C) 2017 Elsevier Ltd. All rights reserved.


英文关键词Paleotemperature reconstructions;Alkenone;Central Asia;Lake Balikun
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000418974100002
来源期刊QUATERNARY SCIENCE REVIEWS
来源机构兰州大学 ; 中国科学院青藏高原研究所
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/1747
推荐引用方式
GB/T 7714
Zhao, Jiaju,An, Chen-Bang,Huang, Yongsong,et al. Contrasting early Holocene temperature variations between monsoonal East Asia and westerly dominated Central Asia[J]. 兰州大学, 中国科学院青藏高原研究所,2017,178:14-23.
APA Zhao, Jiaju,An, Chen-Bang,Huang, Yongsong,Morrill, Carrie,&Chen, Fa-Hu.(2017).Contrasting early Holocene temperature variations between monsoonal East Asia and westerly dominated Central Asia.QUATERNARY SCIENCE REVIEWS,178,14-23.
MLA Zhao, Jiaju,et al."Contrasting early Holocene temperature variations between monsoonal East Asia and westerly dominated Central Asia".QUATERNARY SCIENCE REVIEWS 178(2017):14-23.
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