气候变化领域集成服务门户(CCPortal): Pliocene-Pleistocene stepwise drying of Central Asia: Evidence from paleomagnetism and sporopollen record of the deep borehole SG-3 in the western Qaidam Basin, NE Tibetan Plateau

CCPortal

DOI	10.1016/j.gloplacha.2012.07.002
	Pliocene-Pleistocene stepwise drying of Central Asia: Evidence from paleomagnetism and sporopollen record of the deep borehole SG-3 in the western Qaidam Basin, NE Tibetan Plateau
	Cai, Maotang; Fang, Xiaomin; Wu, Fuli; Miao, Yunfa; Appel, Erwin
通讯作者	Fang, XM (通讯作者)
发表日期	2012
ISSN	0921-8181
EISSN	1872-6364
起始页码	72
结束页码	81
卷号	94-95
英文摘要	Drying of the Asian interior has generally been linked to Tibetan Plateau uplift, retreat of the Para-Tethys Sea and global cooling. However, lack of detailed aridification records hinders elucidation of how drying is controlled by these factors and to what extent each factor contributes. In this study, a 600 m deep core (SG-3) of lacustrine-playa deposits was obtained from the western Qaidam Basin, NE Tibetan Plateau for pollen analysis. Magnetostratigraphic dating of the core determines its age at ca. 3.1-0.01 Ma. The palynologic compositions show that a steppe to desert vegetation predominates the core. Artemisia-dominated steppe representative of relative warm and wet climate before 2.6 Ma changed to Chenopodiaceae-dominated steppe desert under drier climate conditions between 2.6 Ma and 0.9 Ma, interrupted by a short moister interval of Artemisia-dominated steppe at 1.8-1.2 Ma. From 0.9 Ma to 0.6 Ma, Chenopodiaceae-Ephedraceae desert vegetation started to develop, and since 0.6 Ma, Ephedraceae-dominated desert prevailed. This vegetation change in the western Qaidam Basin suggests a stepwise long-term aridification of the central Asia inland beginning at ca. 2.6 Ma, 1.2 Ma, 0.9 Ma and 0.6 Ma since the late Pliocene, most probably as a response to both long-term global cooling and Tibetan Plateau uplift at those times. (C) 2012 Elsevier B.V. All rights reserved.
关键词	RESOLUTION MAGNETO STRATIGRAPHY POLLEN RECORD ECOLOGICAL SIGNIFICANCE VEGETATION CHANGES DESERT VEGETATION QINGHAI PROVINCE SURFACE POLLEN INNER-MONGOLIA LOESS DEPOSITS CLIMATE-CHANGE
英文关键词	Qaidam Basin; Sporopollen; Aridification; Global cooling; Tibet Plateau uplift
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000308388000007
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	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/258013
推荐引用方式 GB/T 7714	Cai, Maotang,Fang, Xiaomin,Wu, Fuli,et al. Pliocene-Pleistocene stepwise drying of Central Asia: Evidence from paleomagnetism and sporopollen record of the deep borehole SG-3 in the western Qaidam Basin, NE Tibetan Plateau[J]. 中国科学院青藏高原研究所,2012,94-95.
APA	Cai, Maotang,Fang, Xiaomin,Wu, Fuli,Miao, Yunfa,&Appel, Erwin.(2012).Pliocene-Pleistocene stepwise drying of Central Asia: Evidence from paleomagnetism and sporopollen record of the deep borehole SG-3 in the western Qaidam Basin, NE Tibetan Plateau.GLOBAL AND PLANETARY CHANGE,94-95.
MLA	Cai, Maotang,et al."Pliocene-Pleistocene stepwise drying of Central Asia: Evidence from paleomagnetism and sporopollen record of the deep borehole SG-3 in the western Qaidam Basin, NE Tibetan Plateau".GLOBAL AND PLANETARY CHANGE 94-95(2012).