气候变化领域集成服务门户(CCPortal): Prolonged Monsoonal Moisture Availability Preconditioned Glaciation of the Tibetan Plateau During the Mid-Pleistocene Transition

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DOI	10.1029/2018GL079303
	Prolonged Monsoonal Moisture Availability Preconditioned Glaciation of the Tibetan Plateau During the Mid-Pleistocene Transition
	Koutsodendris, Andreas; Sachse, Dirk; Appel, Erwin; Herb, Christian; Fischer, Tobias; Fang, Xiaomin; Pross, Joerg
通讯作者	Koutsodendris, A (通讯作者)
发表日期	2018
ISSN	0094-8276
EISSN	1944-8007
起始页码	13020
结束页码	13030
卷号	45 期号:23
英文摘要	Paleohydrological data comprising pollen assemblages and leaf-wax hydrogen isotopes (dDwax) from paleolake sediments in the Qaidam Basin (China) provide evidence for a link between increased moisture availability on the Tibetan Plateau and global cooling during the Mid-Pleistocene Transition. Notably, they document the persistence of humid and cold conditions during Marine Isotope Stages 24-22 (936-866 ka) suggesting that boundary conditions favorable for extended glaciation on the Tibetan Plateau first developed at similar to 900 ka. Our dDwax results indicate a strong influence of proximal (monsoonal) moisture sources during that glacial, in agreement with the intensification of the interhemispheric moisture transport resulting from Antarctic ice volume increase at similar to 900 ka. The consistency of our results with other marine and terrestrial climate data sets suggests that extended glaciation on the Tibetan Plateau may have initiated similar to 500 ka earlier than previously assumed, implying that midlatitude ice sheets actively contributed to global cooling during the Mid-Pleistocene Transition. Plain Language Summary The Mid-Pleistocene Transition (MPT) marks an intensification of global cooling associated with an expansion of Earth's ice sheets. The Tibetan Plateau-today the most extensively glaciated region outside the high latitudes-may have played a pivotal role in this process. However, because its glaciation history is yet poorly constrained, testing this hypothesis has remained difficult. Here we assess the climatic boundary conditions for glacier development on the Tibetan Plateau during the MPT using pollen and organic biomarker data from paleolake sediments (Qaidam Basin, China). Our results suggest a link between increased moisture availability on the Tibetan Plateau and global cooling during Marine Isotope Stages 24-22. We infer that favorable conditions for extended glaciation on the Tibetan Plateau first developed at similar to 900 ka, that is, similar to 500 ka earlier than previously assumed, suggesting that ice sheet formation on the Tibetan Plateau indeed played an active role in global cooling during the MPT.
关键词	WESTERN QAIDAM BASIN RESOLUTION POLLEN RECORD DRILL CORE SG-1 CLIMATE-CHANGE ANTARCTIC CLIMATE HYDROGEN ISOTOPES LAKE ELGYGYTGYN CENTRAL-ASIA ICE VOLUME PLEISTOCENE
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000454296600042
来源期刊	GEOPHYSICAL RESEARCH LETTERS
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/259295
推荐引用方式 GB/T 7714	Koutsodendris, Andreas,Sachse, Dirk,Appel, Erwin,et al. Prolonged Monsoonal Moisture Availability Preconditioned Glaciation of the Tibetan Plateau During the Mid-Pleistocene Transition[J]. 中国科学院青藏高原研究所,2018,45(23).
APA	Koutsodendris, Andreas.,Sachse, Dirk.,Appel, Erwin.,Herb, Christian.,Fischer, Tobias.,...&Pross, Joerg.(2018).Prolonged Monsoonal Moisture Availability Preconditioned Glaciation of the Tibetan Plateau During the Mid-Pleistocene Transition.GEOPHYSICAL RESEARCH LETTERS,45(23).
MLA	Koutsodendris, Andreas,et al."Prolonged Monsoonal Moisture Availability Preconditioned Glaciation of the Tibetan Plateau During the Mid-Pleistocene Transition".GEOPHYSICAL RESEARCH LETTERS 45.23(2018).