气候变化领域集成服务门户(CCPortal): Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene

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DOI	10.1016/j.palaeo.2019.109504
	Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene
	Cao, Mengmeng; Sun, Jimin; Liu, Weiguo; Hou, Juzhi; Tian, Qian; Sun, Zhe
通讯作者	Sun, JM (通讯作者)
发表日期	2020
ISSN	0031-0182
EISSN	1872-616X
卷号	539
英文摘要	Climatic variations and their forcing mechanisms in Tibet are highly significant for understanding the environmental effects of the Tibetan Plateau through its controlling on atmospheric circulation. Here we present new leaf wax n-alkanes from Cenozoic lacustrine sediments in the Lunpola Basin of central Tibet to constrain long-term paleoclimatic changes. Our results suggest that the paleoclimate from the late Oligocene to early Miocene was generally stable, but tending slightly towards cold-dry from 25.5 to 23.2 Ma, followed by a trend towards warm-humid between 23.2 and 21.7 Ma, and finally by a more arid and highly oscillating climate after 21.7 Ma. Our results compare favorably with the proxies of marine delta O-18 records, which suggests that the general long-term trend since the late Oligocene has been a response to global temperature variations. Moreover, spectral analysis of delta C-13(31) and delta H-2(31) data reveals that relative humidity exhibits similar to 400 kyr cycles, controlled mainly by periodic changes in global ice volumes.
关键词	HYDROGEN-ISOTOPIC COMPOSITION EOCENE PALYNOLOGICAL RECORD ANTARCTIC ICE-SHEET ATMOSPHERIC CO2 LUNPOLA BASIN DELTA-D ORGANIC GEOCHEMISTRY TERRESTRIAL PLANTS AFRICAN HYDROLOGY VEGETATION CHANGE
英文关键词	Isotopes; Redness; Lunpola Basin; Cenozoic; Paleoclimate; Spectral analysis
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000508745600008
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
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/259980
推荐引用方式 GB/T 7714	Cao, Mengmeng,Sun, Jimin,Liu, Weiguo,et al. Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene[J]. 中国科学院青藏高原研究所,2020,539.
APA	Cao, Mengmeng,Sun, Jimin,Liu, Weiguo,Hou, Juzhi,Tian, Qian,&Sun, Zhe.(2020).Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,539.
MLA	Cao, Mengmeng,et al."Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 539(2020).