气候变化领域集成服务门户(CCPortal): A preliminary reconstruction of the paleoecological and paleoclimatic history of the Chinese Loess Plateau from the application of biomarkers

CCPortal

DOI	10.1016/j.palaeo.2008.10.006
	A preliminary reconstruction of the paleoecological and paleoclimatic history of the Chinese Loess Plateau from the application of biomarkers
	Bai, Yan; Fang, Xiaomin; Nie, Junsheng; Wang, Yongli; Wu, Fuli
通讯作者	Fang, XM (通讯作者)
发表日期	2009
ISSN	0031-0182
EISSN	1872-616X
起始页码	161
结束页码	169
卷号	271 期号:1-2
英文摘要	This study provides a preliminary reconstruction of paleoecological and paleoclimatic history over the central Chinese Loess Plateau (CLP) during the last 8.1 Ma based on biomarker records from the earliest of the Chaona stratigraphic section. Throughout the section, we found variations in n-alkane and n-alkan-2-one distributions and dramatic changes in six other biomarker proxies: 1) n-alkanes (C-27 + C-29)/(C-31 + C-33) ratios, 2) n-alkanes C-27/C-31 ratios, 3) CPI (carbon preference index) values for CPI((H))ALK, 4) values for CPI(H)KET, 5) n-alkane mean chain lengths ACL-ALK, and 6) n-alkan-2-ones C-29/C-31 ratios. The C-29 n-alkanes dominate the red clay sediments with little variability, indicating that trees dominated the CLP and that the climate was relatively stable and less variable during the 8.1-2.6 Ma period. In contrast, the C-31 n-alkanes dominate the loess-paleosol sediments, and biomarkers vary with relatively greater amplitude and higher frequency, indicating that grasses dominated the CLP and the climate was more and and variable. These biomarker records chronicle a drying and cooling trend on the CLP since 4 Ma. These records can be further divided into four stages with boundaries around 5.6, 3.8 and 2.6 Ma, indicating that the CLP vegetation and climate experienced four evolutionary phases, broadly consistent with those inferred from other available proxy data. (C) 2008 Elsevier B.V. All rights reserved.
关键词	RED CLAY DEPOSITS LATE MIOCENE MAGNETIC-SUSCEPTIBILITY MONSOON EVOLUTION TIBETAN PLATEAU ORGANIC-MATTER POLLEN RECORD PLIOCENE LAKE SEQUENCE
英文关键词	Loess-paleosol sequences; Red-clay; Biomarker; Chinese Loess Plateau; Asian drying
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:000262801000015
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/257706
推荐引用方式 GB/T 7714	Bai, Yan,Fang, Xiaomin,Nie, Junsheng,et al. A preliminary reconstruction of the paleoecological and paleoclimatic history of the Chinese Loess Plateau from the application of biomarkers[J]. 中国科学院青藏高原研究所,2009,271(1-2).
APA	Bai, Yan,Fang, Xiaomin,Nie, Junsheng,Wang, Yongli,&Wu, Fuli.(2009).A preliminary reconstruction of the paleoecological and paleoclimatic history of the Chinese Loess Plateau from the application of biomarkers.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,271(1-2).
MLA	Bai, Yan,et al."A preliminary reconstruction of the paleoecological and paleoclimatic history of the Chinese Loess Plateau from the application of biomarkers".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 271.1-2(2009).