Holocene land-cover changes on the Tibetan Plateau

doi:10.1177/0959683609348882

CORC > 北京大学 > 城市与环境学院

	Holocene land-cover changes on the Tibetan Plateau
	Herzschuh, Ulrike ; Birks, H. John B. ; Ni, Jian ; Zhao, Yan ; Liu, Hongyan ; Liu, Xingqi ; Grosse, Guido
刊名	holocene
	2010
关键词	Tibetan Plateau Holocene pollen leaf area index land-surface parameter compositional turnover rate-of-change analysis transfer function LEAF-AREA INDEX EASTERN NORTH-AMERICA LAST GLACIAL MAXIMUM LARGE-SCALE OROGRAPHY POLLEN DATA CLIMATE-CHANGE QINGHAI LAKE GLOBAL HYDROCLIMATE SURFACE PROCESSES YUNNAN PROVINCE
DOI	10.1177/0959683609348882
英文摘要	Information on changes in land-surface features on the Tibetan Plateau (TP) during the Holocene may help our understanding of the forcing of monsoonal circulation. We analyse vegetation changes during the last 9000 years from pollen records of four lakes (Hurleg Lake in the Qaidam Basin; Qinghai Lake on the northeastern TP; Zigetang Lake on the central TP and Koucha Lake on the eastern TP) which represent different regions and vegetation types on the Plateau today. A set of modern pollen assemblages from 111 lake sediment samples originating from different vegetation types is used for the interpretation of the Holocene pollen records. Four types of numerical analyses are used to infer different aspects of pollen-stratigraphical and inferred vegetation changes: biome reconstruction; ordination (to infer palynological compositional turnover); rate-of-assemblage-change analysis, and a pollen-LAI (leaf area index) transfer function. Our results show strong regional differences in inferred vegetation change in terms of timing, strength and the nature of change. The greatest changes in compositional turnover and LAI are found in the Qinghai Lake record, indicating that forests were replaced by steppe vegetation in a step-wise fashion since the mid Holocene. Alpine steppe vegetation on the central and eastern TP was relatively stable throughout the Holocene, only showing a gradual replacement of temperate steppe by high-alpine meadows. The Qaidam Basin was dominated by temperate desert throughout the Holocene. The documented palynological and inferred vegetation changes can be most parsimoniously explained by climate change, although human impacts cannot be excluded as a contributing factor. Comparison of our findings with sensitivity analyses of numerical climate simulations suggests that long-term vegetation change may have had only a weak influence on regional climate change on the Tibetan Plateau.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000274051200010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geography, Physical; Geosciences, Multidisciplinary; SCI(E); 24; ARTICLE; 1; 91-104; 20
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/401308]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Herzschuh, Ulrike,Birks, H. John B.,Ni, Jian,et al. Holocene land-cover changes on the Tibetan Plateau[J]. holocene,2010.
APA	Herzschuh, Ulrike.,Birks, H. John B..,Ni, Jian.,Zhao, Yan.,Liu, Hongyan.,...&Grosse, Guido.(2010).Holocene land-cover changes on the Tibetan Plateau.holocene.
MLA	Herzschuh, Ulrike,et al."Holocene land-cover changes on the Tibetan Plateau".holocene (2010).