globalchange  > 气候变化与战略
DOI: 10.1073/pnas.0610109104
论文题名:
Dominant factors controlling glacial and interglacial variations in the treeline elevation in tropical Africa
作者: Wu H.; Guiot J.; Brewer S.; Guo Z.; Peng C.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2007
卷: 104, 期:23
起始页码: 9720
结束页码: 9724
语种: 英语
英文关键词: Biome model ; Biome pollen scores ; Palaeoclimatology ; Pollen ; Vegetation model inversion
Scopus关键词: carbon dioxide ; Africa ; altitude ; article ; climate change ; environmental temperature ; glacier ; Holocene ; model ; paleoclimatology ; pollen ; precipitation ; priority journal ; sea surface temperature ; tree ; vegetation history ; Africa ; Altitude ; Atmosphere ; Carbon Dioxide ; Climate ; Models, Theoretical ; Pollen ; Precipitation ; Temperature ; Trees ; Tropical Climate
英文摘要: The knowledge of tropical palaeoclimates is crucial for understanding global climate change, because it is a test bench for general circulation models that are ultimately used to predict future global warming. A longstanding issue concerning the last glacial maximum in the tropics is the discrepancy between the decrease in sea-surface temperatures reconstructed from marine proxies and the high-elevation decrease in land temperatures estimated from indicators of treeline elevation. In this study, an improved inverse vegetation modeling approach is used to quantitatively reconstruct palaeoclimate and to estimate the effects of different factors (temperature, precipitation, and atmospheric CO2 concentration) on changes in treeline elevation based on a set of pollen data covering an altitudinal range from 100 to 3,140 m above sea level in Africa. We show that lowering of the African treeline during the last glacial maximum was primarily triggered by regional drying, especially at upper elevations, and was amplified by decreases in atmospheric CO2 concentration and perhaps temperature. This contrasts with scenarios for the Holocene and future climates, in which the increase in treeline elevation will be dominated by temperature. Our results suggest that previous temperature changes inferred from tropical treeline shifts may have been overestimated for low-CO2 glacial periods, because the limiting factors that control changes in treeline elevation differ between glacial and interglacial periods. © 2007 by The National Academy of Sciences of the USA.
Citation statistics:
被引频次[WOS]:55   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162469
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Wu, H., State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China, Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Unité Mixte de Recherche 6635, Centre National de la Recherche Scientifique/Université Paul Cézanne, BP 80, 13545 Aix-en-Provence Cedex 4, France, Institut des Sciences de l'Environnement, Département des Sciences Biologiques, Université du Québec À Montreal, Montréal, Que. H3C 3P8, Canada; Guiot, J., Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Unité Mixte de Recherche 6635, Centre National de la Recherche Scientifique/Université Paul Cézanne, BP 80, 13545 Aix-en-Provence Cedex 4, France; Brewer, S., Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, Unité Mixte de Recherche 6635, Centre National de la Recherche Scientifique/Université Paul Cézanne, BP 80, 13545 Aix-en-Provence Cedex 4, France; Guo, Z., State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China; Peng, C., Institut des Sciences de l'Environnement, Département des Sciences Biologiques, Université du Québec À Montreal, Montréal, Que. H3C 3P8, Canada

Recommended Citation:
Wu H.,Guiot J.,Brewer S.,et al. Dominant factors controlling glacial and interglacial variations in the treeline elevation in tropical Africa[J]. Proceedings of the National Academy of Sciences of the United States of America,2007-01-01,104(23)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Wu H.]'s Articles
[Guiot J.]'s Articles
[Brewer S.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Wu H.]'s Articles
[Guiot J.]'s Articles
[Brewer S.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Wu H.]‘s Articles
[Guiot J.]‘s Articles
[Brewer S.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.