Dominant factors controlling glacial and interglacial variations in the treeline elevation in tropical Africa
文献类型：期刊论文
| 作者 | Wu, Haibin; Guiot, Joel; Brewer, Simon; Guo, Zhengtang; Peng, Changhui |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2007-06-05 |
| 卷号 | 104期号:23页码:9720-9724 |
| 关键词 | biome model biome pollen scores palaeoclimatology pollen vegetation model inversion |
| ISSN号 | 0027-8424 |
| DOI | 10.1073/pnas.0610109104 |
| 文献子类 | Article |
| 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. |
| WOS关键词 | PLANT-CLIMATE INTERACTIONS ; SEA-SURFACE TEMPERATURES ; LOW ATMOSPHERIC CO2 ; PHYSIOLOGICAL SIGNIFICANCE ; VEGETATION ; MAXIMUM ; RECONSTRUCTION ; PALEOCLIMATE ; ECOSYSTEMS ; PALEODATA |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000247114100033 |
| 出版者 | NATL ACAD SCIENCES |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68500]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wu, Haibin |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loes & Quaternary Geol, Xian 710075, Peoples R China 2.Univ Paul Cezanne, CNRS, UMR 66335, Ctr Europeen Rech & Enseignement Geosci Environm, F-13545 Aix En Provence 4, France 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Univ Quebec, Dept Sci Biol, Inst Environm Sci, Montreal, PQ H3C 3P8, Canada |
| 推荐引用方式 GB/T 7714 | Wu, Haibin,Guiot, Joel,Brewer, Simon,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,2007,104(23):9720-9724. |
| APA | Wu, Haibin,Guiot, Joel,Brewer, Simon,Guo, Zhengtang,&Peng, Changhui.(2007).Dominant factors controlling glacial and interglacial variations in the treeline elevation in tropical Africa.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,104(23),9720-9724. |
| MLA | Wu, Haibin,et al."Dominant factors controlling glacial and interglacial variations in the treeline elevation in tropical Africa".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 104.23(2007):9720-9724. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。