Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.epsl.2012.12.017 |
A 130 ka reconstruction of rainfall on the Bolivian Altiplano | |
Placzek, C. J.1,2; Quade, J.3; Patchett, P. J.3 | |
通讯作者 | Placzek, C. J. |
来源期刊 | EARTH AND PLANETARY SCIENCE LETTERS
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ISSN | 0012-821X |
EISSN | 1385-013X |
出版年 | 2013 |
卷号 | 363页码:97-108 |
英文摘要 | New efforts to link climate reconstructions from shoreline deposits and sediment cores yield an improved and more detailed lake history from the Bolivian Altiplano. On the Southern Altiplano, 10 lake oscillations have been identified from this new unified chronology, each coincident with North Atlantic cold events such as Heinrich Events H5, H2, H1, and the Younger Dryas. By coupling this new lake history to a hydrologic budget model we are able to evaluate precipitation variability on the Southern Bolivian Altiplano over the last 130 ka. These modeling efforts underscore the relative aridity of the Altiplano during the rare and small lake cycles occurring between 80 and 20 ka, when colder temperatures combined with little or no change in rainfall produced smaller paleolakes. Relative aridity between 80 and 20 ka contrasts with the immense Tauca lake cycle (18.1-14.1 ka), which was six times larger than modern Lake Titicaca and coincided with Heinrich Event I. This improved paleolake record from the Southern Altiplano reveals a strong link between central Andean climate and Atlantic sea-surface temperature gradients during the late Pleistocene, even though today rainfall variability is driven mostly by Pacific sea-surface temperature anomalies associated with El Nino/Southern Oscillation. However, not all Heinrich Events appear to result in lake expansions, most conspicuously during the global cold interval between 80 and 20 ka when the Altiplano and Amazon Basin were relatively arid. (C) 2012 Elsevier B.V. All rights reserved. |
英文关键词 | North Atlantic Heinrich events uranium-thorium Bolivia intertropical convergence zone paleolake |
类型 | Article |
语种 | 英语 |
国家 | Australia ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000316643300011 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; INTERTROPICAL CONVERGENCE ZONE ; LATE QUATERNARY VEGETATION ; TROPICAL SOUTH-AMERICA ; ATMOSPHERIC CIRCULATION ; LATE PLEISTOCENE ; LAKE TITICACA ; CENTRAL ANDES ; AMAZON BASIN ; EL-NINO |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
来源机构 | University of Arizona |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/176618 |
作者单位 | 1.James Cook Univ, Ctr Trop Environm & Sustainabil Sci, Townsville, Qld 4811, Australia; 2.James Cook Univ, Sch Earth & Environm Sci, Townsville, Qld 4811, Australia; 3.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA |
推荐引用方式 GB/T 7714 | Placzek, C. J.,Quade, J.,Patchett, P. J.. A 130 ka reconstruction of rainfall on the Bolivian Altiplano[J]. University of Arizona,2013,363:97-108. |
APA | Placzek, C. J.,Quade, J.,&Patchett, P. J..(2013).A 130 ka reconstruction of rainfall on the Bolivian Altiplano.EARTH AND PLANETARY SCIENCE LETTERS,363,97-108. |
MLA | Placzek, C. J.,et al."A 130 ka reconstruction of rainfall on the Bolivian Altiplano".EARTH AND PLANETARY SCIENCE LETTERS 363(2013):97-108. |
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