Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/jqs.1424 |
Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3 | |
Bromley, Gordon R. M.1; Hall, Brenda L.1; Schaefer, Joerg M.2; Winckler, Gisela2; Todd, Claire E.3; Rademaker, Kurt M.1 | |
通讯作者 | Bromley, Gordon R. M. |
来源期刊 | JOURNAL OF QUATERNARY SCIENCE
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ISSN | 0267-8179 |
EISSN | 1099-1417 |
出版年 | 2011 |
卷号 | 26期号:1页码:37-43 |
英文摘要 | The occurrence of pronounced climate reversals during the last glacial termination has long been recognised in palaeoclimate records from both hemispheres and from high to low latitudes. Accurate constraint of both the timing and magnitude of events, such as the Younger Dryas and Antarctic Cold Reversal, is vital in order to test different hypotheses for the causes and propagation of abrupt climate change. However, in contrast to higher-latitude regions, well-dated records from the Tropics are rare and the structure of late-glacial tropical climate remains uncertain. As a step toward addressing this problem, we present an in situ cosmogenic He-3 surface exposure chronology from Nevado Coropuna, southern Peru, documenting a significant fluctuation of the ice margin during the late-glacial period. Ten tightly clustered ages from a pair of moraines located halfway between the modern glacier and the Last Glacial Maximum terminus range from 11.9 to 13.9 ka and give an arithmetic mean age of 12.8 +/- 0.7 ka (1 sigma). These data constitute direct evidence for a readvance, or prolonged stillstand, of glaciers in the arid Andes of southwestern Peru. Copyright (C) 2011 John Wiley & Sons, Ltd. |
英文关键词 | late-glacial reversal last termination Tropics cosmogenic helium-3 glaciers |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000287124100006 |
WOS关键词 | ANTARCTIC COLD REVERSAL ; SURFACE EXPOSURE AGES ; YOUNGER DRYAS ; CORDILLERA BLANCA ; ICE-CORE ; PRODUCTION-RATES ; CLIMATE ; BE-10 ; MORAINES ; RADIOCARBON |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/169402 |
作者单位 | 1.Univ Maine, Dept Earth Sci, Climate Change Inst, Edward T Bryand Global Sci Ctr, Orono, ME 04469 USA; 2.Columbia Univ, Lamont Doherty Earth Observ, Dept Earth & Environm Sci, Palisades, NY USA; 3.Pacific Lutheran Univ, Dept Geol Sci, Rieke Sci Ctr, Tacoma, WA 98447 USA |
推荐引用方式 GB/T 7714 | Bromley, Gordon R. M.,Hall, Brenda L.,Schaefer, Joerg M.,et al. Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3[J],2011,26(1):37-43. |
APA | Bromley, Gordon R. M.,Hall, Brenda L.,Schaefer, Joerg M.,Winckler, Gisela,Todd, Claire E.,&Rademaker, Kurt M..(2011).Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3.JOURNAL OF QUATERNARY SCIENCE,26(1),37-43. |
MLA | Bromley, Gordon R. M.,et al."Glacier fluctuations in the southern Peruvian Andes during the late-glacial period, constrained with cosmogenic He-3".JOURNAL OF QUATERNARY SCIENCE 26.1(2011):37-43. |
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