Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.epsl.2017.12.027 |
Middle-to-late Holocene palaeoenvironmental reconstruction from the A294 ice-cave record (Central Pyrenees, northern Spain) | |
Sancho, Carlos1; Belmonte, Anchel1; Bartolome, Miguel1,2; Moreno, Ana2; Leunda, Maria2; Lopez-Martinez, Jeronimo3 | |
通讯作者 | Sancho, Carlos |
来源期刊 | EARTH AND PLANETARY SCIENCE LETTERS
![]() |
ISSN | 0012-821X |
EISSN | 1385-013X |
出版年 | 2018 |
卷号 | 484页码:135-144 |
英文摘要 | Perennial ice deposits in caves represent unique, but underexplored, terrestrial sequences that potentially contain outstanding palaeoclimatic records. Here, we present a pioneer palaeoenvironmental study of an ice deposit preserved in a small sag-type cave (A294) in the Central Pyrenees (northern Iberian Peninsula). The 9.25-m-thick sequence, which is dated from 6100 +/- 107 to 1888 +/- 64 cal BP, represents the oldest known firn ice record worldwide. The stratigraphy (detrital layers, unconformities, and cross stratification), plant macrofossils, and isotopic signature (similarity between the ice linear distribution, delta H-2 = 7.83 delta O-18 + 8.4, and the Global Meteoric Water Line) of the ice point to the diagenesis of snow introduced to the cave by winter snowstorms. Four phases of rapid ice accumulation (6100-5515, 4945-4250, 3810-3155, and 2450-1890 cal BP) are related to wetter and colder winters. Comparison of the isotopic composition (delta O-18 and deuterium excess) of the ice with other paleoclimate records show that both source effects and the North Atlantic Oscillation (NAO) mechanism exert a dominant influence on the ice cave record. The NAO signal may be a combination of source effects and rainfall amount. Three intervals with low ice accumulation occurred between the phases of rapid accumulation and were related to drier, and possibly warmer, winters. These centennial-scale episodes appear to be in-phase with regional arid events, as established from high altitude lacustrine records and can be correlated to global Rapid Climate Change events. The current warming trend has dramatically decreased the volume of the ice deposit in cave A294. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | firn ice cave radiocarbon dating isotopic composition Holocene climate Central Pyrenees |
类型 | Article |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000424726000012 |
WOS关键词 | CLIMATE VARIABILITY ; ATLANTIC OSCILLATION ; MEDITERRANEAN REGION ; SOUTHERN PYRENEES ; EASTERN SPAIN ; MOUNTAINS ; PRECIPITATION ; DYNAMICS ; AUSTRIA ; 1ST |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208594 |
作者单位 | 1.Univ Zaragoza, Pedro Cerbuna 12, E-50009 Zaragoza, Spain; 2.CSIC, Inst Pirenaico Ecol, Avda Montanana 1005, Zaragoza 50059, Spain; 3.Univ Autonoma Madrid, Fac Ciencias, E-28049 Madrid, Spain |
推荐引用方式 GB/T 7714 | Sancho, Carlos,Belmonte, Anchel,Bartolome, Miguel,et al. Middle-to-late Holocene palaeoenvironmental reconstruction from the A294 ice-cave record (Central Pyrenees, northern Spain)[J],2018,484:135-144. |
APA | Sancho, Carlos,Belmonte, Anchel,Bartolome, Miguel,Moreno, Ana,Leunda, Maria,&Lopez-Martinez, Jeronimo.(2018).Middle-to-late Holocene palaeoenvironmental reconstruction from the A294 ice-cave record (Central Pyrenees, northern Spain).EARTH AND PLANETARY SCIENCE LETTERS,484,135-144. |
MLA | Sancho, Carlos,et al."Middle-to-late Holocene palaeoenvironmental reconstruction from the A294 ice-cave record (Central Pyrenees, northern Spain)".EARTH AND PLANETARY SCIENCE LETTERS 484(2018):135-144. |
条目包含的文件 | 条目无相关文件。 |
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。