DOI: 10.5194/tc-7-1635-2013
Scopus记录号: 2-s2.0-84887303396
论文题名: Net accumulation rates derived from ice core stable isotope records of Pío XI glacier, Southern Patagonia Icefield
作者: Schwikowski M ; , Schläppi M ; , Santibañez P ; , Rivera A ; , Casassa G
刊名: Cryosphere
ISSN: 19940416
出版年: 2013
卷: 7, 期: 5 起始页码: 1635
结束页码: 1644
语种: 英语
英文关键词: accumulation rate
; air temperature
; climate effect
; geoaccumulation
; glacier dynamics
; glacier mass balance
; ice core
; proxy climate record
; stable isotope
; warming
; Chile
; Magallanes
; Patagonia
; Pio XI Glacier
英文摘要: Pío XI, the largest glacier of the Southern Patagonia Icefield, reached its neoglacial maximum extent in 1994 and is one of the few glaciers in that area which is not retreating. In view of the recent warming it is important to understand glacier responses to climate changes. Due to its remoteness and the harsh conditions in Patagonia, no systematic mass balance studies have been performed. In this study we derived net accumulation rates for the period 2000-2006 from a 50 m (33.2 4 m weq) ice core collected in the accumulation area of Pío XI (2600 m a.s.l., 49 16'40"S, 73 21'14"W). Borehole temperatures indicate near temperate ice, but the average melt percent is only 16 ± 14%. Records of stable isotopes are well preserved and were used for identification of annual layers. Net accumulation rates range from 3.4-7.1 water equivalent (m weq) with an average of 5.8 m weq, comparable to precipitation amounts at the Chilean coast, but not as high as expected for the Icefield. Ice core stable isotope data correlate well with upper air temperatures and may be used as temperature proxy. © 2013 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74930
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Paul Scherrer Institut (PSI), Villigen, Switzerland; Department for Chemistry and Biochemistry, University of Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Switzerland; Centro de Estudios Científicos (CECS), Valdivia, Chile; Departamento de Geografía, Universidad de Chile, Santiago, Chile
Recommended Citation:
Schwikowski M,, Schläppi M,, Santibañez P,et al. Net accumulation rates derived from ice core stable isotope records of Pío XI glacier, Southern Patagonia Icefield[J]. Cryosphere,2013-01-01,7(5)