DOI: 10.5194/tc-10-681-2016
Scopus记录号: 2-s2.0-84962541905
论文题名: Thinning of the Monte Perdido Glacier in the Spanish Pyrenees since 1981
作者: López-Moreno J ; I ; , Revuelto J ; , Rico I ; , Chueca-Cía J ; , Julián A ; , Serreta A ; , Serrano E ; , Vicente-Serrano S ; M ; , Azorin-Molina C ; , Alonso-González E ; , García-Ruiz J ; M
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 2 起始页码: 681
结束页码: 694
语种: 英语
英文关键词: aerial photograph
; digital elevation model
; environmental degradation
; feedback mechanism
; geodetic datum
; glacier dynamics
; glacier mass balance
; laser method
; lidar
; topographic mapping
; Pyrenees
; Spain
英文摘要: This paper analyzes the evolution of the Monte Perdido Glacier, the third largest glacier in the Pyrenees, from 1981 to the present. We assessed the evolution of the glacier's surface area by analysis of aerial photographs from 1981, 1999, and 2006, and changes in ice volume by geodetic methods with digital elevation models (DEMs) generated from topographic maps (1981 and 1999), airborne lidar (2010) and terrestrial laser scanning (TLS, 2011, 2012, 2013, and 2014) data. We interpreted the changes in the glacier based on climate data from nearby meteorological stations. The results indicate that the degradation of this glacier accelerated after 1999. The rate of ice surface loss was almost three times greater during 1999-2006 than during earlier periods. Moreover, the rate of glacier thinning was 1.85 times faster during 1999-2010 (rate of surface elevation change = -8.98 ± 1.80 m, glacier-wide mass balance = -0.73 ± 0.14 m w.e. yr-1) than during 1981-1999 (rate of surface elevation change = -8.35 ± 2.12 m, glacier-wide mass balance = -0.42 ± 0.10 m w.e. yr-1). From 2011 to 2014, ice thinning continued at a slower rate (rate of surface elevation change = -1.93 ± 0.4 m yr-1, glacier-wide mass balance = -0.58 ± 0.36 m w.e. yr-1). This deceleration in ice thinning compared to the previous 17 years can be attributed, at least in part, to two consecutive anomalously wet winters and cool summers (2012-2013 and 2013-2014), counteracted to some degree by the intense thinning that occurred during the dry and warm 2011-2012 period. However, local climatic changes observed during the study period do not seem sufficient to explain the acceleration of ice thinning of this glacier, because precipitation and air temperature did not exhibit statistically significant trends during the study period. Rather, the accelerated degradation of this glacier in recent years can be explained by a strong disequilibrium between the glacier and the current climate, and likely by other factors affecting the energy balance (e.g., increased albedo in spring) and feedback mechanisms (e.g., heat emitted from recently exposed bedrock and debris covered areas). © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75166
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: Dept. of Geoenvironmental Processes and Global Change, Pyrenean Institute of Ecology, CSIC, Campus de Aula Dei, P.O. Box 13.034, Zaragoza, Spain; Dept. of Geography, University of the Basque Country, Prehistory and Archeology, Vitoria, Spain; Dept. of Geography, University of Zaragoza, Zaragoza, Spain; Dept. of Graphic Design and Engineering, University of Zaragoza, Huesca, Spain; Dept. of Geography, University of Valladolid, Valladolid, Spain
Recommended Citation:
López-Moreno J,I,, Revuelto J,et al. Thinning of the Monte Perdido Glacier in the Spanish Pyrenees since 1981[J]. Cryosphere,2016-01-01,10(2)