DOI: 10.5194/tc-11-619-2017
Scopus记录号: 2-s2.0-85013996337
论文题名: Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes
作者: Ruiz L ; , Berthier E ; , Viale M ; , Pitte P ; , Masiokas M ; H
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 1 起始页码: 619
结束页码: 634
语种: 英语
英文关键词: bedrock
; digital elevation model
; geodetic network
; glacial debris
; glacier mass balance
; glacier retreat
; ice field
; Shuttle Radar Topography Mission
; Andes
; Mount Tronador
; Patagonia
英文摘要: Glaciers in the northern Patagonian Andes (35-46°gS) have shown a dramatic decline in area in the last decades. However, little is known about glacier mass balance changes in this region. This study presents a geodetic mass balance estimate of Monte Tronador (41.15°gS; 71.88°gW) glaciers by comparing a Pléiades digital elevation model (DEM) acquired in 2012 with the Shuttle Radar Topography Mission (SRTM) X-band DEM acquired in 2000. We find a slightly negative Monte-Tronador-wide mass budget of g'0.17gw.e.gag'1 (ranging from g'0.54 to 0.14gw.e.gag'1 for individual glaciers) and a slightly negative trend in glacier extent (g'0.16g%gag'1) over the 2000-2012 period. With a few exceptions, debris-covered valley glaciers that descend below a bedrock cliff are losing mass at higher rates, while mountain glaciers with termini located above this cliff are closer to mass equilibrium. Climate variations over the last decades show a notable increase in warm season temperatures in the late 1970s but limited warming afterwards. These warmer conditions combined with an overall drying trend may explain the moderate ice mass loss observed at Monte Tronador. The almost balanced mass budget of mountain glaciers suggests that they are probably approaching a dynamic equilibrium with current (post-1977) climate, whereas the valley glaciers tongues will continue to retreat. The slightly negative overall mass budget of Monte Tronador glaciers contrasts with the highly negative mass balance estimates observed in the Patagonian ice fields further south. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75589
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: Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), Gobierno de Mendoza, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina; Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Centre National de la Recherche Scientifique (LEGOS - CNRS, UMR5566), Université de Toulouse, Toulouse, France
Recommended Citation:
Ruiz L,, Berthier E,, Viale M,et al. Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes[J]. Cryosphere,2017-01-01,11(1)