气候变化领域集成服务门户(CCPortal): Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes

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DOI	10.5194/tc-11-619-2017
	Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes
	Ruiz L.; Berthier E.; Viale M.; Pitte P.; Masiokas M.H.
发表日期	2017
ISSN	19940416
卷号	11 期号:1
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.
学科领域	bedrock; digital elevation model; geodetic network; glacial debris; glacier mass balance; glacier retreat; ice field; Shuttle Radar Topography Mission; Andes; Mount Tronador; Patagonia
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119431
作者单位	Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), Gobierno de Mendoza, Universidad Nacional de Cuyo, CONICET, Mendoza, 5500, Argentina; Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Centre National de la Recherche Scientifique (LEGOS - CNRS, UMR5566), Université de Toulouse, Toulouse, 31400, France
推荐引用方式 GB/T 7714	Ruiz L.,Berthier E.,Viale M.,et al. Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes[J],2017,11(1).
APA	Ruiz L.,Berthier E.,Viale M.,Pitte P.,&Masiokas M.H..(2017).Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes.Cryosphere,11(1).
MLA	Ruiz L.,et al."Recent geodetic mass balance of Monte Tronador glaciers, northern Patagonian Andes".Cryosphere 11.1(2017).