气候变化领域集成服务门户(CCPortal): Glacier topography and elevation changes derived from Pléiades sub-meter stereo images

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DOI	10.5194/tc-8-2275-2014
	Glacier topography and elevation changes derived from Pléiades sub-meter stereo images
	Berthier E.; Vincent C.; Magnússon E.; Gunnlaugsson Á.P.; Pitte P.; Le Meur E.; Masiokas M.; Ruiz L.; Pálsson F.; Belart J.M.C.; Wagnon P.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
英文摘要	In response to climate change, most glaciers are losing mass and hence contribute to sea-level rise. Repeated and accurate mapping of their surface topography is required to estimate their mass balance and to extrapolate/calibrate sparse field glaciological measurements. In this study we evaluate the potential of sub-meter stereo imagery from the recently launched Pléiades satellites to derive digital elevation models (DEMs) of glaciers and their elevation changes. Our five evaluation sites, where nearly simultaneous field measurements were collected, are located in Iceland, the European Alps, the central Andes, Nepal and Antarctica. For Iceland, the Pléiades DEM is also compared to a lidar DEM. The vertical biases of the Pléiades DEMs are less than 1m if ground control points (GCPs) are used, but reach up to 7m without GCPs. Even without GCPs, vertical biases can be reduced to a few decimetres by horizontal and vertical co-registration of the DEMs to reference altimetric data on ice-free terrain. Around these biases, the vertical precision of the Pléiades DEMs is ±1m and even ±0.5m on the flat glacier tongues (1σ confidence level). Similar precision levels are obtained in the accumulation areas of glaciers and in Antarctica. We also demonstrate the high potential of Pléiades DEMs for measuring seasonal, annual and multiannual elevation changes with an accuracy of 1m or better if cloud-free images are available. The negative region-wide mass balances of glaciers in the Mont-Blanc area (-1.04 ± 0.23ma-1 water equivalent, w.e.) are revealed by differencing Satellite pour l'Observation de la Terre 5 (SPOT 5) and Pléiades DEMs acquired in August 2003 and 2012, confirming the accelerated glacial wastage in the European Alps. © Author(s) 2014.
学科领域	accuracy assessment; cryosphere; digital elevation model; glacier mass balance; Pleiades; SPOT; stereo image; topographic mapping; Alps; Alps; Andes; Antarctica; Haute Savoie; Iceland; Mont Blanc; Nepal; Savoy Alps; Western Alps
语种	英语
scopus关键词	accuracy assessment; cryosphere; digital elevation model; glacier mass balance; Pleiades; SPOT; stereo image; topographic mapping; Alps; Alps; Andes; Antarctica; Haute Savoie; Iceland; Mont Blanc; Nepal; Savoy Alps; Western Alps
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/120000
作者单位	Laboratoire d'Etudes en Géophysique et Océanographie Spatiales, Centre National de la Recherche Scientifique (LEGOS - CNRS, UMR5566), Université de Toulouse, Toulouse, 31400, France; UJF - Grenoble1/CNRS, LGGE - UMR5183, Grenoble, 38041, France; Institute of Earth Sciences, University of Iceland, Askja, Sturlugata 7, Reykjavik, Iceland; Instituto Argentino de Nivología, Glaciología Y Ciencias Ambientales (IANIGLA), CCT - CONICET Mendoza, C.C. 330, Mendoza, 5500, Argentina; IRD/Univ. Grenoble Alpes/CNRS/INPG, Laboratoire D'étude des Transferts en Hydrologie et Environnement, LTHE - UMR5564, Laboratoire de Glaciologie et de Ǵophysique de L'Environnement, LGGE - UMR5183, Grenoble, 38041, France; ICIMOD, G.P.O. Box 3226, Kathmandu, Nepal
推荐引用方式 GB/T 7714	Berthier E.,Vincent C.,Magnússon E.,et al. Glacier topography and elevation changes derived from Pléiades sub-meter stereo images[J],2014,8(6).
APA	Berthier E..,Vincent C..,Magnússon E..,Gunnlaugsson Á.P..,Pitte P..,...&Wagnon P..(2014).Glacier topography and elevation changes derived from Pléiades sub-meter stereo images.Cryosphere,8(6).
MLA	Berthier E.,et al."Glacier topography and elevation changes derived from Pléiades sub-meter stereo images".Cryosphere 8.6(2014).