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An optimized method to calculate the geodetic mass balance of mountain glaciers
Indexado
WoS WOS:000454427700006
Scopus SCOPUS_ID:85057062102
DOI 10.1017/JOG.2018.79
Año 2018
Tipo artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras


Abstract



Understanding the effects of climate on glaciers requires precise estimates of ice volume change over several decades. This is achieved by the geodetic mass balance computed by two means: (1) the digital elevation model (DEM) comparison (SeqDEM) allows measurements over the entire glacier, however the low contrast over glacierized areas is an issue for the DEM generation through the photogrammetric techniques and (2) the profiling method (SePM) is a faster alternative but fails to capture the spatial variability of elevation changes. We present a new framework (SSD) that relies upon the spatial variability of the elevation change to densify a sampling network to optimize the surface-elevation change quantification. Our method was tested in two small glaciers over different periods. We conclude that the SePM overestimates the elevation change by similar to 20% with a mean difference of similar to 1.00 m (root mean square error (RMSE) = similar to 3.00 m) compared with results from the SeqDEM method. A variogram analysis of the elevation changes showed a mean difference of <0.10 m (RMSE = similar to 2.40 m) with SSD approach. A final assessment on the largest glacier in the French Alps confirms the high potential of our method to compute the geodetic mass balance, without going through the generation of a full-density DEM, but with a similar accuracy than the SeqDEM approach.

Revista



Revista ISSN
Journal Of Glaciology 0022-1430

Métricas Externas



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Disciplinas de Investigación



WOS
Geosciences, Multidisciplinary
Geography, Physical
Scopus
Earth Surface Processes
SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 Basantes-Serrano, Ruben Hombre Centro de Estudios Científicos - Chile
2 Rabatel, A. Hombre Univ Grenoble Alpes - Francia
Universite Grenoble Alpes - Francia
3 Vincent, C. Hombre Univ Grenoble Alpes - Francia
Universite Grenoble Alpes - Francia
4 Sirguey, Pascal Hombre UNIV OTAGO - Nueva Zelanda
University of Otago - Nueva Zelanda

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Financiamiento



Fuente
University of Otago
Centro de Estudios Cientificos (CECs) - Centers of Excellence Base Financing Program of the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT-Chile)
University Grenoble-Alpes (UGA)
CNES/SPOT-Image ISIS program
Grenoble Institute of Technology (Grenoble-INP)
LabExOSUG@2020

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Agradecimientos



Agradecimiento
Ruben Basantes acknowledges the support of the Centro de Estudios Cientificos (CECs) funded by the Centers of Excellence Base Financing Program of the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT-Chile). This study was conducted in the framework of the Service National d'Observation GLACIOCLIM (http://glacioclim.osug.fr/) and the Laboratoire Mixte International GREAT-ICE (http://www.great-ice.ird.fr/) with the support of the LabExOSUG@2020 (Investissements d'avenir - ANR10 LABX56). The authors are grateful to the CNES/SPOT-Image ISIS program contract #2011-513 for providing the SPOT images and SPOTDEM from 2003 to 2011. Pascal Sirguey acknowledges the University of Otago, the Grenoble Institute of Technology (Grenoble-INP) and the University Grenoble-Alpes (UGA) for supporting his contribution to this work while on research and study leave in Grenoble.

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