Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)

We report on ice movements changes in the Horcones Inferior Glacier (HIG), a major debris-covered glacier located in the southern sector of Mt. Aconcagua, Central Andes of Argentina. The HIG has been characterized by outstanding surge phenomena in the recent past, with the last episode registered in...

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Autores principales:	Lenzano,M. Gabriela, Lenzano,Luis, Barón,Jorge, Lannutti,Esteban, Durand,Marcelo, Trombotto Liaudat,Dario
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2016
Materias:	GNSS Debris-covered glacier Change detection Mt. Aconcagua
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000100003
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spelling	oai:scielo:S0718-710620160001000032016-07-29Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)Lenzano,M. GabrielaLenzano,LuisBarón,JorgeLannutti,EstebanDurand,MarceloTrombotto Liaudat,Dario GNSS Debris-covered glacier Change detection Mt. Aconcagua We report on ice movements changes in the Horcones Inferior Glacier (HIG), a major debris-covered glacier located in the southern sector of Mt. Aconcagua, Central Andes of Argentina. The HIG has been characterized by outstanding surge phenomena in the recent past, with the last episode registered in 2003. After a surge episode, the surface becomes highly unstable, with continuous ice degradation. We studied the response of the glacier surface in the post-surge stagnation period, based on six semi-continuous Global Navigation Satellite System (GNSS) stations distributed along the main axis of the glacier. Kinematic GNSS profiles were acquired over the surface, aiming to strengthen the GNSS measurements of elevation change. Our results show a horizontal surface displacement from 0.4 cmd-1 to 2.7 cmd-1, and a 0.8 cmd-1 mean elevation reduction during the 2009-2014 period. GNSS profiles also show a velocity increase, ranging from -1.1 cmd-1 in 2012 to -1.8 cmd-1 in 2013. Changing surface velocities in the HIG may be related to the presence of a thick debris cover, in combination with faster glacier degradation due to thickness loss after the 2003 surge, and glacier-climate interaction.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.43 n.1 20162016-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000100003en10.5027/andgeoV43n1-a03
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	GNSS Debris-covered glacier Change detection Mt. Aconcagua
spellingShingle	GNSS Debris-covered glacier Change detection Mt. Aconcagua Lenzano,M. Gabriela Lenzano,Luis Barón,Jorge Lannutti,Esteban Durand,Marcelo Trombotto Liaudat,Dario Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
description	We report on ice movements changes in the Horcones Inferior Glacier (HIG), a major debris-covered glacier located in the southern sector of Mt. Aconcagua, Central Andes of Argentina. The HIG has been characterized by outstanding surge phenomena in the recent past, with the last episode registered in 2003. After a surge episode, the surface becomes highly unstable, with continuous ice degradation. We studied the response of the glacier surface in the post-surge stagnation period, based on six semi-continuous Global Navigation Satellite System (GNSS) stations distributed along the main axis of the glacier. Kinematic GNSS profiles were acquired over the surface, aiming to strengthen the GNSS measurements of elevation change. Our results show a horizontal surface displacement from 0.4 cmd-1 to 2.7 cmd-1, and a 0.8 cmd-1 mean elevation reduction during the 2009-2014 period. GNSS profiles also show a velocity increase, ranging from -1.1 cmd-1 in 2012 to -1.8 cmd-1 in 2013. Changing surface velocities in the HIG may be related to the presence of a thick debris cover, in combination with faster glacier degradation due to thickness loss after the 2003 surge, and glacier-climate interaction.
author	Lenzano,M. Gabriela Lenzano,Luis Barón,Jorge Lannutti,Esteban Durand,Marcelo Trombotto Liaudat,Dario
author_facet	Lenzano,M. Gabriela Lenzano,Luis Barón,Jorge Lannutti,Esteban Durand,Marcelo Trombotto Liaudat,Dario
author_sort	Lenzano,M. Gabriela
title	Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
title_short	Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
title_full	Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
title_fullStr	Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
title_full_unstemmed	Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)
title_sort	thinning of the horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous gnss geodetic surveys (mt. aconcagua, argentina)
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062016000100003
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Thinning of the Horcones inferior debris-covered glacier, derived from five ablation seasons by semi-continuous GNSS geodetic surveys (Mt. Aconcagua, Argentina)

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