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50 MHz helicopter-borne radar data for determination of glacier thermal regime in the central Chilean Andes

Authordc.contributor.authorGacitúa, Guisella 
Authordc.contributor.authorUribe, José A. 
Authordc.contributor.authorWilson, Ryan 
Authordc.contributor.authorLoriaux, Thomas 
Authordc.contributor.authorHernández, Jorge 
Authordc.contributor.authorRivera Ibáñez, Sergio 
Cita de ítemdc.identifier.citationAnnals of Glaciology 56(70) 2015en_US
Identifierdc.identifier.otherDOI: 10.3189/2015AoG70A953
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractDespite their importance as freshwater reservoirs for downstream river systems, few glaciers in central Chile have been comprehensively surveyed. This study presents ground-penetrating radar (GPR) and field-based observations for characterizing the englacial and basal conditions of Glaciar Olivares Alfa (33°110 S, 70°130 W), central Chilean Andes. Using a 50MHz radar mounted onto a helicopter platform, data were collected covering large portions of the glacier accumulation and ablation zones. The radar data revealed boundaries of a temperate-ice layer at the base of the eastern body of Glaciar Olivares Alfa which appears to be covered by colder ice that extends throughout large parts of the glacier. The thickness of the temperate ice layer is highly variable across the glacier, being on average 40% of the total ice thickness. Radar data analyses reveal regions of cold ice at the bottom/ base of the glacier and also patterns of highly saturated sediments beneath the glacier. Using GPR data, this study represents the most exhaustive analysis of glacier ice structure performed in the central Chilean Andes. The results will enable improved estimations of the glacier’s mass balance and ice dynamics, helping us to understand its further development and its impact on water availability.en_US
Patrocinadordc.description.sponsorshipBasal Financing Program of the Scientific and Technological National Commission of Chile (CONICYT) CODELCO Andina Division mining company Anglo American Chile mining company
Publisherdc.publisherInt Glaciol Soc
Type of licensedc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
Link to Licensedc.rights.uri*
Keywordsdc.subjectAerogeophysical measurementsen_US
Keywordsdc.subjectApplied glaciologyen_US
Keywordsdc.subjectBasal iceen_US
Keywordsdc.subjectGlacial geomorphologyen_US
Títulodc.title50 MHz helicopter-borne radar data for determination of glacier thermal regime in the central Chilean Andesen_US
Document typedc.typeArtículo de revistaen_US

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Atribución-NoComercial-SinDerivadas 3.0 Chile
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Chile