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Authordc.contributor.authorWilson, Ryan 
Authordc.contributor.authorCarrión, Daniela 
Authordc.contributor.authorRivera Ibáñez, Sergio 
Cita de ítemdc.identifier.citationAnnals of Glaciology 57(73) 2016es_ES
Abstractdc.description.abstractIn contrast to the general trend for glaciers of the Southern Patagonia Icefield, Glaciar Pio XI has experienced a large cumulative frontal advance since 1945. In an effort to better understand this advancing behaviour, this paper presents a synoptic analysis of frontal fluctuations (1998-2014), ice velocities (1986-2014), ice-surface elevations (1975-2007) and supraglacial moraines (1945-2014) derived from geospatial datasets. These analyses reveal changes in the ice flow of Glaciar Pio XI's freshwater calving northern terminus and tidewater calving southern terminus over recent decades. Between 1986 and 2000, ice flow speed generally accelerated reaching peaks of > 15 m d(-1) at the frontal edge of the southern terminus. Following this period, flow speed decreased, reducing to < 1 m d(-1) for the central part of the southern terminus in 2014, despite advancing to a neoglacial maximum. From 2000 to 2014 the reduction in speed was accompanied by a shift in maximum velocity away from the southern terminus, towards the central glacier trunk. As a result, the northern terminus, which accelerated during this period, represented the new primary flow path in 2014. Notably, the moraine maps presented highlight surges occurring around 1981 and again between 1997 and 2000, marked by arcuate moraine features on the southern terminuses_ES
Patrocinadordc.description.sponsorshipChilean Government through Centers of Excellence Base Financing Program of Comision Nacional de Investigacion y Tecnologica de Chile (CONICYT)es_ES
Publisherdc.publisherCambridge University Presses_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceAnnals of Glaciologyes_ES
Keywordsdc.subjectFrontal advancees_ES
Keywordsdc.subjectIce thickening ice velocityes_ES
Keywordsdc.subjectRemote sensinges_ES
Keywordsdc.subjectSurge-type glacieres_ES
Títulodc.titleDetailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefieldes_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile