De-icing landsystem model for the Universidad Glacier (34° S) in the Central Andes of Chile during the past ∼660 years

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dc.contributor.authorFernandez, Hans
dc.contributor.authorGarcia, Juan-Luis
dc.contributor.authorNussbaumer, Samuel U.
dc.contributor.authorJanine Geiger, Alessa
dc.contributor.authorGartner-Roer, Isabelle
dc.contributor.authorPerez, Francia
dc.contributor.authorTikhomirov, Dmitry
dc.contributor.authorChristl, Marcus
dc.contributor.authorEgli, Markus
dc.date.accessioned2025-01-20T21:09:12Z
dc.date.available2025-01-20T21:09:12Z
dc.date.issued2022
dc.description.abstractReconstructing latest Holocene (< 1000 years) glacial landscape development in the Central Andes of Chile (30-35 degrees S) is key for understanding the response of the cryosphere during periods of negative glacier mass balance, such as the current one. The excellently preserved glacial landscape produced during the latest ice advance and retreat cycle is of particular interest for examining the detailed response of glaciers to deglaciation. To establish a conceptual model of glacier behavior under warm and dry climatic conditions, we reconstructed and dated the recent glacial history of the Universidad Glacier (34 degrees S) through detailed geomorphological mapping and Be-10 cosmogenic surface exposure dating. Our mapping describes a landsystem that spans from the current ice front to similar to 3 km down-valley, where a mosaic of glacial landforms includes mounded relief; sinkholes; debris -filled stripes; moraine belts; flutings; and a prominent basal till plain. Our Be-10 ages suggest that the Universidad Glacier has fluctuated in its forefield since the 13th - 15th centuries CE. We propose that the glacier evolved from a clean glacier to a debris-covered glacier, to an ice-cored moraine, and finally, to a massive dead-ice topography. This deglacial evolution intermittent and potentially reset by multiple standstills and/or re-advances during the overall retreat. The implication is that phases of active ice were followed by stagnation associated with progressive melting of dead ice under the supraglacial debris layer. Similar geomorphic features and processes are recorded in the present-day Universidad Glacier ablation zone, denoting a recurrent reconditioning over time analogous to the glacier's evolution during the latest Holocene.(C) 2022 Elsevier B.V. All rights reserved.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.geomorph.2021.108096
dc.identifier.eissn1872-695X
dc.identifier.issn0169-555X
dc.identifier.urihttps://doi.org/10.1016/j.geomorph.2021.108096
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93517
dc.identifier.wosidWOS:000778312100002
dc.language.isoen
dc.revistaGeomorphology
dc.rightsacceso restringido
dc.subjectLatest Holocene
dc.subjectDebris-covered glaciers
dc.subjectIce-cored moraine
dc.subjectGlacial geochronology
dc.subjectParaglacial
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleDe-icing landsystem model for the Universidad Glacier (34° S) in the Central Andes of Chile during the past ∼660 years
dc.typeartículo
dc.volumen400
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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