Santa Cruz river basin’s glacier dynamic: fresh water of future
The largest glacier area in Argentina is located in the Santa Cruz River Basin (CRS), Southern Patagonian Andes. The CRS concentrates 35% of the entire national glacier cover (including the sub-Antarctic islands), and 52% if only the Andes are considered.Its 3023 km2 are distributed in a thousand gl...
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Facultad de Filosofía y Letras, Universidad Nacional de Cuyo
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ftunivncujoojs:oai:revistas.uncu.edu.ar:article/5517 2024-09-15T17:46:30+00:00 Santa Cruz river basin’s glacier dynamic: fresh water of future Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro Lo Vecchio Repetto, Andrés 2021-12-20 application/pdf https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 spa spa Facultad de Filosofía y Letras, Universidad Nacional de Cuyo https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517/4210 https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 https://creativecommons.org/licenses/by-nc/4.0 Boletín de Estudios Geográficos; No. 116; 187-214 Boletín de Estudios Geográficos; Núm. 116; 187-214 2525-1813 0374-6186 Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivncujoojs 2024-07-01T03:15:17Z The largest glacier area in Argentina is located in the Santa Cruz River Basin (CRS), Southern Patagonian Andes. The CRS concentrates 35% of the entire national glacier cover (including the sub-Antarctic islands), and 52% if only the Andes are considered.Its 3023 km2 are distributed in a thousand glaciers, although between seven of them accumulate ~80% of that area (Viedma, Upsala, Onelli, Spegazzini, Mayo, Ameghino, and Perito Moreno). These seven glaciers end in proglacial lakes, which stimulate processes of acceleration, fracture, and detachment of glacial ice (detachment glaciers). The thesis aims to determine the multiscale relationships between the dynamics of the detachment glaciers of the CRS, the natural triggering processes, and their impacts on the geographic space. To this end, the analysis of the last two decades is proposed through different satellite platforms and the thematic information available. In this work, the glaciological indicators analyzed are frontal position changes and supraglacial melting events. For synthesis purposes, the results show a cumulative retraction of 19 ± 0.3 km during the whole study period, although withheterogeneous individual behaviors. Between 1985 and 2017 the Upsala glacier retreated 8287 ± 60 m, at the same time Moreno glacier advanced 101 ± 60 m. Spegazzini glacier is another glacier that sustained its position in that period, immediately south of Onelli glacier which retreated 3069 ± 60 m. The above suggests the multicausal of glacial dynamics and the inexistence of a single forcer. In terms of melting events (2001-2016), the extent occupied by these has a marked seasonality, frequent during the summer months even at high summits (>3000 m). During the warm period (October/April) more than 50% of the glacier area was melting (with maximums of 75% in the summer of 2013). In contrast, in the cold phase, they were drastically reduced and even absent in the months of June-July. In CRS, melt events began to increase from 2010, with a positive trend. The ... Article in Journal/Newspaper Antarc* Antarctic Revistas UNCuyo (Universidad Nacional de Cuyo) |
institution |
Open Polar |
collection |
Revistas UNCuyo (Universidad Nacional de Cuyo) |
op_collection_id |
ftunivncujoojs |
language |
Spanish |
topic |
Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica |
spellingShingle |
Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica Lo Vecchio Repetto, Andrés Santa Cruz river basin’s glacier dynamic: fresh water of future |
topic_facet |
Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica |
description |
The largest glacier area in Argentina is located in the Santa Cruz River Basin (CRS), Southern Patagonian Andes. The CRS concentrates 35% of the entire national glacier cover (including the sub-Antarctic islands), and 52% if only the Andes are considered.Its 3023 km2 are distributed in a thousand glaciers, although between seven of them accumulate ~80% of that area (Viedma, Upsala, Onelli, Spegazzini, Mayo, Ameghino, and Perito Moreno). These seven glaciers end in proglacial lakes, which stimulate processes of acceleration, fracture, and detachment of glacial ice (detachment glaciers). The thesis aims to determine the multiscale relationships between the dynamics of the detachment glaciers of the CRS, the natural triggering processes, and their impacts on the geographic space. To this end, the analysis of the last two decades is proposed through different satellite platforms and the thematic information available. In this work, the glaciological indicators analyzed are frontal position changes and supraglacial melting events. For synthesis purposes, the results show a cumulative retraction of 19 ± 0.3 km during the whole study period, although withheterogeneous individual behaviors. Between 1985 and 2017 the Upsala glacier retreated 8287 ± 60 m, at the same time Moreno glacier advanced 101 ± 60 m. Spegazzini glacier is another glacier that sustained its position in that period, immediately south of Onelli glacier which retreated 3069 ± 60 m. The above suggests the multicausal of glacial dynamics and the inexistence of a single forcer. In terms of melting events (2001-2016), the extent occupied by these has a marked seasonality, frequent during the summer months even at high summits (>3000 m). During the warm period (October/April) more than 50% of the glacier area was melting (with maximums of 75% in the summer of 2013). In contrast, in the cold phase, they were drastically reduced and even absent in the months of June-July. In CRS, melt events began to increase from 2010, with a positive trend. The ... |
format |
Article in Journal/Newspaper |
author |
Lo Vecchio Repetto, Andrés |
author_facet |
Lo Vecchio Repetto, Andrés |
author_sort |
Lo Vecchio Repetto, Andrés |
title |
Santa Cruz river basin’s glacier dynamic: fresh water of future |
title_short |
Santa Cruz river basin’s glacier dynamic: fresh water of future |
title_full |
Santa Cruz river basin’s glacier dynamic: fresh water of future |
title_fullStr |
Santa Cruz river basin’s glacier dynamic: fresh water of future |
title_full_unstemmed |
Santa Cruz river basin’s glacier dynamic: fresh water of future |
title_sort |
santa cruz river basin’s glacier dynamic: fresh water of future |
publisher |
Facultad de Filosofía y Letras, Universidad Nacional de Cuyo |
publishDate |
2021 |
url |
https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Boletín de Estudios Geográficos; No. 116; 187-214 Boletín de Estudios Geográficos; Núm. 116; 187-214 2525-1813 0374-6186 |
op_relation |
https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517/4210 https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 |
op_rights |
https://creativecommons.org/licenses/by-nc/4.0 |
_version_ |
1810494709377794048 |