Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro
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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| Formato: | Online |
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Facultad de Filosofía y Letras, Universidad Nacional de Cuyo
2021
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| Acceso en línea: | https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 |
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I11-R106article-5517 |
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Universidad Nacional de Cuyo |
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Revistas en línea |
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Revistas en línea |
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Boletín de Estudios Geográficos |
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Boletín de Estudios Geográficos |
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I-11 |
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R-106 |
| language |
spa |
| format |
Online |
| author |
Lo Vecchio Repetto, Andrés |
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Lo Vecchio Repetto, Andrés Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica. |
| author_facet |
Lo Vecchio Repetto, Andrés |
| author_sort |
Lo Vecchio Repetto, Andrés |
| title |
Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro |
| title_short |
Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro |
| title_full |
Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro |
| title_fullStr |
Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro |
| title_full_unstemmed |
Dinámica glaciar de la cuenca del río Santa Cruz, Andes Patagónicos Australes: el agua del futuro |
| title_sort |
santa cruz river basin’s glacier dynamic: fresh water of future |
| 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 consequences of glacial dynamics have played a key role in the possibilities for the configuration of humanized spaces. These places are structured according to these dynamics, either because of exposure to glacial hazards or because they represent the main source of foreign exchange for the basin: glacier tourism. |
| 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 |
| topic |
Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica. |
| topic_facet |
Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica. |
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AT lovecchiorepettoandres santacruzriverbasinsglacierdynamicfreshwateroffuture AT lovecchiorepettoandres dinamicaglaciardelacuencadelriosantacruzandespatagonicosaustraleselaguadelfuturo |
| _version_ |
1800220853684666368 |
| spelling |
I11-R106article-55172022-02-08T16:00:31Z 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 Glaciers and society Santa Cruz river basin Historical glacial dynamics Glaciares y sociedad cuenca del río Santa Cruz Dinámica glaciar histórica. 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 consequences of glacial dynamics have played a key role in the possibilities for the configuration of humanized spaces. These places are structured according to these dynamics, either because of exposure to glacial hazards or because they represent the main source of foreign exchange for the basin: glacier tourism. La superficie glaciar más extensa de la República Argentina se encuentra en la cuenca del río Santa Cruz (CRS), Andes Patagónicos Australes. La CRS concentra el 35% de toda la cubierta glacial nacional (incluidas las islas subantárticas), y el 52 % si solo seconsideran los Andes. Sus 3023 km2 están distribuidos en un millar de glaciares, aunque entre siete de ellos acumulan el ~80 % de esa área (Viedma, Upsala, Onelli, Spegazzini, Mayo, Ameghino y Perito Moreno). Esos siete glaciares terminan en lagosproglaciares, lo cual estimula procesos de aceleración, fractura y desprendimiento de hielo glaciar (glaciares de desprendimiento). El objetivo de la tesis es determinar las relaciones multiescalares existentes entre la dinámica de los glaciares dedesprendimiento de la CRS, los procesos naturales disparadores, y sus impactos en el espacio geográfico. Para tal fin se propone el análisis de las últimas dos décadas a través de diferentes plataformas satelitales e información temática disponible. En estetrabajo, los indicadores glaciológicos analizados son los cambios de posición frontal y los eventos de fusión supraglacial. A efectos de síntesis, los resultados muestran una retracción acumulada de 19 ± 0,3 km durante todo el periodo de estudio, aunque concomportamientos individuales heterogéneos. Entre 1985 y 2017 el glaciar Upsala retrocedió 8287 ± 60 m, al mismo tiempo que glaciar Moreno avanzó 101 ± 60 m. El glaciar Spegazzini es otro glaciar que sostuvo su posición en ese periodo, inmediatamente al sur del glaciar Onelli que retrocedió 3069 ± 60 m. Lo anterior sugiere la multicausalidad de la dinámica glaciar y la inexistencia de un único forzante. En términos de eventos de fusión (2001-2016), la extensión ocupada por estos tiene una marcada estacionalidad, frecuentes durante los meses de verano incluso en las altas cumbres (>3000 m). Durante el periodo estival (octubre/abril) más del 50 % del área glaciar estuvo en fusión (con máximos del 75% en el verano del 2013). Por el contrario, durante la fase invernal se redujeron drásticamente e incluso se ausentaron en los meses de junio-julio. En términos de cuenca, los eventos de fusión comenzaron a aumentar a partir del 2010, con una tendencia positiva a favor de su expansión. Las consecuencias de la dinámica glaciar han jugado un rol clave en las posibilidades de configuración de espacios humanizados. Esos enclaves están estructurados en función de esa dinámica, ya sea por la exposición a amenazas de origen glaciar o bien por significar la principal fuente de divisas para la cuenca: el turismo glaciar. Facultad de Filosofía y Letras, Universidad Nacional de Cuyo 2021-12-20 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517 Boletín de Estudios Geográficos; No. 116; 187-214 Boletín de Estudios Geográficos; Núm. 116; 187-214 2525-1813 0374-6186 spa https://revistas.uncu.edu.ar/ojs3/index.php/beg/article/view/5517/4210 https://creativecommons.org/licenses/by-nc/4.0 |
