2024-03-29T15:34:21Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/406382021-06-23T10:28:09Zcom_10324_1161com_10324_931com_10324_894col_10324_1318
UVaDOC
author
López Moreno, Juan Ignacio
author
Revuelto, Jesús
author
Rico, Ibai
author
Chueca Cía, Javier
author
Julián, Asunción
author
Serreta, Alfredo
author
Serrano Cañadas, Enrique
author
Vicente Serrano, Sergio Martín
author
Azorin Molina, Cesar
author
Alonso González, Esteban
author
García Ruiz, José María
2020-03-13T10:23:50Z
2020-03-13T10:23:50Z
2016
The Cryosphere, 2016, vol. 10, n. 2. p. 681-694
1994-0424
http://uvadoc.uva.es/handle/10324/40638
10.5194/tc-10-681-2016
This paper analyzes the evolution of the Monte Perdido Glacier, the third largest glacier in the Pyrenees, from 1981 to the present. We assessed the evolution of the glacier's surface area by analysis of aerial photographs from 1981, 1999, and 2006, and changes in ice volume by geodetic methods with digital elevation models (DEMs) generated from topographic maps (1981 and 1999), airborne lidar (2010) and terrestrial laser scanning (TLS, 2011, 2012, 2013, and 2014) data. We interpreted the changes in the glacier based on climate data from nearby meteorological stations. The results indicate that the degradation of this glacier accelerated after 1999. The rate of ice surface loss was almost three times greater during 1999–2006 than during earlier periods. Moreover, the rate of glacier thinning was 1.85 times faster during 1999–2010 (rate of surface elevation change = −8.98 ± 1.80 m, glacier-wide mass balance = −0.73 ± 0.14 m w.e. yr−1) than during 1981–1999 (rate of surface elevation change = −8.35 ± 2.12 m, glacier-wide mass balance = −0.42 ± 0.10 m w.e. yr−1). From 2011 to 2014, ice thinning continued at a slower rate (rate of surface elevation change = −1.93 ± 0.4 m yr−1, glacier-wide mass balance = −0.58 ± 0.36 m w.e. yr−1). This deceleration in ice thinning compared to the previous 17 years can be attributed, at least in part, to two consecutive anomalously wet winters and cool summers (2012–2013 and 2013–2014), counteracted to some degree by the intense thinning that occurred during the dry and warm 2011–2012 period. However, local climatic changes observed during the study period do not seem sufficient to explain the acceleration of ice thinning of this glacier, because precipitation and air temperature did not exhibit statistically significant trends during the study period. Rather, the accelerated degradation of this glacier in recent years can be explained by a strong disequilibrium between the glacier and the current climate, and likely by other factors affecting the energy balance (e.g., increased albedo in spring) and feedback mechanisms (e.g., heat emitted from recently exposed bedrock and debris covered areas).
eng
Attribution-NonCommercial-NoDerivs 3.0 Unported
Geomorfología - España - Monte Perdido
Thinning of the Monte Perdido Glacier in the Spanish Pyrenees since 1981
info:eu-repo/semantics/article
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b3IgaW5jdW1wbGltaWVudG8gZGUgY3VhbHF1aWVyYSBkZSBsYXMgb2JsaWdhY2lvbmVzIGRlcml2YWRhcyBkZWwgQWN1ZXJkbywgcG9yIHZvbHVudGFkIGV4cHJlc2EgZGVsIEF1dG9yCkVuICBwcnVlYmEgZGUgY29uZm9ybWlkYWQsIGxhcyBwYXJ0ZXMgYWNlcHRhbiBlbCBwcmVzZW50ZSBBY3VlcmRvCgoKCgo=
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https://uvadoc.uva.es/bitstream/10324/40638/1/Thinning-Monte-Perdido-Glacier.pdf
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Thinning-Monte-Perdido-Glacier.pdf