Retreat of Glaciar Tyndall, Patagonia, over the last half-century

We report measurements of ice surface elevation, ice thickness and surface area for Glaciar Tyndall, Patagonia, made in 1999-2002. The measurements, together with previously published observations, show acceleration over the last few decades of the rates of thinning and retreat of the main calving f...

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Published in:Journal of Glaciology
Main Authors: Raymond, C, Neumann, TA, Rignot, E, Echelmeyer, K, Rivera, A, Casassa, G
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2005
Subjects:
Patagonia
Journal of Glaciology
Online Access:http://www.escholarship.org/uc/item/2dj4h5qm
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spelling ftcdlib:qt2dj4h5qm 2023-05-15T16:57:38+02:00 Retreat of Glaciar Tyndall, Patagonia, over the last half-century Raymond, C Neumann, TA Rignot, E Echelmeyer, K Rivera, A Casassa, G 239 - 247 2005-01-01 application/pdf http://www.escholarship.org/uc/item/2dj4h5qm english eng eScholarship, University of California qt2dj4h5qm http://www.escholarship.org/uc/item/2dj4h5qm Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Raymond, C; Neumann, TA; Rignot, E; Echelmeyer, K; Rivera, A; & Casassa, G. (2005). Retreat of Glaciar Tyndall, Patagonia, over the last half-century. Journal of Glaciology, 51(173), 239 - 247. doi:10.3189/172756505781829476. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2dj4h5qm article 2005 ftcdlib https://doi.org/10.3189/172756505781829476 2018-07-06T22:51:35Z We report measurements of ice surface elevation, ice thickness and surface area for Glaciar Tyndall, Patagonia, made in 1999-2002. The measurements, together with previously published observations, show acceleration over the last few decades of the rates of thinning and retreat of the main calving front. The acceleration of shrinkage appears to be driven by a combination of climate and feedback processes, the dominant feedback being increased melting associated with lowering of the glacier surface (elevation feedback). The melting capacity in the main terminus lake is now too small to be a major factor accelerating the retreat. The glacier bed has low slope and remains below the elevation of the lake spillway for >14 km upstream from the 2000 calving front, indicating the potential for extensive retreat under the influence of strong elevation feedback and increasing interaction with the lake as it enlarges. Article in Journal/Newspaper Journal of Glaciology University of California: eScholarship Patagonia Journal of Glaciology 51 173 239 247
institution Open Polar
collection University of California: eScholarship
op_collection_id ftcdlib
language English
description We report measurements of ice surface elevation, ice thickness and surface area for Glaciar Tyndall, Patagonia, made in 1999-2002. The measurements, together with previously published observations, show acceleration over the last few decades of the rates of thinning and retreat of the main calving front. The acceleration of shrinkage appears to be driven by a combination of climate and feedback processes, the dominant feedback being increased melting associated with lowering of the glacier surface (elevation feedback). The melting capacity in the main terminus lake is now too small to be a major factor accelerating the retreat. The glacier bed has low slope and remains below the elevation of the lake spillway for >14 km upstream from the 2000 calving front, indicating the potential for extensive retreat under the influence of strong elevation feedback and increasing interaction with the lake as it enlarges.
format Article in Journal/Newspaper
author Raymond, C
Neumann, TA
Rignot, E
Echelmeyer, K
Rivera, A
Casassa, G
spellingShingle Raymond, C
Neumann, TA
Rignot, E
Echelmeyer, K
Rivera, A
Casassa, G
Retreat of Glaciar Tyndall, Patagonia, over the last half-century
author_facet Raymond, C
Neumann, TA
Rignot, E
Echelmeyer, K
Rivera, A
Casassa, G
author_sort Raymond, C
title Retreat of Glaciar Tyndall, Patagonia, over the last half-century
title_short Retreat of Glaciar Tyndall, Patagonia, over the last half-century
title_full Retreat of Glaciar Tyndall, Patagonia, over the last half-century
title_fullStr Retreat of Glaciar Tyndall, Patagonia, over the last half-century
title_full_unstemmed Retreat of Glaciar Tyndall, Patagonia, over the last half-century
title_sort retreat of glaciar tyndall, patagonia, over the last half-century
publisher eScholarship, University of California
publishDate 2005
url http://www.escholarship.org/uc/item/2dj4h5qm
op_coverage 239 - 247
geographic Patagonia
geographic_facet Patagonia
genre Journal of Glaciology
genre_facet Journal of Glaciology
op_source Raymond, C; Neumann, TA; Rignot, E; Echelmeyer, K; Rivera, A; & Casassa, G. (2005). Retreat of Glaciar Tyndall, Patagonia, over the last half-century. Journal of Glaciology, 51(173), 239 - 247. doi:10.3189/172756505781829476. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2dj4h5qm
op_relation qt2dj4h5qm
http://www.escholarship.org/uc/item/2dj4h5qm
op_rights Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/
op_rightsnorm CC-BY
op_doi https://doi.org/10.3189/172756505781829476
container_title Journal of Glaciology
container_volume 51
container_issue 173
container_start_page 239
op_container_end_page 247
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