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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2005
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ftcdlib:oai:escholarship.org:ark:/13030/qt2dj4h5qm 2023-06-11T04:13:21+02:00 Retreat of Glaciar Tyndall, Patagonia, over the last half-century Raymond, Charles Neumann, Thomas A Rignot, Eric Echelmeyer, Keith Rivera, Andrés Casassa, Gino 239 - 247 2005-01-01 application/pdf https://escholarship.org/uc/item/2dj4h5qm unknown eScholarship, University of California qt2dj4h5qm https://escholarship.org/uc/item/2dj4h5qm CC-BY Journal of Glaciology, vol 51, iss 173 Climate Action Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences article 2005 ftcdlib 2023-05-29T17:59:12Z 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 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
spellingShingle |
Climate Action Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences Raymond, Charles Neumann, Thomas A Rignot, Eric Echelmeyer, Keith Rivera, Andrés Casassa, Gino Retreat of Glaciar Tyndall, Patagonia, over the last half-century |
topic_facet |
Climate Action Physical Geography and Environmental Geoscience Meteorology & Atmospheric Sciences |
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, Charles Neumann, Thomas A Rignot, Eric Echelmeyer, Keith Rivera, Andrés Casassa, Gino |
author_facet |
Raymond, Charles Neumann, Thomas A Rignot, Eric Echelmeyer, Keith Rivera, Andrés Casassa, Gino |
author_sort |
Raymond, Charles |
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 |
https://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 |
Journal of Glaciology, vol 51, iss 173 |
op_relation |
qt2dj4h5qm https://escholarship.org/uc/item/2dj4h5qm |
op_rights |
CC-BY |
_version_ |
1768390270491033600 |