Frontal destabilization of Stonebreen, Edgeøya, Svalbard
In consideration of the strong atmospheric warming that has been observed since the 1990s in polar regions there is a need to quantify mass loss of Arctic ice caps and glaciers and their contribution to sea level rise. In polar regions a large part of glacier ablation is through calving of tidewater...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-02-01
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| Series: | The Cryosphere |
| Online Access: | http://www.the-cryosphere.net/11/553/2017/tc-11-553-2017.pdf |
| _version_ | 1818929569028112384 |
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| author | T. Strozzi A. Kääb T. Schellenberger |
| author_facet | T. Strozzi A. Kääb T. Schellenberger |
| author_sort | T. Strozzi |
| collection | DOAJ |
| description | In consideration of the strong atmospheric warming
that has been observed since the 1990s in polar regions there is a need to quantify mass loss of Arctic ice caps and glaciers and their contribution to sea level rise. In polar regions a large part of glacier ablation is through calving of tidewater glaciers driven by ice velocities and their variations. The
Svalbard region is characterized by glaciers with rapid dynamic fluctuations
of different types, including irreversible adjustments of calving fronts to a
changing mass balance and reversible, surge-type activities. For large areas,
however, we do not have much past and current information on glacier dynamic
fluctuations. Recently, through frequent monitoring based on repeat optical
and synthetic aperture radar (SAR) satellite data, a number of zones of velocity increases have been observed at formerly slow-flowing calving fronts on Svalbard. Here we present the dynamic evolution of the southern lobe of Stonebreen on Edgeøya. We observe a slowly steady retreat of the glacier front from 1971 until 2011, followed by a strong increase in ice surface velocity along with a decrease of volume and frontal extension since 2012. The considerable losses in ice thickness could have made the tide-water calving glacier, which is grounded below sea level some 6 km inland from the 2014 front, more sensitive to surface meltwater reaching its bed and/or warm ocean water increasing frontal ablation with subsequent strong multi-annual ice-flow acceleration. |
| first_indexed | 2024-12-20T03:46:53Z |
| format | Article |
| id | doaj.art-be23a2d9c085410e98cceda571b851d3 |
| institution | Directory Open Access Journal |
| issn | 1994-0416 1994-0424 |
| language | English |
| last_indexed | 2024-12-20T03:46:53Z |
| publishDate | 2017-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The Cryosphere |
| spelling | doaj.art-be23a2d9c085410e98cceda571b851d32022-12-21T19:54:36ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242017-02-0111155356610.5194/tc-11-553-2017Frontal destabilization of Stonebreen, Edgeøya, SvalbardT. Strozzi0A. Kääb1T. Schellenberger2Gamma Remote Sensing, Worbstrasse 225, 3073 Gümligen, SwitzerlandDepartment of Geosciences, University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, NorwayDepartment of Geosciences, University of Oslo, P.O. Box 1047, Blindern, 0316 Oslo, NorwayIn consideration of the strong atmospheric warming that has been observed since the 1990s in polar regions there is a need to quantify mass loss of Arctic ice caps and glaciers and their contribution to sea level rise. In polar regions a large part of glacier ablation is through calving of tidewater glaciers driven by ice velocities and their variations. The Svalbard region is characterized by glaciers with rapid dynamic fluctuations of different types, including irreversible adjustments of calving fronts to a changing mass balance and reversible, surge-type activities. For large areas, however, we do not have much past and current information on glacier dynamic fluctuations. Recently, through frequent monitoring based on repeat optical and synthetic aperture radar (SAR) satellite data, a number of zones of velocity increases have been observed at formerly slow-flowing calving fronts on Svalbard. Here we present the dynamic evolution of the southern lobe of Stonebreen on Edgeøya. We observe a slowly steady retreat of the glacier front from 1971 until 2011, followed by a strong increase in ice surface velocity along with a decrease of volume and frontal extension since 2012. The considerable losses in ice thickness could have made the tide-water calving glacier, which is grounded below sea level some 6 km inland from the 2014 front, more sensitive to surface meltwater reaching its bed and/or warm ocean water increasing frontal ablation with subsequent strong multi-annual ice-flow acceleration.http://www.the-cryosphere.net/11/553/2017/tc-11-553-2017.pdf |
| spellingShingle | T. Strozzi A. Kääb T. Schellenberger Frontal destabilization of Stonebreen, Edgeøya, Svalbard The Cryosphere |
| title | Frontal destabilization of Stonebreen, Edgeøya, Svalbard |
| title_full | Frontal destabilization of Stonebreen, Edgeøya, Svalbard |
| title_fullStr | Frontal destabilization of Stonebreen, Edgeøya, Svalbard |
| title_full_unstemmed | Frontal destabilization of Stonebreen, Edgeøya, Svalbard |
| title_short | Frontal destabilization of Stonebreen, Edgeøya, Svalbard |
| title_sort | frontal destabilization of stonebreen edgeoya svalbard |
| url | http://www.the-cryosphere.net/11/553/2017/tc-11-553-2017.pdf |
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