New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery
Automatic feature tracking on two Landsat images (acquired in January 2000 and December 2001) generates a complete velocity field of Mertz Glacier, East Antarctica. This velocity field shows two main tributaries to the ice stream. Between the tributaries, a likely obstruction feature in the bedrock...
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2003
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Online Access: | https://hal.science/hal-00404828 https://hal.science/hal-00404828/document https://hal.science/hal-00404828/file/new-velocity-map-and-mass-balance-estimate-of-mertz-glacier-east-antarctica-derived-from-landsat-sequential-imagery.pdf |
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ftmeteofrance:oai:HAL:hal-00404828v1 2023-12-17T10:19:18+01:00 New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery Berthier, E. Raup, B. Scambos, T. Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) National Snow and Ice Data Center (NSIDC) University of Colorado Boulder 2003 https://hal.science/hal-00404828 https://hal.science/hal-00404828/document https://hal.science/hal-00404828/file/new-velocity-map-and-mass-balance-estimate-of-mertz-glacier-east-antarctica-derived-from-landsat-sequential-imagery.pdf en eng HAL CCSD International Glaciological Society hal-00404828 https://hal.science/hal-00404828 https://hal.science/hal-00404828/document https://hal.science/hal-00404828/file/new-velocity-map-and-mass-balance-estimate-of-mertz-glacier-east-antarctica-derived-from-landsat-sequential-imagery.pdf http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal.science/hal-00404828 Journal of Glaciology, 2003, 49 (167), pp.503-511 [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2003 ftmeteofrance 2023-11-21T23:41:44Z Automatic feature tracking on two Landsat images (acquired in January 2000 and December 2001) generates a complete velocity field of Mertz Glacier, East Antarctica. This velocity field shows two main tributaries to the ice stream. Between the tributaries, a likely obstruction feature in the bedrock results in a slow-down of the flow. A third Landsat image, acquired in 1989 and combined with the 2000 image, permits the determination of the glacier mean velocity during the 1990s. Although some parts of the Mertz Glacier system show evidence of slight speed increase, we conclude that the Mertz flow speed is constant within our uncertainty (35 m a-1). Using this complete velocity field, new estimates of the ice discharge flux, 17.8 km**3/a (16.4 Gt/a), and of the basal melting of the tongue, 11m/a of ice, are given. Our results lead to an apparent imbalance of the drainage basin (ice discharge 3.5 km**3/a lower than the accumulation). Considering previous studies in the Mertz Glacier area, we discuss the uncertainty of this imbalance and the problems with accumulation mapping for this region. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Journal of Glaciology Mertz Glacier Météo-France: HAL East Antarctica Mertz Glacier ENVELOPE(144.500,144.500,-67.667,-67.667) |
institution |
Open Polar |
collection |
Météo-France: HAL |
op_collection_id |
ftmeteofrance |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Berthier, E. Raup, B. Scambos, T. New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
Automatic feature tracking on two Landsat images (acquired in January 2000 and December 2001) generates a complete velocity field of Mertz Glacier, East Antarctica. This velocity field shows two main tributaries to the ice stream. Between the tributaries, a likely obstruction feature in the bedrock results in a slow-down of the flow. A third Landsat image, acquired in 1989 and combined with the 2000 image, permits the determination of the glacier mean velocity during the 1990s. Although some parts of the Mertz Glacier system show evidence of slight speed increase, we conclude that the Mertz flow speed is constant within our uncertainty (35 m a-1). Using this complete velocity field, new estimates of the ice discharge flux, 17.8 km**3/a (16.4 Gt/a), and of the basal melting of the tongue, 11m/a of ice, are given. Our results lead to an apparent imbalance of the drainage basin (ice discharge 3.5 km**3/a lower than the accumulation). Considering previous studies in the Mertz Glacier area, we discuss the uncertainty of this imbalance and the problems with accumulation mapping for this region. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) National Snow and Ice Data Center (NSIDC) University of Colorado Boulder |
format |
Article in Journal/Newspaper |
author |
Berthier, E. Raup, B. Scambos, T. |
author_facet |
Berthier, E. Raup, B. Scambos, T. |
author_sort |
Berthier, E. |
title |
New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
title_short |
New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
title_full |
New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
title_fullStr |
New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
title_full_unstemmed |
New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat sequential imagery |
title_sort |
new velocity map and mass-balance estimate of mertz glacier, east antarctica, derived from landsat sequential imagery |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00404828 https://hal.science/hal-00404828/document https://hal.science/hal-00404828/file/new-velocity-map-and-mass-balance-estimate-of-mertz-glacier-east-antarctica-derived-from-landsat-sequential-imagery.pdf |
long_lat |
ENVELOPE(144.500,144.500,-67.667,-67.667) |
geographic |
East Antarctica Mertz Glacier |
geographic_facet |
East Antarctica Mertz Glacier |
genre |
Antarc* Antarctica East Antarctica Journal of Glaciology Mertz Glacier |
genre_facet |
Antarc* Antarctica East Antarctica Journal of Glaciology Mertz Glacier |
op_source |
ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://hal.science/hal-00404828 Journal of Glaciology, 2003, 49 (167), pp.503-511 |
op_relation |
hal-00404828 https://hal.science/hal-00404828 https://hal.science/hal-00404828/document https://hal.science/hal-00404828/file/new-velocity-map-and-mass-balance-estimate-of-mertz-glacier-east-antarctica-derived-from-landsat-sequential-imagery.pdf |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
_version_ |
1785582598448218112 |