Changes in glacier dynamics in the northern Antarctic Peninsula since 1985
The climatic conditions along the northern Antarctic Peninsula have shown significant changes within the last 50 years. Here we present a comprehensive analysis of temporally and spatially detailed observations of the changes in ice dynamics along both the east and west coastlines of the northern An...
Published in: | The Cryosphere |
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2018
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Online Access: | https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10880 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-108809 https://doi.org/10.5194/tc-12-577-2018 https://opus4.kobv.de/opus4-fau/files/10880/Seehaus_changes.pdf |
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ftuniverlangen:oai:ub.uni-erlangen.de-opus:10880 2023-05-15T13:39:00+02:00 Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 Seehaus, Thorsten Cook, Alison J. Silva, Aline B. Braun, Matthias 2018 application/pdf https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10880 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-108809 https://doi.org/10.5194/tc-12-577-2018 https://opus4.kobv.de/opus4-fau/files/10880/Seehaus_changes.pdf eng eng https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10880 urn:nbn:de:bvb:29-opus4-108809 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-108809 https://doi.org/10.5194/tc-12-577-2018 https://opus4.kobv.de/opus4-fau/files/10880/Seehaus_changes.pdf https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess CC-BY ddc:500 article doc-type:article 2018 ftuniverlangen https://doi.org/10.5194/tc-12-577-2018 2022-07-28T20:38:00Z The climatic conditions along the northern Antarctic Peninsula have shown significant changes within the last 50 years. Here we present a comprehensive analysis of temporally and spatially detailed observations of the changes in ice dynamics along both the east and west coastlines of the northern Antarctic Peninsula. Temporal evolutions of glacier area (1985–2015) and ice surface velocity (1992–2014) are derived from a broad multi-mission remote sensing database for 74 glacier basins on the northern Antarctic Peninsula ( < 65°S along the west coast and north of the Seal Nunataks on the east coast). A recession of the glaciers by 238.81km2 is found for the period 1985–2015, of which the glaciers affected by ice shelf disintegration showed the largest retreat by 208.59km2. Glaciers on the east coast north of the former Prince Gustav Ice Shelf extent in 1986 receded by only 21.07km2 (1985–2015) and decelerated by about 58% on average (1992–2014). A dramatic acceleration after ice shelf disintegration with a subsequent deceleration is observed at most former ice shelf tributaries on the east coast, combined with a significant frontal retreat. In 2014, the flow speed of the former ice shelf tributaries was 26% higher than before 1996. Along the west coast the average flow speeds of the glaciers increased by 41%. However, the glaciers on the western Antarctic Peninsula revealed a strong spatial variability of the changes in ice dynamics. By applying a hierarchical cluster analysis, we show that this is associated with the geometric parameters of the individual glacier basins (hypsometric indexes, maximum surface elevation of the basin, flux gate to catchment size ratio). The heterogeneous spatial pattern of ice dynamic evolutions at the northern Antarctic Peninsula shows that temporally and spatially detailed observations as well as further monitoring are necessary to fully understand glacier change in regions with such strong topographic and climatic variances. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Shelf Prince Gustav Ice Shelf OPUS FAU - Online publication system of Friedrich-Alexander-Universität Erlangen-Nürnberg Antarctic Antarctic Peninsula Prince Gustav Ice Shelf ENVELOPE(-58.250,-58.250,-64.200,-64.200) Seal Nunataks ENVELOPE(-60.255,-60.255,-65.049,-65.049) The Cryosphere 12 2 577 594 |
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Open Polar |
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OPUS FAU - Online publication system of Friedrich-Alexander-Universität Erlangen-Nürnberg |
op_collection_id |
ftuniverlangen |
language |
English |
topic |
ddc:500 |
spellingShingle |
ddc:500 Seehaus, Thorsten Cook, Alison J. Silva, Aline B. Braun, Matthias Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
topic_facet |
ddc:500 |
description |
The climatic conditions along the northern Antarctic Peninsula have shown significant changes within the last 50 years. Here we present a comprehensive analysis of temporally and spatially detailed observations of the changes in ice dynamics along both the east and west coastlines of the northern Antarctic Peninsula. Temporal evolutions of glacier area (1985–2015) and ice surface velocity (1992–2014) are derived from a broad multi-mission remote sensing database for 74 glacier basins on the northern Antarctic Peninsula ( < 65°S along the west coast and north of the Seal Nunataks on the east coast). A recession of the glaciers by 238.81km2 is found for the period 1985–2015, of which the glaciers affected by ice shelf disintegration showed the largest retreat by 208.59km2. Glaciers on the east coast north of the former Prince Gustav Ice Shelf extent in 1986 receded by only 21.07km2 (1985–2015) and decelerated by about 58% on average (1992–2014). A dramatic acceleration after ice shelf disintegration with a subsequent deceleration is observed at most former ice shelf tributaries on the east coast, combined with a significant frontal retreat. In 2014, the flow speed of the former ice shelf tributaries was 26% higher than before 1996. Along the west coast the average flow speeds of the glaciers increased by 41%. However, the glaciers on the western Antarctic Peninsula revealed a strong spatial variability of the changes in ice dynamics. By applying a hierarchical cluster analysis, we show that this is associated with the geometric parameters of the individual glacier basins (hypsometric indexes, maximum surface elevation of the basin, flux gate to catchment size ratio). The heterogeneous spatial pattern of ice dynamic evolutions at the northern Antarctic Peninsula shows that temporally and spatially detailed observations as well as further monitoring are necessary to fully understand glacier change in regions with such strong topographic and climatic variances. |
format |
Article in Journal/Newspaper |
author |
Seehaus, Thorsten Cook, Alison J. Silva, Aline B. Braun, Matthias |
author_facet |
Seehaus, Thorsten Cook, Alison J. Silva, Aline B. Braun, Matthias |
author_sort |
Seehaus, Thorsten |
title |
Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
title_short |
Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
title_full |
Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
title_fullStr |
Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
title_full_unstemmed |
Changes in glacier dynamics in the northern Antarctic Peninsula since 1985 |
title_sort |
changes in glacier dynamics in the northern antarctic peninsula since 1985 |
publishDate |
2018 |
url |
https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10880 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-108809 https://doi.org/10.5194/tc-12-577-2018 https://opus4.kobv.de/opus4-fau/files/10880/Seehaus_changes.pdf |
long_lat |
ENVELOPE(-58.250,-58.250,-64.200,-64.200) ENVELOPE(-60.255,-60.255,-65.049,-65.049) |
geographic |
Antarctic Antarctic Peninsula Prince Gustav Ice Shelf Seal Nunataks |
geographic_facet |
Antarctic Antarctic Peninsula Prince Gustav Ice Shelf Seal Nunataks |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Prince Gustav Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Shelf Prince Gustav Ice Shelf |
op_relation |
https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10880 urn:nbn:de:bvb:29-opus4-108809 https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-108809 https://doi.org/10.5194/tc-12-577-2018 https://opus4.kobv.de/opus4-fau/files/10880/Seehaus_changes.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-12-577-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
2 |
container_start_page |
577 |
op_container_end_page |
594 |
_version_ |
1766113797492178944 |