A new satellite-derived glacier inventory for western Alaska
Glacier inventories provide the baseline data to perform climate-change impact assessment on a regional scale in a consistent and spatially representative manner. In particular, a more accurate calculation of the current and future contribution to global sea-level rise from heavily glacierized regio...
Published in: | Annals of Glaciology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-new-satellitederived-glacier-inventory-for-western-alaska(fa2dbb79-c1b3-43a7-905c-1f94ee4a7fc4).html https://doi.org/10.3189/172756411799096303 http://www.scopus.com/inward/record.url?scp=84856504998&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/fa2dbb79-c1b3-43a7-905c-1f94ee4a7fc4 2023-05-15T13:29:23+02:00 A new satellite-derived glacier inventory for western Alaska Bris, R. Le Paul, F. Frey, H. Bolch, T. 2011-12-01 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-new-satellitederived-glacier-inventory-for-western-alaska(fa2dbb79-c1b3-43a7-905c-1f94ee4a7fc4).html https://doi.org/10.3189/172756411799096303 http://www.scopus.com/inward/record.url?scp=84856504998&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Bris , R L , Paul , F , Frey , H & Bolch , T 2011 , ' A new satellite-derived glacier inventory for western Alaska ' , Annals of Glaciology , vol. 52 , no. 59 , pp. 135-143 . https://doi.org/10.3189/172756411799096303 article 2011 ftunstandrewcris https://doi.org/10.3189/172756411799096303 2022-06-02T07:49:58Z Glacier inventories provide the baseline data to perform climate-change impact assessment on a regional scale in a consistent and spatially representative manner. In particular, a more accurate calculation of the current and future contribution to global sea-level rise from heavily glacierized regions such as Alaska is much needed. We present a new glacier inventory for a large part of western Alaska (including Kenai Peninsula and the Tordrillo, Chigmit and Chugach mountains), derived from nine Landsat Thematic Mapper scenes acquired between 2005 and 2009 using well-established automated glacier-mapping techniques (band ratio). Because many glaciers are covered by optically thick debris or volcanic ash and partly calve intowater, outlineswere manually edited in these wrongly classified regions during post-processing. In total we mapped ~8830 glaciers (>0.02 km 2 ) with a total area of ~16 250 km 2 . Large parts of the area (47%) are covered by a few (31) large (>100 km 2 ) glaciers, while glaciers less than 1km 2 constitute only 7.5% of the total area but 86% of the total number.We found a strong dependence of mean glacier elevation on distance from the ocean and only aweak one on aspect. Glacier area changes were calculated for a subset of 347 selected glaciers by comparison with the Digital Line Graph outlines from the US Geological Survey. The overall shrinkage was ~23% between 1948-57 and 2005-09. Article in Journal/Newspaper Annals of Glaciology glacier glaciers Alaska University of St Andrews: Research Portal New Glacier ENVELOPE(162.400,162.400,-77.033,-77.033) Annals of Glaciology 52 59 135 143 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
Glacier inventories provide the baseline data to perform climate-change impact assessment on a regional scale in a consistent and spatially representative manner. In particular, a more accurate calculation of the current and future contribution to global sea-level rise from heavily glacierized regions such as Alaska is much needed. We present a new glacier inventory for a large part of western Alaska (including Kenai Peninsula and the Tordrillo, Chigmit and Chugach mountains), derived from nine Landsat Thematic Mapper scenes acquired between 2005 and 2009 using well-established automated glacier-mapping techniques (band ratio). Because many glaciers are covered by optically thick debris or volcanic ash and partly calve intowater, outlineswere manually edited in these wrongly classified regions during post-processing. In total we mapped ~8830 glaciers (>0.02 km 2 ) with a total area of ~16 250 km 2 . Large parts of the area (47%) are covered by a few (31) large (>100 km 2 ) glaciers, while glaciers less than 1km 2 constitute only 7.5% of the total area but 86% of the total number.We found a strong dependence of mean glacier elevation on distance from the ocean and only aweak one on aspect. Glacier area changes were calculated for a subset of 347 selected glaciers by comparison with the Digital Line Graph outlines from the US Geological Survey. The overall shrinkage was ~23% between 1948-57 and 2005-09. |
format |
Article in Journal/Newspaper |
author |
Bris, R. Le Paul, F. Frey, H. Bolch, T. |
spellingShingle |
Bris, R. Le Paul, F. Frey, H. Bolch, T. A new satellite-derived glacier inventory for western Alaska |
author_facet |
Bris, R. Le Paul, F. Frey, H. Bolch, T. |
author_sort |
Bris, R. Le |
title |
A new satellite-derived glacier inventory for western Alaska |
title_short |
A new satellite-derived glacier inventory for western Alaska |
title_full |
A new satellite-derived glacier inventory for western Alaska |
title_fullStr |
A new satellite-derived glacier inventory for western Alaska |
title_full_unstemmed |
A new satellite-derived glacier inventory for western Alaska |
title_sort |
new satellite-derived glacier inventory for western alaska |
publishDate |
2011 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/a-new-satellitederived-glacier-inventory-for-western-alaska(fa2dbb79-c1b3-43a7-905c-1f94ee4a7fc4).html https://doi.org/10.3189/172756411799096303 http://www.scopus.com/inward/record.url?scp=84856504998&partnerID=8YFLogxK |
long_lat |
ENVELOPE(162.400,162.400,-77.033,-77.033) |
geographic |
New Glacier |
geographic_facet |
New Glacier |
genre |
Annals of Glaciology glacier glaciers Alaska |
genre_facet |
Annals of Glaciology glacier glaciers Alaska |
op_source |
Bris , R L , Paul , F , Frey , H & Bolch , T 2011 , ' A new satellite-derived glacier inventory for western Alaska ' , Annals of Glaciology , vol. 52 , no. 59 , pp. 135-143 . https://doi.org/10.3189/172756411799096303 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/172756411799096303 |
container_title |
Annals of Glaciology |
container_volume |
52 |
container_issue |
59 |
container_start_page |
135 |
op_container_end_page |
143 |
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1766000338037374976 |