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...
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International Glaciological Society
2011
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ftunivzuerich:oai:www.zora.uzh.ch:53434 2024-06-23T07:45:37+00:00 A new satellite-derived glacier inventory for western Alaska Le Bris, R Paul, F Frey, H Bolch, T 2011 application/pdf https://www.zora.uzh.ch/id/eprint/53434/ https://www.zora.uzh.ch/id/eprint/53434/1/2011_PaulF_a59A046.pdf http://www.igsoc.org/annals/v52/59/a59A046.pdf https://doi.org/10.5167/uzh-53434 https://doi.org/10.3189/172756411799096303 eng eng International Glaciological Society https://www.zora.uzh.ch/id/eprint/53434/1/2011_PaulF_a59A046.pdf doi:10.5167/uzh-53434 doi:10.3189/172756411799096303 urn:issn:0260-3055 info:eu-repo/semantics/openAccess Le Bris, R; Paul, F; Frey, H; Bolch, T (2011). A new satellite-derived glacier inventory for western Alaska. Annals of Glaciology, 52(59):135-143. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftunivzuerich https://doi.org/10.5167/uzh-5343410.3189/172756411799096303 2024-06-12T00:19:23Z 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 into water, outlines were manually edited in these wrongly classified regions during post-processing. In total we mapped ∼8830 glaciers (>0.02 km2) with a total area of ∼16 250 km2. Large parts of the area (47%) are covered by a few (31) large (>100 km2) glaciers, while glaciers less than 1 km2 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 a weak 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 Zurich (UZH): ZORA (Zurich Open Repository and Archive New Glacier ENVELOPE(162.400,162.400,-77.033,-77.033) |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel Le Bris, R Paul, F Frey, H Bolch, T A new satellite-derived glacier inventory for western Alaska |
topic_facet |
Institute of Geography 910 Geography & travel |
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 into water, outlines were manually edited in these wrongly classified regions during post-processing. In total we mapped ∼8830 glaciers (>0.02 km2) with a total area of ∼16 250 km2. Large parts of the area (47%) are covered by a few (31) large (>100 km2) glaciers, while glaciers less than 1 km2 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 a weak 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 |
Le Bris, R Paul, F Frey, H Bolch, T |
author_facet |
Le Bris, R Paul, F Frey, H Bolch, T |
author_sort |
Le Bris, R |
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 |
publisher |
International Glaciological Society |
publishDate |
2011 |
url |
https://www.zora.uzh.ch/id/eprint/53434/ https://www.zora.uzh.ch/id/eprint/53434/1/2011_PaulF_a59A046.pdf http://www.igsoc.org/annals/v52/59/a59A046.pdf https://doi.org/10.5167/uzh-53434 https://doi.org/10.3189/172756411799096303 |
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 |
Le Bris, R; Paul, F; Frey, H; Bolch, T (2011). A new satellite-derived glacier inventory for western Alaska. Annals of Glaciology, 52(59):135-143. |
op_relation |
https://www.zora.uzh.ch/id/eprint/53434/1/2011_PaulF_a59A046.pdf doi:10.5167/uzh-53434 doi:10.3189/172756411799096303 urn:issn:0260-3055 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-5343410.3189/172756411799096303 |
_version_ |
1802641549936295936 |