The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s
International audience A Landsat Thematic Mapper (TM) scene from 2003 covering the Jotunheimen and Breheimen region has been used to map the recent glacier extents using thresholded ratio images (TM3/TM5). Orthoprojected aerial photographs and glacier outlines from digital maps have been used to val...
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ftinsu:oai:HAL:hal-00298542v1 2023-11-12T04:17:31+01:00 The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s Andreassen, L. M. Paul, F. Kääb, A. Hausberg, J. E. Norwegian Water Resources and Energy Directorate (NVE) Department of Geosciences Oslo Faculty of Mathematics and Natural Sciences Oslo University of Oslo (UiO)-University of Oslo (UiO) Department of Geography Department of geography 2008-05-07 https://hal.science/hal-00298542 https://hal.science/hal-00298542/document https://hal.science/hal-00298542/file/tcd-2-299-2008.pdf en eng HAL CCSD Copernicus hal-00298542 https://hal.science/hal-00298542 https://hal.science/hal-00298542/document https://hal.science/hal-00298542/file/tcd-2-299-2008.pdf info:eu-repo/semantics/OpenAccess ISSN: 1994-0432 EISSN: 1994-0440 The Cryosphere Discussions https://hal.science/hal-00298542 The Cryosphere Discussions, 2008, 2 (3), pp.299-339 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2008 ftinsu 2023-10-25T16:27:55Z International audience A Landsat Thematic Mapper (TM) scene from 2003 covering the Jotunheimen and Breheimen region has been used to map the recent glacier extents using thresholded ratio images (TM3/TM5). Orthoprojected aerial photographs and glacier outlines from digital maps have been used to validate the method and control the results. We further calculated glacier changes by comparing the Landsat-derived 2003 glacier outlines with previous maps and inventories from the 1930s, 1960s and 1980s. Our results confirm that the applied automatic mapping method is very robust and agrees precisely with the reference data used. Some manual editing was necessary to correct the outline at ice-lake contacts and at debris covered glaciers. However, for most of the glaciers no corrections were required. The most laborious task has been to assign ID numbers and couple the new Landsat inventory to previous inventories to assess area changes. The glaciers investigated shrank since the 1930s with an overall area reduction of about 23% for 38 glaciers. Since the 1960s the area reduction was 12% for 164 glaciers. Although the general trend is glacier retreat and area reduction, some glaciers have increased their size or remained nearly unchanged over the last decades. Article in Journal/Newspaper glacier The Cryosphere The Cryosphere Discussions Institut national des sciences de l'Univers: HAL-INSU Norway |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Andreassen, L. M. Paul, F. Kääb, A. Hausberg, J. E. The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience A Landsat Thematic Mapper (TM) scene from 2003 covering the Jotunheimen and Breheimen region has been used to map the recent glacier extents using thresholded ratio images (TM3/TM5). Orthoprojected aerial photographs and glacier outlines from digital maps have been used to validate the method and control the results. We further calculated glacier changes by comparing the Landsat-derived 2003 glacier outlines with previous maps and inventories from the 1930s, 1960s and 1980s. Our results confirm that the applied automatic mapping method is very robust and agrees precisely with the reference data used. Some manual editing was necessary to correct the outline at ice-lake contacts and at debris covered glaciers. However, for most of the glaciers no corrections were required. The most laborious task has been to assign ID numbers and couple the new Landsat inventory to previous inventories to assess area changes. The glaciers investigated shrank since the 1930s with an overall area reduction of about 23% for 38 glaciers. Since the 1960s the area reduction was 12% for 164 glaciers. Although the general trend is glacier retreat and area reduction, some glaciers have increased their size or remained nearly unchanged over the last decades. |
author2 |
Norwegian Water Resources and Energy Directorate (NVE) Department of Geosciences Oslo Faculty of Mathematics and Natural Sciences Oslo University of Oslo (UiO)-University of Oslo (UiO) Department of Geography Department of geography |
format |
Article in Journal/Newspaper |
author |
Andreassen, L. M. Paul, F. Kääb, A. Hausberg, J. E. |
author_facet |
Andreassen, L. M. Paul, F. Kääb, A. Hausberg, J. E. |
author_sort |
Andreassen, L. M. |
title |
The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
title_short |
The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
title_full |
The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
title_fullStr |
The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
title_full_unstemmed |
The new Landsat-derived glacier inventory for Jotunheimen, Norway, and deduced glacier changes since the 1930s |
title_sort |
new landsat-derived glacier inventory for jotunheimen, norway, and deduced glacier changes since the 1930s |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.science/hal-00298542 https://hal.science/hal-00298542/document https://hal.science/hal-00298542/file/tcd-2-299-2008.pdf |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier The Cryosphere The Cryosphere Discussions |
genre_facet |
glacier The Cryosphere The Cryosphere Discussions |
op_source |
ISSN: 1994-0432 EISSN: 1994-0440 The Cryosphere Discussions https://hal.science/hal-00298542 The Cryosphere Discussions, 2008, 2 (3), pp.299-339 |
op_relation |
hal-00298542 https://hal.science/hal-00298542 https://hal.science/hal-00298542/document https://hal.science/hal-00298542/file/tcd-2-299-2008.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334380595740672 |