Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017
We computed circum-Arctic surface velocity maps of glaciers and ice caps over the Canadian Arctic, Svalbard and the Russian Arctic for at least two times between the 1990s and 2017 using satellite SAR data. Our analyses are mainly performed with offset-tracking of ALOS-1 PALSAR-1 (2007–2011) and Sen...
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Online Access: | https://doi.org/10.3390/rs9090947 https://doaj.org/article/03a7a2204a894123bf8b23bb19f4c267 |
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ftdoajarticles:oai:doaj.org/article:03a7a2204a894123bf8b23bb19f4c267 2023-05-15T14:35:34+02:00 Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 Tazio Strozzi Frank Paul Andreas Wiesmann Thomas Schellenberger Andreas Kääb 2017-09-01T00:00:00Z https://doi.org/10.3390/rs9090947 https://doaj.org/article/03a7a2204a894123bf8b23bb19f4c267 EN eng MDPI AG https://www.mdpi.com/2072-4292/9/9/947 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs9090947 https://doaj.org/article/03a7a2204a894123bf8b23bb19f4c267 Remote Sensing, Vol 9, Iss 9, p 947 (2017) Arctic glaciers ice caps flow surge PALSAR-1 Sentinel-1 Science Q article 2017 ftdoajarticles https://doi.org/10.3390/rs9090947 2022-12-31T11:05:49Z We computed circum-Arctic surface velocity maps of glaciers and ice caps over the Canadian Arctic, Svalbard and the Russian Arctic for at least two times between the 1990s and 2017 using satellite SAR data. Our analyses are mainly performed with offset-tracking of ALOS-1 PALSAR-1 (2007–2011) and Sentinel-1 (2015–2017) data. In certain cases JERS-1 SAR (1994–1998), TerraSAR-X (2008–2012), Radarsat-2 (2009–2016) and ALOS-2 PALSAR-2 (2015–2016) data were used to fill-in spatial or temporal gaps. Validation of the latest Sentinel-1 results was accomplished by means of SAR data at higher spatial resolution (Radarsat-2 Wide Ultra Fine) and ground-based measurements. In general, we observe a deceleration of flow velocities for the major tidewater glaciers in the Canadian Arctic and an increase in frontal velocity along with a retreat of frontal positions over Svalbard and the Russian Arctic. However, all regions have strong accelerations for selected glaciers. The latter developments can be well traced based on the very high temporal sampling of Sentinel-1 acquisitions since 2015, revealing new insights in glacier dynamics. For example, surges on Spitsbergen (e.g., Negribreen, Nathorsbreen, Penckbreen and Strongbreen) have a different characteristic and timing than those over Eastern Austfonna and Edgeoya (e.g., Basin 3, Basin 2 and Stonebreen). Events similar to those ongoing on Eastern Austofonna were also observed over the Vavilov Ice Cap on Severnaya Zemlya and possibly Simony Glacier on Franz-Josef Land. Collectively, there seems to be a recently increasing number of glaciers with frontal destabilization over Eastern Svalbard and the Russian Arctic compared to the 1990s. Article in Journal/Newspaper Arctic Austfonna Franz Josef Land glacier Ice cap Severnaya Zemlya Svalbard Tidewater Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Franz Josef Land ENVELOPE(55.000,55.000,81.000,81.000) Severnaya Zemlya ENVELOPE(98.000,98.000,79.500,79.500) Austfonna ENVELOPE(24.559,24.559,79.835,79.835) Negribreen ENVELOPE(19.150,19.150,78.564,78.564) Stonebreen ENVELOPE(23.960,23.960,77.724,77.724) Penckbreen ENVELOPE(15.651,15.651,77.464,77.464) Strongbreen ENVELOPE(17.667,17.667,77.533,77.533) Remote Sensing 9 9 947 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciers ice caps flow surge PALSAR-1 Sentinel-1 Science Q |
spellingShingle |
Arctic glaciers ice caps flow surge PALSAR-1 Sentinel-1 Science Q Tazio Strozzi Frank Paul Andreas Wiesmann Thomas Schellenberger Andreas Kääb Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
topic_facet |
Arctic glaciers ice caps flow surge PALSAR-1 Sentinel-1 Science Q |
description |
We computed circum-Arctic surface velocity maps of glaciers and ice caps over the Canadian Arctic, Svalbard and the Russian Arctic for at least two times between the 1990s and 2017 using satellite SAR data. Our analyses are mainly performed with offset-tracking of ALOS-1 PALSAR-1 (2007–2011) and Sentinel-1 (2015–2017) data. In certain cases JERS-1 SAR (1994–1998), TerraSAR-X (2008–2012), Radarsat-2 (2009–2016) and ALOS-2 PALSAR-2 (2015–2016) data were used to fill-in spatial or temporal gaps. Validation of the latest Sentinel-1 results was accomplished by means of SAR data at higher spatial resolution (Radarsat-2 Wide Ultra Fine) and ground-based measurements. In general, we observe a deceleration of flow velocities for the major tidewater glaciers in the Canadian Arctic and an increase in frontal velocity along with a retreat of frontal positions over Svalbard and the Russian Arctic. However, all regions have strong accelerations for selected glaciers. The latter developments can be well traced based on the very high temporal sampling of Sentinel-1 acquisitions since 2015, revealing new insights in glacier dynamics. For example, surges on Spitsbergen (e.g., Negribreen, Nathorsbreen, Penckbreen and Strongbreen) have a different characteristic and timing than those over Eastern Austfonna and Edgeoya (e.g., Basin 3, Basin 2 and Stonebreen). Events similar to those ongoing on Eastern Austofonna were also observed over the Vavilov Ice Cap on Severnaya Zemlya and possibly Simony Glacier on Franz-Josef Land. Collectively, there seems to be a recently increasing number of glaciers with frontal destabilization over Eastern Svalbard and the Russian Arctic compared to the 1990s. |
format |
Article in Journal/Newspaper |
author |
Tazio Strozzi Frank Paul Andreas Wiesmann Thomas Schellenberger Andreas Kääb |
author_facet |
Tazio Strozzi Frank Paul Andreas Wiesmann Thomas Schellenberger Andreas Kääb |
author_sort |
Tazio Strozzi |
title |
Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
title_short |
Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
title_full |
Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
title_fullStr |
Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
title_full_unstemmed |
Circum-Arctic Changes in the Flow of Glaciers and Ice Caps from Satellite SAR Data between the 1990s and 2017 |
title_sort |
circum-arctic changes in the flow of glaciers and ice caps from satellite sar data between the 1990s and 2017 |
publisher |
MDPI AG |
publishDate |
2017 |
url |
https://doi.org/10.3390/rs9090947 https://doaj.org/article/03a7a2204a894123bf8b23bb19f4c267 |
long_lat |
ENVELOPE(55.000,55.000,81.000,81.000) ENVELOPE(98.000,98.000,79.500,79.500) ENVELOPE(24.559,24.559,79.835,79.835) ENVELOPE(19.150,19.150,78.564,78.564) ENVELOPE(23.960,23.960,77.724,77.724) ENVELOPE(15.651,15.651,77.464,77.464) ENVELOPE(17.667,17.667,77.533,77.533) |
geographic |
Arctic Svalbard Franz Josef Land Severnaya Zemlya Austfonna Negribreen Stonebreen Penckbreen Strongbreen |
geographic_facet |
Arctic Svalbard Franz Josef Land Severnaya Zemlya Austfonna Negribreen Stonebreen Penckbreen Strongbreen |
genre |
Arctic Austfonna Franz Josef Land glacier Ice cap Severnaya Zemlya Svalbard Tidewater Spitsbergen |
genre_facet |
Arctic Austfonna Franz Josef Land glacier Ice cap Severnaya Zemlya Svalbard Tidewater Spitsbergen |
op_source |
Remote Sensing, Vol 9, Iss 9, p 947 (2017) |
op_relation |
https://www.mdpi.com/2072-4292/9/9/947 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs9090947 https://doaj.org/article/03a7a2204a894123bf8b23bb19f4c267 |
op_doi |
https://doi.org/10.3390/rs9090947 |
container_title |
Remote Sensing |
container_volume |
9 |
container_issue |
9 |
container_start_page |
947 |
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1766308372089405440 |