Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images
Sub-meter resolution, stereoscopic satellite images allow for the generation of accurate and high-resolution digital elevation models (DEMs) over glaciers and ice caps. Here, repeated stereo images of Drangajökull ice cap (NW Iceland) from Pléiades and WorldView2 (WV2) are combined with in situ esti...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus GmbH
2017
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.11815/369 https://doi.org/10.5194/tc-11-1501-2017 |
id |
ftopinvisindi:oai:opinvisindi.is:20.500.11815/369 |
---|---|
record_format |
openpolar |
spelling |
ftopinvisindi:oai:opinvisindi.is:20.500.11815/369 2023-05-15T16:02:36+02:00 Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images Belart, Joaquín M. C. Berthier, Etienne Magnússon, Eyjólfur Anderson, Leif S. Pálsson, Finnur Þorsteinsson, Þorsteinn Howat, Ian M. Adalgeirsdottir, Gudfinna Jóhannesson, Tómas Jarosch, Alexander H. Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2017-06-30 1501-1517 https://hdl.handle.net/20.500.11815/369 https://doi.org/10.5194/tc-11-1501-2017 en eng Copernicus GmbH The Cryosphere;11(3) https://www.the-cryosphere.net/11/1501/2017/tc-11-1501-2017.pdf Belart, J. M. C., Berthier, E., Magnússon, E., Anderson, L. S., Pálsson, F., Thorsteinsson, T., Howat, I. M., Aðalgeirsdóttir, G., Jóhannesson, T., and Jarosch, A. H.: Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images, The Cryosphere, 11, 1501-1517, https://doi.org/10.5194/tc-11-1501-2017, 2017 1994-0416 1994-0424 (eISSN) https://hdl.handle.net/20.500.11815/369 The Cryosphere doi:10.5194/tc-11-1501-2017 info:eu-repo/semantics/openAccess Jöklarannsóknir Snjóalög Gervitungl info:eu-repo/semantics/article 2017 ftopinvisindi https://doi.org/20.500.11815/369 https://doi.org/10.5194/tc-11-1501-2017 2022-11-18T06:51:31Z Sub-meter resolution, stereoscopic satellite images allow for the generation of accurate and high-resolution digital elevation models (DEMs) over glaciers and ice caps. Here, repeated stereo images of Drangajökull ice cap (NW Iceland) from Pléiades and WorldView2 (WV2) are combined with in situ estimates of snow density and densification of firn and fresh snow to provide the first estimates of the glacier-wide geodetic winter mass balance obtained from satellite imagery. Statistics in snow- and ice-free areas reveal similar vertical relative accuracy (< 0.5 m) with and without ground control points (GCPs), demonstrating the capability for measuring seasonal snow accumulation. The calculated winter (14 October 2014 to 22 May 2015) mass balance of Drangajökull was 3.33 ± 0.23 m w.e. (meter water equivalent), with ∼ 60 % of the accumulation occurring by February, which is in good agreement with nearby ground observations. On average, the repeated DEMs yield 22 % less elevation change than the length of eight winter snow cores due to (1) the time difference between in situ and satellite observations, (2) firn densification and (3) elevation changes due to ice dynamics. The contributions of these three factors were of similar magnitude. This study demonstrates that seasonal geodetic mass balance can, in many areas, be estimated from sub-meter resolution satellite stereo images. This study was funded by the University of Iceland (UI) Research Fund. Pleiades images were acquired at research price thanks to the CNES ISIS program (http://www.isis-cnes.fr). The WV2 DEM was obtained through the ArcticDEM project. This work is a contribution to the Rannis grant of excellence project, ANATILS. Collaboration and travels between IES and LEGOS were funded by the Jules Verne research fund and the TOSCA program from the French Space Agency, CNES. This study used the recent lidar mapping of the glaciers in Iceland that was funded by the Icelandic Research Fund, the Landsvirkjun research fund, the Icelandic Road ... Article in Journal/Newspaper Drangajökull glacier Ice cap Iceland The Cryosphere Opin vísindi (Iceland) Drangajökull ENVELOPE(-22.239,-22.239,66.164,66.164) Jules ENVELOPE(140.917,140.917,-66.742,-66.742) Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Verne ENVELOPE(-67.550,-67.550,-67.750,-67.750) The Cryosphere 11 3 1501 1517 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Jöklarannsóknir Snjóalög Gervitungl |
spellingShingle |
Jöklarannsóknir Snjóalög Gervitungl Belart, Joaquín M. C. Berthier, Etienne Magnússon, Eyjólfur Anderson, Leif S. Pálsson, Finnur Þorsteinsson, Þorsteinn Howat, Ian M. Adalgeirsdottir, Gudfinna Jóhannesson, Tómas Jarosch, Alexander H. Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
topic_facet |
Jöklarannsóknir Snjóalög Gervitungl |
description |
Sub-meter resolution, stereoscopic satellite images allow for the generation of accurate and high-resolution digital elevation models (DEMs) over glaciers and ice caps. Here, repeated stereo images of Drangajökull ice cap (NW Iceland) from Pléiades and WorldView2 (WV2) are combined with in situ estimates of snow density and densification of firn and fresh snow to provide the first estimates of the glacier-wide geodetic winter mass balance obtained from satellite imagery. Statistics in snow- and ice-free areas reveal similar vertical relative accuracy (< 0.5 m) with and without ground control points (GCPs), demonstrating the capability for measuring seasonal snow accumulation. The calculated winter (14 October 2014 to 22 May 2015) mass balance of Drangajökull was 3.33 ± 0.23 m w.e. (meter water equivalent), with ∼ 60 % of the accumulation occurring by February, which is in good agreement with nearby ground observations. On average, the repeated DEMs yield 22 % less elevation change than the length of eight winter snow cores due to (1) the time difference between in situ and satellite observations, (2) firn densification and (3) elevation changes due to ice dynamics. The contributions of these three factors were of similar magnitude. This study demonstrates that seasonal geodetic mass balance can, in many areas, be estimated from sub-meter resolution satellite stereo images. This study was funded by the University of Iceland (UI) Research Fund. Pleiades images were acquired at research price thanks to the CNES ISIS program (http://www.isis-cnes.fr). The WV2 DEM was obtained through the ArcticDEM project. This work is a contribution to the Rannis grant of excellence project, ANATILS. Collaboration and travels between IES and LEGOS were funded by the Jules Verne research fund and the TOSCA program from the French Space Agency, CNES. This study used the recent lidar mapping of the glaciers in Iceland that was funded by the Icelandic Research Fund, the Landsvirkjun research fund, the Icelandic Road ... |
author2 |
Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Belart, Joaquín M. C. Berthier, Etienne Magnússon, Eyjólfur Anderson, Leif S. Pálsson, Finnur Þorsteinsson, Þorsteinn Howat, Ian M. Adalgeirsdottir, Gudfinna Jóhannesson, Tómas Jarosch, Alexander H. |
author_facet |
Belart, Joaquín M. C. Berthier, Etienne Magnússon, Eyjólfur Anderson, Leif S. Pálsson, Finnur Þorsteinsson, Þorsteinn Howat, Ian M. Adalgeirsdottir, Gudfinna Jóhannesson, Tómas Jarosch, Alexander H. |
author_sort |
Belart, Joaquín M. C. |
title |
Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
title_short |
Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
title_full |
Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
title_fullStr |
Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
title_full_unstemmed |
Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images |
title_sort |
winter mass balance of drangajökull ice cap (nw iceland) derived from satellite sub-meter stereo images |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11815/369 https://doi.org/10.5194/tc-11-1501-2017 |
long_lat |
ENVELOPE(-22.239,-22.239,66.164,66.164) ENVELOPE(140.917,140.917,-66.742,-66.742) ENVELOPE(165.533,165.533,-72.700,-72.700) ENVELOPE(-67.550,-67.550,-67.750,-67.750) |
geographic |
Drangajökull Jules Pleiades Verne |
geographic_facet |
Drangajökull Jules Pleiades Verne |
genre |
Drangajökull glacier Ice cap Iceland The Cryosphere |
genre_facet |
Drangajökull glacier Ice cap Iceland The Cryosphere |
op_relation |
The Cryosphere;11(3) https://www.the-cryosphere.net/11/1501/2017/tc-11-1501-2017.pdf Belart, J. M. C., Berthier, E., Magnússon, E., Anderson, L. S., Pálsson, F., Thorsteinsson, T., Howat, I. M., Aðalgeirsdóttir, G., Jóhannesson, T., and Jarosch, A. H.: Winter mass balance of Drangajökull ice cap (NW Iceland) derived from satellite sub-meter stereo images, The Cryosphere, 11, 1501-1517, https://doi.org/10.5194/tc-11-1501-2017, 2017 1994-0416 1994-0424 (eISSN) https://hdl.handle.net/20.500.11815/369 The Cryosphere doi:10.5194/tc-11-1501-2017 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/369 https://doi.org/10.5194/tc-11-1501-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1501 |
op_container_end_page |
1517 |
_version_ |
1766398267993620480 |