Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry
Recent Arctic warming has led to reduced sea-ice thickness and a more dynamic landfast ice cover with potential widespread consequences for ice users. Here, we develop an approach to assess the small-scale deformation of landfast ice critical to on-ice operations using synthetic aperture radar inter...
Published in: | Cold Regions Science and Technology |
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Online Access: | https://doi.org/10.1016/j.coldregions.2018.02.001 https://research.chalmers.se/en/publication/500954 |
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ftchalmersuniv:oai:research.chalmers.se:500954 2024-10-20T14:06:53+00:00 Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry Dammann, Dyre Oliver Eicken, Hajo Mahoney, Andrew R. Meyer, Franz J. Freymueller, Jeffrey T. Kaufman, Alexander M. 2018 text https://doi.org/10.1016/j.coldregions.2018.02.001 https://research.chalmers.se/en/publication/500954 unknown http://dx.doi.org/10.1016/j.coldregions.2018.02.001 https://research.chalmers.se/en/publication/500954 Geology Physical Geography Geosciences Multidisciplinary Arctic Landfast ice Sea ice Ice dynamics Ice trafficability TerraSAR-X Synthetic aperture radar interferometry Ice roads Ice stability Ice strain Remote sensing ALOS PALSAR 2018 ftchalmersuniv https://doi.org/10.1016/j.coldregions.2018.02.001 2024-10-08T15:50:55Z Recent Arctic warming has led to reduced sea-ice thickness and a more dynamic landfast ice cover with potential widespread consequences for ice users. Here, we develop an approach to assess the small-scale deformation of landfast ice critical to on-ice operations using synthetic aperture radar interferometry (InSAR). InSAR has previously proven successful in determining long-term qualitative climatology of ice deformation around on-ice operations, but is now used to explore its potential for providing quantitative guidance for ice road planning, construction, and maintenance. A validation effort using X-band SAR and high-precision GPS data over Elson Lagoon, Alaska, confirms the ability of InSAR to accurately estimate 3-dimensional sea ice strain values accumulated between SAR image acquisitions, using an inverse model. The inverse model was further applied to L-band InSAR data over the Northstar Island ice road near Prudhoe Bay, Alaska. Assuming an elasto-brittle rheology, the derived strain values yielded a spatial distribution of internal stress consistent with preexisting ice defects and morphology. In several localized regions of the study area, stress values exceeded expected yield stress. Resulting relative fracture intensity potential was shown to conform with local knowledge based on road inspections by engineers, and may be used to guide ice road planning, construction and maintenance efforts. The results presented here demonstrate that InSAR is an accurate tool for estimating landfast ice deformation and stability in support of ice use. The findings may also provide substantial new insights into the mechanics of landfast ice. Other/Unknown Material Arctic Prudhoe Bay Sea ice Alaska Chalmers University of Technology: Chalmers research Arctic Northstar Island ENVELOPE(-67.101,-67.101,-68.189,-68.189) Cold Regions Science and Technology 149 51 64 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Geology Physical Geography Geosciences Multidisciplinary Arctic Landfast ice Sea ice Ice dynamics Ice trafficability TerraSAR-X Synthetic aperture radar interferometry Ice roads Ice stability Ice strain Remote sensing ALOS PALSAR |
spellingShingle |
Geology Physical Geography Geosciences Multidisciplinary Arctic Landfast ice Sea ice Ice dynamics Ice trafficability TerraSAR-X Synthetic aperture radar interferometry Ice roads Ice stability Ice strain Remote sensing ALOS PALSAR Dammann, Dyre Oliver Eicken, Hajo Mahoney, Andrew R. Meyer, Franz J. Freymueller, Jeffrey T. Kaufman, Alexander M. Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
topic_facet |
Geology Physical Geography Geosciences Multidisciplinary Arctic Landfast ice Sea ice Ice dynamics Ice trafficability TerraSAR-X Synthetic aperture radar interferometry Ice roads Ice stability Ice strain Remote sensing ALOS PALSAR |
description |
Recent Arctic warming has led to reduced sea-ice thickness and a more dynamic landfast ice cover with potential widespread consequences for ice users. Here, we develop an approach to assess the small-scale deformation of landfast ice critical to on-ice operations using synthetic aperture radar interferometry (InSAR). InSAR has previously proven successful in determining long-term qualitative climatology of ice deformation around on-ice operations, but is now used to explore its potential for providing quantitative guidance for ice road planning, construction, and maintenance. A validation effort using X-band SAR and high-precision GPS data over Elson Lagoon, Alaska, confirms the ability of InSAR to accurately estimate 3-dimensional sea ice strain values accumulated between SAR image acquisitions, using an inverse model. The inverse model was further applied to L-band InSAR data over the Northstar Island ice road near Prudhoe Bay, Alaska. Assuming an elasto-brittle rheology, the derived strain values yielded a spatial distribution of internal stress consistent with preexisting ice defects and morphology. In several localized regions of the study area, stress values exceeded expected yield stress. Resulting relative fracture intensity potential was shown to conform with local knowledge based on road inspections by engineers, and may be used to guide ice road planning, construction and maintenance efforts. The results presented here demonstrate that InSAR is an accurate tool for estimating landfast ice deformation and stability in support of ice use. The findings may also provide substantial new insights into the mechanics of landfast ice. |
author |
Dammann, Dyre Oliver Eicken, Hajo Mahoney, Andrew R. Meyer, Franz J. Freymueller, Jeffrey T. Kaufman, Alexander M. |
author_facet |
Dammann, Dyre Oliver Eicken, Hajo Mahoney, Andrew R. Meyer, Franz J. Freymueller, Jeffrey T. Kaufman, Alexander M. |
author_sort |
Dammann, Dyre Oliver |
title |
Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
title_short |
Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
title_full |
Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
title_fullStr |
Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
title_full_unstemmed |
Evaluating landfast sea ice stress and fracture in support of operations on sea ice using SAR interferometry |
title_sort |
evaluating landfast sea ice stress and fracture in support of operations on sea ice using sar interferometry |
publishDate |
2018 |
url |
https://doi.org/10.1016/j.coldregions.2018.02.001 https://research.chalmers.se/en/publication/500954 |
long_lat |
ENVELOPE(-67.101,-67.101,-68.189,-68.189) |
geographic |
Arctic Northstar Island |
geographic_facet |
Arctic Northstar Island |
genre |
Arctic Prudhoe Bay Sea ice Alaska |
genre_facet |
Arctic Prudhoe Bay Sea ice Alaska |
op_relation |
http://dx.doi.org/10.1016/j.coldregions.2018.02.001 https://research.chalmers.se/en/publication/500954 |
op_doi |
https://doi.org/10.1016/j.coldregions.2018.02.001 |
container_title |
Cold Regions Science and Technology |
container_volume |
149 |
container_start_page |
51 |
op_container_end_page |
64 |
_version_ |
1813445838954823680 |