Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data
Although satellite data are useful for obtaining ice-thickness distribution for perennial sea ice or in stable thin-sea-ice areas, they are still largely an unresolved issue for the seasonal ice zone (SIZ). We address this problem using L-band synthetic aperture radar (SAR). In the SIZ, ice-thicknes...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/47349 2023-05-15T13:29:12+02:00 Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data Toyota, Takenobu Ono, Shuji Cho, Kohei Ohshima, Kay I. http://hdl.handle.net/2115/47349 https://doi.org/10.3189/172756411795931732 eng eng International Glaciological Society http://www.igsoc.org/ http://hdl.handle.net/2115/47349 Annals of Glaciology, 52(57): 177-184 http://dx.doi.org/10.3189/172756411795931732 © 2011 International Glaciological Society 452 article fthokunivhus https://doi.org/10.3189/172756411795931732 2022-11-18T01:02:09Z Although satellite data are useful for obtaining ice-thickness distribution for perennial sea ice or in stable thin-sea-ice areas, they are still largely an unresolved issue for the seasonal ice zone (SIZ). We address this problem using L-band synthetic aperture radar (SAR). In the SIZ, ice-thickness growth is closely related to deformation, so surface roughness is expected to correlate with ice thickness. L-band SAR, suitable for detecting such surface roughness, is a promising tool for obtaining thickness distribution. This idea was supported by an airborne polarimetric and interferometric SAR (Pi-SAR) validation. To extend this result to spaceborne L-band SAR with coarser resolution, we conducted in situ measurements of ice thickness and surface roughness in February 2008 in the southern Sea of Okhotsk with an icebreaker in coordination with the Advanced Land Observing Satellite (ALOS)/Phased Array-type L-band SAR (PALSAR) orbit. A helicopter-borne laser profiler was used to improve the estimation of surface. roughness. It was found that backscatter coefficients (HH) correlated well with ice thickness (R=0.86) and surface roughness (R=0.70), which confirms the possibility of determining ice-thickness distribution in the SIZ. The interannual variation of PALSAR-derived ice-thickness distribution in the southern Sea of Okhotsk is also discussed. Article in Journal/Newspaper Annals of Glaciology Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Okhotsk Annals of Glaciology 52 57 177 184 |
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Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Toyota, Takenobu Ono, Shuji Cho, Kohei Ohshima, Kay I. Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
topic_facet |
452 |
description |
Although satellite data are useful for obtaining ice-thickness distribution for perennial sea ice or in stable thin-sea-ice areas, they are still largely an unresolved issue for the seasonal ice zone (SIZ). We address this problem using L-band synthetic aperture radar (SAR). In the SIZ, ice-thickness growth is closely related to deformation, so surface roughness is expected to correlate with ice thickness. L-band SAR, suitable for detecting such surface roughness, is a promising tool for obtaining thickness distribution. This idea was supported by an airborne polarimetric and interferometric SAR (Pi-SAR) validation. To extend this result to spaceborne L-band SAR with coarser resolution, we conducted in situ measurements of ice thickness and surface roughness in February 2008 in the southern Sea of Okhotsk with an icebreaker in coordination with the Advanced Land Observing Satellite (ALOS)/Phased Array-type L-band SAR (PALSAR) orbit. A helicopter-borne laser profiler was used to improve the estimation of surface. roughness. It was found that backscatter coefficients (HH) correlated well with ice thickness (R=0.86) and surface roughness (R=0.70), which confirms the possibility of determining ice-thickness distribution in the SIZ. The interannual variation of PALSAR-derived ice-thickness distribution in the southern Sea of Okhotsk is also discussed. |
format |
Article in Journal/Newspaper |
author |
Toyota, Takenobu Ono, Shuji Cho, Kohei Ohshima, Kay I. |
author_facet |
Toyota, Takenobu Ono, Shuji Cho, Kohei Ohshima, Kay I. |
author_sort |
Toyota, Takenobu |
title |
Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
title_short |
Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
title_full |
Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
title_fullStr |
Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
title_full_unstemmed |
Retrieval of sea-ice thickness distribution in the Sea of Okhotsk from ALOS/PALSAR backscatter data |
title_sort |
retrieval of sea-ice thickness distribution in the sea of okhotsk from alos/palsar backscatter data |
publisher |
International Glaciological Society |
url |
http://hdl.handle.net/2115/47349 https://doi.org/10.3189/172756411795931732 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Annals of Glaciology Sea ice |
genre_facet |
Annals of Glaciology Sea ice |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/47349 Annals of Glaciology, 52(57): 177-184 http://dx.doi.org/10.3189/172756411795931732 |
op_rights |
© 2011 International Glaciological Society |
op_doi |
https://doi.org/10.3189/172756411795931732 |
container_title |
Annals of Glaciology |
container_volume |
52 |
container_issue |
57 |
container_start_page |
177 |
op_container_end_page |
184 |
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1765999219604193280 |