Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements
A method of simultaneously estimating snow depth and sea ice thickness using satellite-based freeboard measurements over the Arctic Ocean during winter was proposed. The ratio of snow depth to ice thickness (referred to as α) was defined and used in constraining the conversion from the freeboard to...
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Copernicus Publications
2020
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Online Access: | https://doi.org/10.5194/tc-14-3761-2020 https://tc.copernicus.org/articles/14/3761/2020/tc-14-3761-2020.pdf https://doaj.org/article/6a3154fa6f174f55ac11ec07004640c6 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6a3154fa6f174f55ac11ec07004640c6 2023-05-15T15:07:02+02:00 Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements H. Shi B.-J. Sohn G. Dybkjær R. T. Tonboe S.-M. Lee 2020-11-01 https://doi.org/10.5194/tc-14-3761-2020 https://tc.copernicus.org/articles/14/3761/2020/tc-14-3761-2020.pdf https://doaj.org/article/6a3154fa6f174f55ac11ec07004640c6 en eng Copernicus Publications doi:10.5194/tc-14-3761-2020 1994-0416 1994-0424 https://tc.copernicus.org/articles/14/3761/2020/tc-14-3761-2020.pdf https://doaj.org/article/6a3154fa6f174f55ac11ec07004640c6 undefined The Cryosphere, Vol 14, Pp 3761-3783 (2020) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/tc-14-3761-2020 2023-01-22T19:33:34Z A method of simultaneously estimating snow depth and sea ice thickness using satellite-based freeboard measurements over the Arctic Ocean during winter was proposed. The ratio of snow depth to ice thickness (referred to as α) was defined and used in constraining the conversion from the freeboard to ice thickness in satellite altimetry without prior knowledge of snow depth. Then α was empirically determined using the ratio of temperature difference of the snow layer to the difference of the ice layer to allow the determination of α from satellite-derived snow surface temperature and snow–ice interface temperature. The proposed method was evaluated against NASA's Operation IceBridge measurements, and results indicated that the algorithm adequately retrieves snow depth and ice thickness simultaneously; retrieved ice thickness was found to be better than the methods relying on the use of snow depth climatology as input in terms of mean bias. The application of the proposed method to CryoSat-2 radar freeboard measurements yields similar results. In conclusion, the developed α-based method has the capacity to derive ice thickness and snow depth without relying on the snow depth information as input for the buoyancy equation or the radar penetration correction for converting freeboard to ice thickness. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice The Cryosphere Unknown Arctic Arctic Ocean The Cryosphere 14 11 3761 3783 |
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English |
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geo envir |
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geo envir H. Shi B.-J. Sohn G. Dybkjær R. T. Tonboe S.-M. Lee Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
topic_facet |
geo envir |
description |
A method of simultaneously estimating snow depth and sea ice thickness using satellite-based freeboard measurements over the Arctic Ocean during winter was proposed. The ratio of snow depth to ice thickness (referred to as α) was defined and used in constraining the conversion from the freeboard to ice thickness in satellite altimetry without prior knowledge of snow depth. Then α was empirically determined using the ratio of temperature difference of the snow layer to the difference of the ice layer to allow the determination of α from satellite-derived snow surface temperature and snow–ice interface temperature. The proposed method was evaluated against NASA's Operation IceBridge measurements, and results indicated that the algorithm adequately retrieves snow depth and ice thickness simultaneously; retrieved ice thickness was found to be better than the methods relying on the use of snow depth climatology as input in terms of mean bias. The application of the proposed method to CryoSat-2 radar freeboard measurements yields similar results. In conclusion, the developed α-based method has the capacity to derive ice thickness and snow depth without relying on the snow depth information as input for the buoyancy equation or the radar penetration correction for converting freeboard to ice thickness. |
format |
Article in Journal/Newspaper |
author |
H. Shi B.-J. Sohn G. Dybkjær R. T. Tonboe S.-M. Lee |
author_facet |
H. Shi B.-J. Sohn G. Dybkjær R. T. Tonboe S.-M. Lee |
author_sort |
H. Shi |
title |
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
title_short |
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
title_full |
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
title_fullStr |
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
title_full_unstemmed |
Simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
title_sort |
simultaneous estimation of wintertime sea ice thickness and snow depth from space-borne freeboard measurements |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-3761-2020 https://tc.copernicus.org/articles/14/3761/2020/tc-14-3761-2020.pdf https://doaj.org/article/6a3154fa6f174f55ac11ec07004640c6 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice The Cryosphere |
genre_facet |
Arctic Arctic Ocean Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 14, Pp 3761-3783 (2020) |
op_relation |
doi:10.5194/tc-14-3761-2020 1994-0416 1994-0424 https://tc.copernicus.org/articles/14/3761/2020/tc-14-3761-2020.pdf https://doaj.org/article/6a3154fa6f174f55ac11ec07004640c6 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-14-3761-2020 |
container_title |
The Cryosphere |
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14 |
container_issue |
11 |
container_start_page |
3761 |
op_container_end_page |
3783 |
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1766338601084256256 |