Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements
Knowledge of sea-ice thickness and volume depends on freeboard observations from satellite altimeters and in turn on information of snow mass and sea-ice density required for the freeboard-to-thickness conversion. These parameters, especially sea-ice density, are usually based on climatologies const...
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Copernicus Publications
2022
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00059992 2023-05-15T15:00:31+02:00 Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements Jutila, Arttu Hendricks, Stefan Ricker, Robert von Albedyll, Luisa Krumpen, Thomas Haas, Christian 2022-01 electronic https://doi.org/10.5194/tc-16-259-2022 https://noa.gwlb.de/receive/cop_mods_00059992 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059641/tc-16-259-2022.pdf https://tc.copernicus.org/articles/16/259/2022/tc-16-259-2022.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-259-2022 https://noa.gwlb.de/receive/cop_mods_00059992 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059641/tc-16-259-2022.pdf https://tc.copernicus.org/articles/16/259/2022/tc-16-259-2022.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2022 ftnonlinearchiv https://doi.org/10.5194/tc-16-259-2022 2022-02-08T22:32:20Z Knowledge of sea-ice thickness and volume depends on freeboard observations from satellite altimeters and in turn on information of snow mass and sea-ice density required for the freeboard-to-thickness conversion. These parameters, especially sea-ice density, are usually based on climatologies constructed from in situ observations made in the 1980s and earlier while contemporary and representative measurements are lacking. Our aim with this paper is to derive updated sea-ice bulk density estimates suitable for the present Arctic sea-ice cover and a range of ice types to reduce uncertainties in sea-ice thickness remote sensing. Our sea-ice density measurements are based on over 3000 km of high-resolution collocated airborne sea-ice and snow thickness and freeboard measurements in the western Arctic Ocean in 2017 and 2019. Sea-ice bulk density is derived assuming isostatic equilibrium for different ice types. Our results show higher average bulk densities for both first-year ice (FYI) and especially multi-year ice (MYI) compared to previous studies. In addition, we find a small difference between deformed and possibly unconsolidated FYI and younger MYI. We find a negative-exponential relationship between sea-ice bulk density and sea-ice freeboard and apply this parameterisation to one winter of monthly gridded CryoSat-2 sea-ice freeboard data. We discuss the suitability and the impact of the derived FYI and MYI bulk densities for sea-ice thickness retrievals and the uncertainty related to the indirect method of measuring sea-ice bulk density. The results suggest that retrieval algorithms be adapted to changes in sea-ice density and highlight the need of future studies to evaluate the impact of density parameterisation on the full sea-ice thickness data record. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice The Cryosphere Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean The Cryosphere 16 1 259 275 |
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Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Jutila, Arttu Hendricks, Stefan Ricker, Robert von Albedyll, Luisa Krumpen, Thomas Haas, Christian Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
Knowledge of sea-ice thickness and volume depends on freeboard observations from satellite altimeters and in turn on information of snow mass and sea-ice density required for the freeboard-to-thickness conversion. These parameters, especially sea-ice density, are usually based on climatologies constructed from in situ observations made in the 1980s and earlier while contemporary and representative measurements are lacking. Our aim with this paper is to derive updated sea-ice bulk density estimates suitable for the present Arctic sea-ice cover and a range of ice types to reduce uncertainties in sea-ice thickness remote sensing. Our sea-ice density measurements are based on over 3000 km of high-resolution collocated airborne sea-ice and snow thickness and freeboard measurements in the western Arctic Ocean in 2017 and 2019. Sea-ice bulk density is derived assuming isostatic equilibrium for different ice types. Our results show higher average bulk densities for both first-year ice (FYI) and especially multi-year ice (MYI) compared to previous studies. In addition, we find a small difference between deformed and possibly unconsolidated FYI and younger MYI. We find a negative-exponential relationship between sea-ice bulk density and sea-ice freeboard and apply this parameterisation to one winter of monthly gridded CryoSat-2 sea-ice freeboard data. We discuss the suitability and the impact of the derived FYI and MYI bulk densities for sea-ice thickness retrievals and the uncertainty related to the indirect method of measuring sea-ice bulk density. The results suggest that retrieval algorithms be adapted to changes in sea-ice density and highlight the need of future studies to evaluate the impact of density parameterisation on the full sea-ice thickness data record. |
format |
Article in Journal/Newspaper |
author |
Jutila, Arttu Hendricks, Stefan Ricker, Robert von Albedyll, Luisa Krumpen, Thomas Haas, Christian |
author_facet |
Jutila, Arttu Hendricks, Stefan Ricker, Robert von Albedyll, Luisa Krumpen, Thomas Haas, Christian |
author_sort |
Jutila, Arttu |
title |
Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
title_short |
Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
title_full |
Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
title_fullStr |
Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
title_full_unstemmed |
Retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
title_sort |
retrieval and parameterisation of sea-ice bulk density from airborne multi-sensor measurements |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-259-2022 https://noa.gwlb.de/receive/cop_mods_00059992 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059641/tc-16-259-2022.pdf https://tc.copernicus.org/articles/16/259/2022/tc-16-259-2022.pdf |
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_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-16-259-2022 https://noa.gwlb.de/receive/cop_mods_00059992 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00059641/tc-16-259-2022.pdf https://tc.copernicus.org/articles/16/259/2022/tc-16-259-2022.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-259-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
1 |
container_start_page |
259 |
op_container_end_page |
275 |
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1766332607395528704 |