Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability
We estimate the uncertainty of satellite‐retrieved Arctic sea‐ice thickness, sea‐ice volume, and their trends stemming from the lack of reliable snow‐thickness observations. To do so, we simulate a Cryosat2‐type ice‐thickness retrieval in an ocean‐model simulation forced by atmospheric reanalysis, p...
Published in: | Geophysical Research Letters |
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Online Access: | https://orbit.dtu.dk/en/publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 https://doi.org/10.1029/2018GL078867 https://backend.orbit.dtu.dk/ws/files/162062390/Bunzel_et_al_2018_Geophysical_Research_Letters.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 2024-09-09T19:14:57+00:00 Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability Bunzel, Felix Notz, Dirk Pedersen, Leif Toudal 2018 application/pdf https://orbit.dtu.dk/en/publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 https://doi.org/10.1029/2018GL078867 https://backend.orbit.dtu.dk/ws/files/162062390/Bunzel_et_al_2018_Geophysical_Research_Letters.pdf eng eng https://orbit.dtu.dk/en/publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 info:eu-repo/semantics/openAccess Bunzel , F , Notz , D & Pedersen , L T 2018 , ' Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability ' , Geophysical Research Letters , vol. 45 , no. 21 , pp. 11,751-11,759 . https://doi.org/10.1029/2018GL078867 article 2018 ftdtupubl https://doi.org/10.1029/2018GL078867 2024-08-05T23:48:29Z We estimate the uncertainty of satellite‐retrieved Arctic sea‐ice thickness, sea‐ice volume, and their trends stemming from the lack of reliable snow‐thickness observations. To do so, we simulate a Cryosat2‐type ice‐thickness retrieval in an ocean‐model simulation forced by atmospheric reanalysis, pretending that only freeboard is known as model output. We then convert freeboard to sea‐ice thickness using different snow climatologies and compare the resulting sea‐ice thickness retrievals to each other and to the real sea‐ice thickness of the reanalysis‐forced simulation. We find that different snow climatologies cause significant differences in the obtained ice thickness and ice volume. In addition, we show that Arctic ice‐volume trends derived from ice‐thickness retrievals using any snow‐depth climatology are highly unreliable because the estimated trend in ice volume can strongly be influenced by the neglected interannual variability in snow volume. Article in Journal/Newspaper Arctic Arctic Sea ice Technical University of Denmark: DTU Orbit Arctic Geophysical Research Letters 45 21 11,751 11,759 |
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Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
We estimate the uncertainty of satellite‐retrieved Arctic sea‐ice thickness, sea‐ice volume, and their trends stemming from the lack of reliable snow‐thickness observations. To do so, we simulate a Cryosat2‐type ice‐thickness retrieval in an ocean‐model simulation forced by atmospheric reanalysis, pretending that only freeboard is known as model output. We then convert freeboard to sea‐ice thickness using different snow climatologies and compare the resulting sea‐ice thickness retrievals to each other and to the real sea‐ice thickness of the reanalysis‐forced simulation. We find that different snow climatologies cause significant differences in the obtained ice thickness and ice volume. In addition, we show that Arctic ice‐volume trends derived from ice‐thickness retrievals using any snow‐depth climatology are highly unreliable because the estimated trend in ice volume can strongly be influenced by the neglected interannual variability in snow volume. |
format |
Article in Journal/Newspaper |
author |
Bunzel, Felix Notz, Dirk Pedersen, Leif Toudal |
spellingShingle |
Bunzel, Felix Notz, Dirk Pedersen, Leif Toudal Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
author_facet |
Bunzel, Felix Notz, Dirk Pedersen, Leif Toudal |
author_sort |
Bunzel, Felix |
title |
Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
title_short |
Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
title_full |
Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
title_fullStr |
Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
title_full_unstemmed |
Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability |
title_sort |
retrievals of arctic sea-ice volume and its trend significantly affected by interannual snow variability |
publishDate |
2018 |
url |
https://orbit.dtu.dk/en/publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 https://doi.org/10.1029/2018GL078867 https://backend.orbit.dtu.dk/ws/files/162062390/Bunzel_et_al_2018_Geophysical_Research_Letters.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Sea ice |
genre_facet |
Arctic Arctic Sea ice |
op_source |
Bunzel , F , Notz , D & Pedersen , L T 2018 , ' Retrievals of Arctic Sea-Ice Volume and Its Trend Significantly Affected by Interannual Snow Variability ' , Geophysical Research Letters , vol. 45 , no. 21 , pp. 11,751-11,759 . https://doi.org/10.1029/2018GL078867 |
op_relation |
https://orbit.dtu.dk/en/publications/c6363334-3d94-4409-a6f2-e62f8e2a3304 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018GL078867 |
container_title |
Geophysical Research Letters |
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45 |
container_issue |
21 |
container_start_page |
11,751 |
op_container_end_page |
11,759 |
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1809755111552974848 |