Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation
Size distribution of sea ice floes is an important component for sea ice thermodynamic and dynamic processes, particularly in the marginal ice zone. Recently processes related to the floe size distribution (FSD) have been incorporated into sea ice models, but the sparsity of existing observations li...
Published in: | The Cryosphere |
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Online Access: | https://pure.hud.ac.uk/en/publications/c1bf1012-4f16-4dd2-be49-f0737cf25252 https://doi.org/10.5194/tc-17-3575-2023 http://www.scopus.com/inward/record.url?scp=85172791663&partnerID=8YFLogxK |
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ftuhuddersfieldc:oai:pure.atira.dk:publications/c1bf1012-4f16-4dd2-be49-f0737cf25252 2024-09-15T17:50:39+00:00 Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation Wang, Yanan Hwang, Byongjun (Phil) Bateson, Adam William Aksenov, Yevgeny Horvat, Christopher 2023-08-25 https://pure.hud.ac.uk/en/publications/c1bf1012-4f16-4dd2-be49-f0737cf25252 https://doi.org/10.5194/tc-17-3575-2023 http://www.scopus.com/inward/record.url?scp=85172791663&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Wang , Y , Hwang , B , Bateson , A W , Aksenov , Y & Horvat , C 2023 , ' Summer sea ice floe perimeter density in the Arctic : high-resolution optical satellite imagery and model evaluation ' , Cryosphere , vol. 17 , no. 8 , pp. 3575-3591 . https://doi.org/10.5194/tc-17-3575-2023 article 2023 ftuhuddersfieldc https://doi.org/10.5194/tc-17-3575-2023 2024-08-14T23:31:16Z Size distribution of sea ice floes is an important component for sea ice thermodynamic and dynamic processes, particularly in the marginal ice zone. Recently processes related to the floe size distribution (FSD) have been incorporated into sea ice models, but the sparsity of existing observations limits the evaluation of FSD models, thus hindering model improvements. In this study, perimeter density has been applied to characterise the floe size distribution for evaluating three FSD models – the Waves-in-Ice module and Power law Floe Size Distribution (WIPoFSD) model and two branches of a fully prognostic floe size-thickness distribution model: CPOM-FSD and FSDv2-WAVE. These models are evaluated against a new FSD dataset derived from high-resolution satellite imagery in the Arctic. The evaluation shows an overall overestimation of floe perimeter density by the models against the observations. Comparison of the floe perimeter density distribution with the observations shows that the models exhibit a much larger proportion for small floes (radius 30–50 m). Observations and the WIPoFSD model both show a negative correlation between sea ice concentration and the floe perimeter density, but the two prognostic models (CPOM-FSD and FSDv2-WAVE) show the opposite pattern. These differences between models and the observations may be attributed to limitations in the observations (e.g. the image resolution is not sufficient to detect small floes) or limitations in the model parameterisations, including the use of a global power-law exponent in the WIPoFSD model as well as too weak a floe welding and enhanced wave fracture in the prognostic models. Article in Journal/Newspaper Arctic Sea ice University of Huddersfield Research Portal The Cryosphere 17 8 3575 3591 |
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Open Polar |
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University of Huddersfield Research Portal |
op_collection_id |
ftuhuddersfieldc |
language |
English |
description |
Size distribution of sea ice floes is an important component for sea ice thermodynamic and dynamic processes, particularly in the marginal ice zone. Recently processes related to the floe size distribution (FSD) have been incorporated into sea ice models, but the sparsity of existing observations limits the evaluation of FSD models, thus hindering model improvements. In this study, perimeter density has been applied to characterise the floe size distribution for evaluating three FSD models – the Waves-in-Ice module and Power law Floe Size Distribution (WIPoFSD) model and two branches of a fully prognostic floe size-thickness distribution model: CPOM-FSD and FSDv2-WAVE. These models are evaluated against a new FSD dataset derived from high-resolution satellite imagery in the Arctic. The evaluation shows an overall overestimation of floe perimeter density by the models against the observations. Comparison of the floe perimeter density distribution with the observations shows that the models exhibit a much larger proportion for small floes (radius 30–50 m). Observations and the WIPoFSD model both show a negative correlation between sea ice concentration and the floe perimeter density, but the two prognostic models (CPOM-FSD and FSDv2-WAVE) show the opposite pattern. These differences between models and the observations may be attributed to limitations in the observations (e.g. the image resolution is not sufficient to detect small floes) or limitations in the model parameterisations, including the use of a global power-law exponent in the WIPoFSD model as well as too weak a floe welding and enhanced wave fracture in the prognostic models. |
format |
Article in Journal/Newspaper |
author |
Wang, Yanan Hwang, Byongjun (Phil) Bateson, Adam William Aksenov, Yevgeny Horvat, Christopher |
spellingShingle |
Wang, Yanan Hwang, Byongjun (Phil) Bateson, Adam William Aksenov, Yevgeny Horvat, Christopher Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
author_facet |
Wang, Yanan Hwang, Byongjun (Phil) Bateson, Adam William Aksenov, Yevgeny Horvat, Christopher |
author_sort |
Wang, Yanan |
title |
Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
title_short |
Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
title_full |
Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
title_fullStr |
Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
title_full_unstemmed |
Summer sea ice floe perimeter density in the Arctic:high-resolution optical satellite imagery and model evaluation |
title_sort |
summer sea ice floe perimeter density in the arctic:high-resolution optical satellite imagery and model evaluation |
publishDate |
2023 |
url |
https://pure.hud.ac.uk/en/publications/c1bf1012-4f16-4dd2-be49-f0737cf25252 https://doi.org/10.5194/tc-17-3575-2023 http://www.scopus.com/inward/record.url?scp=85172791663&partnerID=8YFLogxK |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Wang , Y , Hwang , B , Bateson , A W , Aksenov , Y & Horvat , C 2023 , ' Summer sea ice floe perimeter density in the Arctic : high-resolution optical satellite imagery and model evaluation ' , Cryosphere , vol. 17 , no. 8 , pp. 3575-3591 . https://doi.org/10.5194/tc-17-3575-2023 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-3575-2023 |
container_title |
The Cryosphere |
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17 |
container_issue |
8 |
container_start_page |
3575 |
op_container_end_page |
3591 |
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