Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC
Information about sea ice surface topography and related deformation is crucial for studies of sea ice mass balance, sea ice modeling, and ship navigation through the ice pack. The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2), part of the National Aeronautics and Space Administration (NASA)...
Published in: | The Cryosphere |
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Language: | English |
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2023
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Online Access: | https://orbit.dtu.dk/en/publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd https://doi.org/10.5194/tc-17-1411-2023 https://backend.orbit.dtu.dk/ws/files/316380593/tc_17_1411_2023.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd 2024-06-23T07:50:19+00:00 Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC Ricker, R. Fons, S. Jutila, A. Hutter, N. Duncan, K. Farrell, S. L. Kurtz, N. T. Fredensborg Hansen, R. M. 2023 application/pdf https://orbit.dtu.dk/en/publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd https://doi.org/10.5194/tc-17-1411-2023 https://backend.orbit.dtu.dk/ws/files/316380593/tc_17_1411_2023.pdf eng eng https://orbit.dtu.dk/en/publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd info:eu-repo/semantics/openAccess Ricker , R , Fons , S , Jutila , A , Hutter , N , Duncan , K , Farrell , S L , Kurtz , N T & Fredensborg Hansen , R M 2023 , ' Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC ' , The Cryosphere , vol. 17 , no. 3 , pp. 1411-1429 . https://doi.org/10.5194/tc-17-1411-2023 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2023 ftdtupubl https://doi.org/10.5194/tc-17-1411-2023 2024-06-11T15:16:31Z Information about sea ice surface topography and related deformation is crucial for studies of sea ice mass balance, sea ice modeling, and ship navigation through the ice pack. The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2), part of the National Aeronautics and Space Administration (NASA) Earth Observing System, has been on orbit for over 4 years, sensing the sea ice surface topography with six laser beams capable of capturing individual features such as pressure ridges. To assess the capabilities and uncertainties of ICESat-2 products, coincident high-resolution measurements of sea ice surface topography are required. During the yearlong Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the Arctic Ocean, we successfully carried out a coincident underflight of ICESat-2 with a helicopter-based airborne laser scanner (ALS), achieving an overlap of more than 100 km. Despite the comparably short data set, the high-resolution centimeter-scale measurements of the ALS can be used to evaluate the performance of ICESat-2 products. Our goal is to investigate how the sea ice surface roughness and topography are represented in different ICESat-2 products as well as how sensitive ICESat-2 products are to leads and small cracks in the ice cover. Here, we compare the ALS measurements with ICESat-2's primary sea ice height product, ATL07, and the high-fidelity surface elevation product developed by the University of Maryland (UMD). By applying a ridge-detection algorithm, we find that 16 % (4 %) of the number of obstacles in the ALS data set are found using the strong (weak) center beam in ATL07. Significantly higher detection rates of 42 % (30 %) are achieved when using the UMD product. While only one lead is indicated in ATL07 for the underflight, the ALS reveals many small, narrow, and only partly open cracks that appear to be overlooked by ATL07. Article in Journal/Newspaper Arctic Arctic Ocean ice pack Sea ice The Cryosphere Technical University of Denmark: DTU Orbit Arctic Arctic Ocean The Cryosphere 17 3 1411 1429 |
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Open Polar |
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Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Ricker, R. Fons, S. Jutila, A. Hutter, N. Duncan, K. Farrell, S. L. Kurtz, N. T. Fredensborg Hansen, R. M. Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Information about sea ice surface topography and related deformation is crucial for studies of sea ice mass balance, sea ice modeling, and ship navigation through the ice pack. The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2), part of the National Aeronautics and Space Administration (NASA) Earth Observing System, has been on orbit for over 4 years, sensing the sea ice surface topography with six laser beams capable of capturing individual features such as pressure ridges. To assess the capabilities and uncertainties of ICESat-2 products, coincident high-resolution measurements of sea ice surface topography are required. During the yearlong Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the Arctic Ocean, we successfully carried out a coincident underflight of ICESat-2 with a helicopter-based airborne laser scanner (ALS), achieving an overlap of more than 100 km. Despite the comparably short data set, the high-resolution centimeter-scale measurements of the ALS can be used to evaluate the performance of ICESat-2 products. Our goal is to investigate how the sea ice surface roughness and topography are represented in different ICESat-2 products as well as how sensitive ICESat-2 products are to leads and small cracks in the ice cover. Here, we compare the ALS measurements with ICESat-2's primary sea ice height product, ATL07, and the high-fidelity surface elevation product developed by the University of Maryland (UMD). By applying a ridge-detection algorithm, we find that 16 % (4 %) of the number of obstacles in the ALS data set are found using the strong (weak) center beam in ATL07. Significantly higher detection rates of 42 % (30 %) are achieved when using the UMD product. While only one lead is indicated in ATL07 for the underflight, the ALS reveals many small, narrow, and only partly open cracks that appear to be overlooked by ATL07. |
format |
Article in Journal/Newspaper |
author |
Ricker, R. Fons, S. Jutila, A. Hutter, N. Duncan, K. Farrell, S. L. Kurtz, N. T. Fredensborg Hansen, R. M. |
author_facet |
Ricker, R. Fons, S. Jutila, A. Hutter, N. Duncan, K. Farrell, S. L. Kurtz, N. T. Fredensborg Hansen, R. M. |
author_sort |
Ricker, R. |
title |
Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
title_short |
Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
title_full |
Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
title_fullStr |
Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
title_full_unstemmed |
Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC |
title_sort |
linking scales of sea ice surface topography: evaluation of icesat-2 measurements with coincident helicopter laser scanning during mosaic |
publishDate |
2023 |
url |
https://orbit.dtu.dk/en/publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd https://doi.org/10.5194/tc-17-1411-2023 https://backend.orbit.dtu.dk/ws/files/316380593/tc_17_1411_2023.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean ice pack Sea ice The Cryosphere |
genre_facet |
Arctic Arctic Ocean ice pack Sea ice The Cryosphere |
op_source |
Ricker , R , Fons , S , Jutila , A , Hutter , N , Duncan , K , Farrell , S L , Kurtz , N T & Fredensborg Hansen , R M 2023 , ' Linking scales of sea ice surface topography: evaluation of ICESat-2 measurements with coincident helicopter laser scanning during MOSAiC ' , The Cryosphere , vol. 17 , no. 3 , pp. 1411-1429 . https://doi.org/10.5194/tc-17-1411-2023 |
op_relation |
https://orbit.dtu.dk/en/publications/85ee4648-22a9-4a3f-a3ac-0086823b9ddd |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-1411-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
3 |
container_start_page |
1411 |
op_container_end_page |
1429 |
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1802641179709276160 |