Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements
This paper presents the data collected during an expedition from the marginal ice zone into the multi year sea ice in the Fram Strait in MayJune 2005 to measure the variance in sea-ice types, albedo and thickness. It also describes the techniques used to analyze the data. The principal information f...
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ftawi:oai:epic.awi.de:18656 2024-09-15T18:07:02+00:00 Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements Pedersen, C. A. Hall, R. Gerland, S. Sivertsen, A. H. Svenoe, T. Haas, Christian 2009 application/pdf https://epic.awi.de/id/eprint/18656/ https://epic.awi.de/id/eprint/18656/1/Ped2008a.pdf https://doi.org/10.1016/j.coldregions.2008.08.004 https://hdl.handle.net/10013/epic.31137 https://hdl.handle.net/10013/epic.31137.d001 unknown https://epic.awi.de/id/eprint/18656/1/Ped2008a.pdf https://hdl.handle.net/10013/epic.31137.d001 Pedersen, C. A. , Hall, R. , Gerland, S. , Sivertsen, A. H. , Svenoe, T. and Haas, C. orcid:0000-0002-7674-3500 (2009) Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements , Cold Regions Science and Technology, 55 , pp. 23-32 . doi:10.1016/j.coldregions.2008.08.004 <https://doi.org/10.1016/j.coldregions.2008.08.004> , hdl:10013/epic.31137 EPIC3Cold Regions Science and Technology, 55, pp. 23-32 Article isiRev 2009 ftawi https://doi.org/10.1016/j.coldregions.2008.08.004 2024-06-24T04:00:42Z This paper presents the data collected during an expedition from the marginal ice zone into the multi year sea ice in the Fram Strait in MayJune 2005 to measure the variance in sea-ice types, albedo and thickness. It also describes the techniques used to analyze the data. The principal information from the methodologies applied derives the sea-ice types from digital photography, the spectral and broadband reflectance from spectrometer measurements and the total sea-ice thickness profile from an electromagnetic-probe. A combination of methods was used to extract more information from each data set compared to what traditionally are obtained. The digital images were standardized, textural features extracted and a trained neural network was used for classification, while the optical measurements were normalized and standardized to minimize effects from the set-up and atmospheric conditions. Measurements from June 3rd (before the onset of summer melt) showed that the fractional sea-ice types had large spatial variability, with average fractions for snow-covered sea ice of 81.0%, thick bare ice 4.0%, thin ice 5.3% and open water 9.6%, hence an average ice concentration of 90.3%. The average broadband reflectance factor was 0.73, while the average total sea-ice thickness (including snow) was 2.1 m. Relative high correlations were found between the measured albedo and sea-ice concentration (0.69). The paper also addresses the lessons learned for future fusion of data from large field campaigns. Article in Journal/Newspaper Fram Strait Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Cold Regions Science and Technology 55 1 23 32 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
This paper presents the data collected during an expedition from the marginal ice zone into the multi year sea ice in the Fram Strait in MayJune 2005 to measure the variance in sea-ice types, albedo and thickness. It also describes the techniques used to analyze the data. The principal information from the methodologies applied derives the sea-ice types from digital photography, the spectral and broadband reflectance from spectrometer measurements and the total sea-ice thickness profile from an electromagnetic-probe. A combination of methods was used to extract more information from each data set compared to what traditionally are obtained. The digital images were standardized, textural features extracted and a trained neural network was used for classification, while the optical measurements were normalized and standardized to minimize effects from the set-up and atmospheric conditions. Measurements from June 3rd (before the onset of summer melt) showed that the fractional sea-ice types had large spatial variability, with average fractions for snow-covered sea ice of 81.0%, thick bare ice 4.0%, thin ice 5.3% and open water 9.6%, hence an average ice concentration of 90.3%. The average broadband reflectance factor was 0.73, while the average total sea-ice thickness (including snow) was 2.1 m. Relative high correlations were found between the measured albedo and sea-ice concentration (0.69). The paper also addresses the lessons learned for future fusion of data from large field campaigns. |
format |
Article in Journal/Newspaper |
author |
Pedersen, C. A. Hall, R. Gerland, S. Sivertsen, A. H. Svenoe, T. Haas, Christian |
spellingShingle |
Pedersen, C. A. Hall, R. Gerland, S. Sivertsen, A. H. Svenoe, T. Haas, Christian Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
author_facet |
Pedersen, C. A. Hall, R. Gerland, S. Sivertsen, A. H. Svenoe, T. Haas, Christian |
author_sort |
Pedersen, C. A. |
title |
Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
title_short |
Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
title_full |
Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
title_fullStr |
Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
title_full_unstemmed |
Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements |
title_sort |
combined airborne profiling over fram strait sea ice: fractional sea-ice types, albedo, and thickness measurements |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/18656/ https://epic.awi.de/id/eprint/18656/1/Ped2008a.pdf https://doi.org/10.1016/j.coldregions.2008.08.004 https://hdl.handle.net/10013/epic.31137 https://hdl.handle.net/10013/epic.31137.d001 |
genre |
Fram Strait Sea ice |
genre_facet |
Fram Strait Sea ice |
op_source |
EPIC3Cold Regions Science and Technology, 55, pp. 23-32 |
op_relation |
https://epic.awi.de/id/eprint/18656/1/Ped2008a.pdf https://hdl.handle.net/10013/epic.31137.d001 Pedersen, C. A. , Hall, R. , Gerland, S. , Sivertsen, A. H. , Svenoe, T. and Haas, C. orcid:0000-0002-7674-3500 (2009) Combined airborne profiling over Fram Strait sea ice: Fractional sea-ice types, albedo, and thickness measurements , Cold Regions Science and Technology, 55 , pp. 23-32 . doi:10.1016/j.coldregions.2008.08.004 <https://doi.org/10.1016/j.coldregions.2008.08.004> , hdl:10013/epic.31137 |
op_doi |
https://doi.org/10.1016/j.coldregions.2008.08.004 |
container_title |
Cold Regions Science and Technology |
container_volume |
55 |
container_issue |
1 |
container_start_page |
23 |
op_container_end_page |
32 |
_version_ |
1810444398022885376 |