Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data
Abstract This study evaluated feasibility statistically and analyzed, during the freezing period, the relationship between brightness temperature (Tb) data of the 37V polarisation and the GR3719 (Gradient Ratio 37V and 19V) obtained by Special Sensor Microwave/Imager from F11 and F13 satellites with...
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ftdoajarticles:oai:doaj.org/article:299bb73d77214aaaa43e195426f0eddb 2023-12-10T09:42:57+01:00 Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data FERNANDO LUIS HILLEBRAND MARCOS W.D. DE FREITAS ULISSES F. BREMER TALES C. ABRANTES JEFFERSON C. SIMÕES CLÁUDIO W. MENDES JÚNIOR FREDERICO SCHARDONG JORGE ARIGONY-NETO 2023-11-01T00:00:00Z https://doi.org/10.1590/0001-3765202320230342 https://doaj.org/article/299bb73d77214aaaa43e195426f0eddb EN eng Academia Brasileira de Ciências http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601107&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230342 https://doaj.org/article/299bb73d77214aaaa43e195426f0eddb Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) Spectral linear mixing model multiple linear regression sea ice concentration brightness temperature Science Q article 2023 ftdoajarticles https://doi.org/10.1590/0001-3765202320230342 2023-11-12T01:39:42Z Abstract This study evaluated feasibility statistically and analyzed, during the freezing period, the relationship between brightness temperature (Tb) data of the 37V polarisation and the GR3719 (Gradient Ratio 37V and 19V) obtained by Special Sensor Microwave/Imager from F11 and F13 satellites with sea ice thickness (SIT) data obtained in the Weddell Sea through Antarctic Sea Ice Processes and Climate program. The multiple linear regression (MLR) was applied at 1,520 points, with 70% of these points being randomly separated to generate the MLR and 30% to carry out the validation. To perform the temporal mapping, the MLR was applied only to pixels with sea ice concentration (SIC) ≥ 90%, obtained through the fraction image calculated from the spectral linear mixing model (SLMM) using the Tb in the channels and polarizations 19H, 19V and 37V. The results of the SLMM validation process for estimating the SIC were σ = 10.5%, RMSE = 11.0%, and bias = -2.8%, and the SIT based on the MLR, the results were R² = 0.57, RMSE = 0.268 m, and bias = 0.103 m. In the SIT mapping, we highlight the trend of thickness reduction on the east coast of the Antarctic Peninsula during the period 1992–2009. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell Anais da Academia Brasileira de Ciências 95 suppl 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Spectral linear mixing model multiple linear regression sea ice concentration brightness temperature Science Q |
spellingShingle |
Spectral linear mixing model multiple linear regression sea ice concentration brightness temperature Science Q FERNANDO LUIS HILLEBRAND MARCOS W.D. DE FREITAS ULISSES F. BREMER TALES C. ABRANTES JEFFERSON C. SIMÕES CLÁUDIO W. MENDES JÚNIOR FREDERICO SCHARDONG JORGE ARIGONY-NETO Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
topic_facet |
Spectral linear mixing model multiple linear regression sea ice concentration brightness temperature Science Q |
description |
Abstract This study evaluated feasibility statistically and analyzed, during the freezing period, the relationship between brightness temperature (Tb) data of the 37V polarisation and the GR3719 (Gradient Ratio 37V and 19V) obtained by Special Sensor Microwave/Imager from F11 and F13 satellites with sea ice thickness (SIT) data obtained in the Weddell Sea through Antarctic Sea Ice Processes and Climate program. The multiple linear regression (MLR) was applied at 1,520 points, with 70% of these points being randomly separated to generate the MLR and 30% to carry out the validation. To perform the temporal mapping, the MLR was applied only to pixels with sea ice concentration (SIC) ≥ 90%, obtained through the fraction image calculated from the spectral linear mixing model (SLMM) using the Tb in the channels and polarizations 19H, 19V and 37V. The results of the SLMM validation process for estimating the SIC were σ = 10.5%, RMSE = 11.0%, and bias = -2.8%, and the SIT based on the MLR, the results were R² = 0.57, RMSE = 0.268 m, and bias = 0.103 m. In the SIT mapping, we highlight the trend of thickness reduction on the east coast of the Antarctic Peninsula during the period 1992–2009. |
format |
Article in Journal/Newspaper |
author |
FERNANDO LUIS HILLEBRAND MARCOS W.D. DE FREITAS ULISSES F. BREMER TALES C. ABRANTES JEFFERSON C. SIMÕES CLÁUDIO W. MENDES JÚNIOR FREDERICO SCHARDONG JORGE ARIGONY-NETO |
author_facet |
FERNANDO LUIS HILLEBRAND MARCOS W.D. DE FREITAS ULISSES F. BREMER TALES C. ABRANTES JEFFERSON C. SIMÕES CLÁUDIO W. MENDES JÚNIOR FREDERICO SCHARDONG JORGE ARIGONY-NETO |
author_sort |
FERNANDO LUIS HILLEBRAND |
title |
Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
title_short |
Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
title_full |
Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
title_fullStr |
Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
title_full_unstemmed |
Concentration and thickness of sea ice in the Weddell Sea from SSM/I passive microwave radiometer data |
title_sort |
concentration and thickness of sea ice in the weddell sea from ssm/i passive microwave radiometer data |
publisher |
Academia Brasileira de Ciências |
publishDate |
2023 |
url |
https://doi.org/10.1590/0001-3765202320230342 https://doaj.org/article/299bb73d77214aaaa43e195426f0eddb |
geographic |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Weddell Sea Weddell |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea |
op_source |
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601107&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230342 https://doaj.org/article/299bb73d77214aaaa43e195426f0eddb |
op_doi |
https://doi.org/10.1590/0001-3765202320230342 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
95 |
container_issue |
suppl 3 |
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1784886035695534080 |