THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA
Sea ice has an important role of reflecting the solar radiation back into space. In addition, the heat flux of ice in thin ice areas is strongly affected by the ice thickness difference. Therefore, ice thickness is one of the most important parameters of sea ice. In our previous study, the authors h...
Published in: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
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ftdoajarticles:oai:doaj.org/article:2a0d446dfb8c471ba19d33ffd2cec18a 2023-05-15T15:43:29+02:00 THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA K. Cho K. Miyao K. Naoki 2019-03-01T00:00:00Z https://doi.org/10.5194/isprs-archives-XLII-3-W7-5-2019 https://doaj.org/article/2a0d446dfb8c471ba19d33ffd2cec18a EN eng Copernicus Publications https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-3-W7/5/2019/isprs-archives-XLII-3-W7-5-2019.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLII-3-W7-5-2019 1682-1750 2194-9034 https://doaj.org/article/2a0d446dfb8c471ba19d33ffd2cec18a The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-3-W7, Pp 5-9 (2019) Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 article 2019 ftdoajarticles https://doi.org/10.5194/isprs-archives-XLII-3-W7-5-2019 2023-01-08T01:25:12Z Sea ice has an important role of reflecting the solar radiation back into space. In addition, the heat flux of ice in thin ice areas is strongly affected by the ice thickness difference. Therefore, ice thickness is one of the most important parameters of sea ice. In our previous study, the authors have developed a thin ice area extraction algorithm using passive microwave radiometer AMSR2 for the Sea of Okhotsk. The basic idea of the algorithm is to use the brightness temperature scatter plots of AMSR2 19 GHz polarization on difference (V-H) vs 19 GHz V polarization. The algorithm was also applicable to the Bering Sea, and could extract most of the thin n ice areas. However, two problems have become clear. One was that some of the thin ice areas were not well extracted, and the other was that some of the consolidated ice were mis-extracted as thin ice areas. In this study, the authors have improved the thin ice area extraction algorithm to solve these problems. By adjusting the parameters of the algorithm applied to the brightness temperature scatter plots of AMSR2 19 GHz polarization difference (V-H) vs 19 GHz V polarization, most of the thin ice areas were also well extracted in the Bering Sea. The authors also introduced an equation using the brightness temperatures difference of 89GHz vertical and horizontal polarization to reject the thin ice area misextracted over consolidated ice. By applying the above two methods to AMSR2 data, most of the thin ice areas in the Bering Sea were well extracted. The algorithm was also applied to the Gulf of St. Lawrence with good result. The thin ice area extracted data are planed to be approved by JAXA as a AMSR2 research product. Article in Journal/Newspaper Bering Sea Sea ice Directory of Open Access Journals: DOAJ Articles Bering Sea Okhotsk The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W7 5 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
spellingShingle |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 K. Cho K. Miyao K. Naoki THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
topic_facet |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
description |
Sea ice has an important role of reflecting the solar radiation back into space. In addition, the heat flux of ice in thin ice areas is strongly affected by the ice thickness difference. Therefore, ice thickness is one of the most important parameters of sea ice. In our previous study, the authors have developed a thin ice area extraction algorithm using passive microwave radiometer AMSR2 for the Sea of Okhotsk. The basic idea of the algorithm is to use the brightness temperature scatter plots of AMSR2 19 GHz polarization on difference (V-H) vs 19 GHz V polarization. The algorithm was also applicable to the Bering Sea, and could extract most of the thin n ice areas. However, two problems have become clear. One was that some of the thin ice areas were not well extracted, and the other was that some of the consolidated ice were mis-extracted as thin ice areas. In this study, the authors have improved the thin ice area extraction algorithm to solve these problems. By adjusting the parameters of the algorithm applied to the brightness temperature scatter plots of AMSR2 19 GHz polarization difference (V-H) vs 19 GHz V polarization, most of the thin ice areas were also well extracted in the Bering Sea. The authors also introduced an equation using the brightness temperatures difference of 89GHz vertical and horizontal polarization to reject the thin ice area misextracted over consolidated ice. By applying the above two methods to AMSR2 data, most of the thin ice areas in the Bering Sea were well extracted. The algorithm was also applied to the Gulf of St. Lawrence with good result. The thin ice area extracted data are planed to be approved by JAXA as a AMSR2 research product. |
format |
Article in Journal/Newspaper |
author |
K. Cho K. Miyao K. Naoki |
author_facet |
K. Cho K. Miyao K. Naoki |
author_sort |
K. Cho |
title |
THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
title_short |
THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
title_full |
THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
title_fullStr |
THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
title_full_unstemmed |
THIN ICE AREA EXTRACTION IN THE SEASONAL SEA ICE ZONES OF THE NORTHERN HEMISPHERE USING ASMR2 DATA |
title_sort |
thin ice area extraction in the seasonal sea ice zones of the northern hemisphere using asmr2 data |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/isprs-archives-XLII-3-W7-5-2019 https://doaj.org/article/2a0d446dfb8c471ba19d33ffd2cec18a |
geographic |
Bering Sea Okhotsk |
geographic_facet |
Bering Sea Okhotsk |
genre |
Bering Sea Sea ice |
genre_facet |
Bering Sea Sea ice |
op_source |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-3-W7, Pp 5-9 (2019) |
op_relation |
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-3-W7/5/2019/isprs-archives-XLII-3-W7-5-2019.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLII-3-W7-5-2019 1682-1750 2194-9034 https://doaj.org/article/2a0d446dfb8c471ba19d33ffd2cec18a |
op_doi |
https://doi.org/10.5194/isprs-archives-XLII-3-W7-5-2019 |
container_title |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
container_volume |
XLII-3/W7 |
container_start_page |
5 |
op_container_end_page |
9 |
_version_ |
1766377654647259136 |