Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data
Radar backscattering properties can be extremely sensitive to the freeze/thaw states of the ground surface. This study aims to evaluate the changes of L-band microwave scattering characteristics between thawed and frozen conditions by using polarimetric scattering mechanism indicators. ALOS PALSAR p...
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ftdoajarticles:oai:doaj.org/article:aa6e5b37f6514679b7940655dc305a03 2023-05-15T17:56:30+02:00 Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data Sang-Eun Park 2015-12-01T00:00:00Z https://doi.org/10.3390/rs71215874 https://doaj.org/article/aa6e5b37f6514679b7940655dc305a03 EN eng MDPI AG http://www.mdpi.com/2072-4292/7/12/15874 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs71215874 https://doaj.org/article/aa6e5b37f6514679b7940655dc305a03 Remote Sensing, Vol 7, Iss 12, Pp 17135-17148 (2015) synthetic aperture radar (SAR) radar polarimetry microwave scattering mechanism permafrost active layer freeze/thaw ALOS PALSAR Science Q article 2015 ftdoajarticles https://doi.org/10.3390/rs71215874 2022-12-31T04:02:19Z Radar backscattering properties can be extremely sensitive to the freeze/thaw states of the ground surface. This study aims to evaluate the changes of L-band microwave scattering characteristics between thawed and frozen conditions by using polarimetric scattering mechanism indicators. ALOS PALSAR polarimetric mode data acquired in winter and spring seasons over Eastern Siberia are used in this study. Experimental results show that the actual scattering mechanisms and their seasonal variations over various forested and non-forested permafrost ecosystems can be successfully characterized by the polarimetric target decomposition parameters and the polarimetric coherences. In addition, fully polarimetric radar observations exhibit great potential for mapping land cover types and surficial features in the permafrost active layer. Particularly, the co-polarization coherences on the HV-polarization basis and circular-polarization basis were found to be very useful for discriminating different surficial geocryological characteristics in recently burnt forests and thermokarst regions. Article in Journal/Newspaper permafrost Thermokarst Siberia Directory of Open Access Journals: DOAJ Articles Remote Sensing 7 12 17135 17148 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
synthetic aperture radar (SAR) radar polarimetry microwave scattering mechanism permafrost active layer freeze/thaw ALOS PALSAR Science Q |
spellingShingle |
synthetic aperture radar (SAR) radar polarimetry microwave scattering mechanism permafrost active layer freeze/thaw ALOS PALSAR Science Q Sang-Eun Park Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
topic_facet |
synthetic aperture radar (SAR) radar polarimetry microwave scattering mechanism permafrost active layer freeze/thaw ALOS PALSAR Science Q |
description |
Radar backscattering properties can be extremely sensitive to the freeze/thaw states of the ground surface. This study aims to evaluate the changes of L-band microwave scattering characteristics between thawed and frozen conditions by using polarimetric scattering mechanism indicators. ALOS PALSAR polarimetric mode data acquired in winter and spring seasons over Eastern Siberia are used in this study. Experimental results show that the actual scattering mechanisms and their seasonal variations over various forested and non-forested permafrost ecosystems can be successfully characterized by the polarimetric target decomposition parameters and the polarimetric coherences. In addition, fully polarimetric radar observations exhibit great potential for mapping land cover types and surficial features in the permafrost active layer. Particularly, the co-polarization coherences on the HV-polarization basis and circular-polarization basis were found to be very useful for discriminating different surficial geocryological characteristics in recently burnt forests and thermokarst regions. |
format |
Article in Journal/Newspaper |
author |
Sang-Eun Park |
author_facet |
Sang-Eun Park |
author_sort |
Sang-Eun Park |
title |
Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
title_short |
Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
title_full |
Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
title_fullStr |
Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
title_full_unstemmed |
Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data |
title_sort |
variations of microwave scattering properties by seasonal freeze/thaw transition in the permafrost active layer observed by alos palsar polarimetric data |
publisher |
MDPI AG |
publishDate |
2015 |
url |
https://doi.org/10.3390/rs71215874 https://doaj.org/article/aa6e5b37f6514679b7940655dc305a03 |
genre |
permafrost Thermokarst Siberia |
genre_facet |
permafrost Thermokarst Siberia |
op_source |
Remote Sensing, Vol 7, Iss 12, Pp 17135-17148 (2015) |
op_relation |
http://www.mdpi.com/2072-4292/7/12/15874 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs71215874 https://doaj.org/article/aa6e5b37f6514679b7940655dc305a03 |
op_doi |
https://doi.org/10.3390/rs71215874 |
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Remote Sensing |
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7 |
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12 |
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17135 |
op_container_end_page |
17148 |
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1766164676193812480 |