Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica
Microwave brightness temperatures observed in Antarctica at 89 GHz from the advanced microwave sounding unit B (AMSU-B) point out an exceptional decrease of 57 K at Dome Fuji ( 77.31°S , 39.70°E ) during the 2019–2020 summer. The grain size index (GSI) based on 89 and 150 GHz from AMSU-B and indepen...
Published in: | IEEE Geoscience and Remote Sensing Letters |
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Online Access: | https://hdl.handle.net/10278/5053021 https://doi.org/10.1109/lgrs.2024.3367111 |
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ftuniveneziairis:oai:iris.unive.it:10278/5053021 2024-04-21T07:51:59+00:00 Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain 2024 https://hdl.handle.net/10278/5053021 https://doi.org/10.1109/lgrs.2024.3367111 unknown volume:21 firstpage:1 lastpage:5 numberofpages:5 journal:IEEE GEOSCIENCE AND REMOTE SENSING LETTERS https://hdl.handle.net/10278/5053021 doi:10.1109/lgrs.2024.3367111 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85186082568 info:eu-repo/semantics/openAccess Settore GEO/11 - Geofisica Applicata info:eu-repo/semantics/article 2024 ftuniveneziairis https://doi.org/10.1109/lgrs.2024.3367111 2024-03-28T01:22:06Z Microwave brightness temperatures observed in Antarctica at 89 GHz from the advanced microwave sounding unit B (AMSU-B) point out an exceptional decrease of 57 K at Dome Fuji ( 77.31°S , 39.70°E ) during the 2019–2020 summer. The grain size index (GSI) based on 89 and 150 GHz from AMSU-B and independent observations at 89 GHz from the advanced microwave scanning radiometer 2 (AMSR-2) also show concurrent unusual values. To explain such event, a theoretical analysis was carried out by means of a radiative transfer model. We explore the sensitivity of brightness temperature to surface snow properties focusing on December, just before the decrease, and April, at its end. Results confirm that this variation is mainly related to an increase in snow grain size. A decrease in snow density is also involved as suggested by the increase in brightness temperature at 1.4 GHz from soil moisture and ocean salinity (SMOS) and in the polarization ratio at 36 GHz from AMSR-2. Extreme values observed at multiple frequencies, as well as peculiar atmospheric conditions explored in a previous study, confirm the uniqueness of this event at least on decennial scale. Article in Journal/Newspaper Antarc* Antarctica Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) IEEE Geoscience and Remote Sensing Letters 21 1 5 |
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Open Polar |
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Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
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ftuniveneziairis |
language |
unknown |
topic |
Settore GEO/11 - Geofisica Applicata |
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Settore GEO/11 - Geofisica Applicata Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
topic_facet |
Settore GEO/11 - Geofisica Applicata |
description |
Microwave brightness temperatures observed in Antarctica at 89 GHz from the advanced microwave sounding unit B (AMSU-B) point out an exceptional decrease of 57 K at Dome Fuji ( 77.31°S , 39.70°E ) during the 2019–2020 summer. The grain size index (GSI) based on 89 and 150 GHz from AMSU-B and independent observations at 89 GHz from the advanced microwave scanning radiometer 2 (AMSR-2) also show concurrent unusual values. To explain such event, a theoretical analysis was carried out by means of a radiative transfer model. We explore the sensitivity of brightness temperature to surface snow properties focusing on December, just before the decrease, and April, at its end. Results confirm that this variation is mainly related to an increase in snow grain size. A decrease in snow density is also involved as suggested by the increase in brightness temperature at 1.4 GHz from soil moisture and ocean salinity (SMOS) and in the polarization ratio at 36 GHz from AMSR-2. Extreme values observed at multiple frequencies, as well as peculiar atmospheric conditions explored in a previous study, confirm the uniqueness of this event at least on decennial scale. |
author2 |
Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain |
format |
Article in Journal/Newspaper |
author |
Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain |
author_facet |
Stefanini, Claudio Macelloni, Giovanni Leduc-Leballeur, Marion Picard, Ghislain |
author_sort |
Stefanini, Claudio |
title |
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
title_short |
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
title_full |
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
title_fullStr |
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
title_full_unstemmed |
Influence of Surface Snow Properties on an 89-GHz Brightness Temperature Extreme Event at Dome Fuji, Antarctica |
title_sort |
influence of surface snow properties on an 89-ghz brightness temperature extreme event at dome fuji, antarctica |
publishDate |
2024 |
url |
https://hdl.handle.net/10278/5053021 https://doi.org/10.1109/lgrs.2024.3367111 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
volume:21 firstpage:1 lastpage:5 numberofpages:5 journal:IEEE GEOSCIENCE AND REMOTE SENSING LETTERS https://hdl.handle.net/10278/5053021 doi:10.1109/lgrs.2024.3367111 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85186082568 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1109/lgrs.2024.3367111 |
container_title |
IEEE Geoscience and Remote Sensing Letters |
container_volume |
21 |
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1 |
op_container_end_page |
5 |
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1796935260723740672 |