Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica)
Selected case studies of precipitating ice clouds at Dome C (Antarctic Plateau) were used to test a new approach for the estimation of ice cloud reflectivity at 24 GHz (12.37 mm wavelength) using ground-based far in- frared spectral measurements from the REFIR-PAD Fourier transform spectroradiometer...
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ftunibolognairis:oai:cris.unibo.it:11585/910127 2024-09-15T17:47:01+00:00 Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca 2022 ELETTRONICO https://hdl.handle.net/11585/910127 https://doi.org/10.5194/amt-15-7235-2022 https://amt.copernicus.org/articles/15/7235/2022/amt-15-7235-2022.pdf eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000899755500001 volume:15 issue:24 firstpage:7235 lastpage:7258 numberofpages:24 journal:ATMOSPHERIC MEASUREMENT TECHNIQUES https://hdl.handle.net/11585/910127 doi:10.5194/amt-15-7235-2022 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145558363 https://amt.copernicus.org/articles/15/7235/2022/amt-15-7235-2022.pdf info:eu-repo/semantics/openAccess far infrared clouds interferometry radar Antarctic Plateau info:eu-repo/semantics/article 2022 ftunibolognairis https://doi.org/10.5194/amt-15-7235-2022 2024-07-01T14:08:29Z Selected case studies of precipitating ice clouds at Dome C (Antarctic Plateau) were used to test a new approach for the estimation of ice cloud reflectivity at 24 GHz (12.37 mm wavelength) using ground-based far in- frared spectral measurements from the REFIR-PAD Fourier transform spectroradiometer and backscattering/depolariza- tion lidar profiles. The resulting reflectivity was evaluated with the direct reflectivity measurements provided by a co- located micro rain radar (MRR) operating at 24 GHz, that was able to detect falling crystals with large particle size, typically above 600 μm. To obtain the 24 GHz reflectivity, we used the particle effective diameter and the cloud opti- cal depth retrieved from the far infrared spectral radiances provided by REFIR-PAD and the tropospheric co-located backscattering lidar to calculate the modal radius and the intercept of the particle size distribution. These parameters spanned in the wide ranges between 570–2400 μm and 10−2– 104 cm−5, respectively. The retrieved effective sizes and opti- cal depths mostly varied in the ranges 70–250 μm and 0.1–5, respectively. From these parameters, the theoretical reflectiv- ity at 24 GHz was obtained by integrating the size distribu- tion over different cross sections for various habit crystals provided by Eriksson et al. (2018) databases. From the com- parison with the radar reflectivity measurements, we found that the hexagonal column-like habits, the columnar crys- tal aggregates, and the 5/6 branches bullet rosettes showed the best agreement with the MRR observations. The disper- sion coefficient of the crystal particle size distribution was assumed in the range 0–2 according to the temperature de- pendence found in previous studies. The retrieved values of the intercept and slope were found in good agreement with these studies. The presence of the inferred habits was con- firmed by the crystal images taken by the ICE-CAMERA, operating in proximity of REFIR-PAD and the MRR. In par- ticular, the occurrence of hexagonal ... Article in Journal/Newspaper Antarc* Antarctic Antarctica IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Atmospheric Measurement Techniques 15 24 7235 7258 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
far infrared clouds interferometry radar Antarctic Plateau |
spellingShingle |
far infrared clouds interferometry radar Antarctic Plateau Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
topic_facet |
far infrared clouds interferometry radar Antarctic Plateau |
description |
Selected case studies of precipitating ice clouds at Dome C (Antarctic Plateau) were used to test a new approach for the estimation of ice cloud reflectivity at 24 GHz (12.37 mm wavelength) using ground-based far in- frared spectral measurements from the REFIR-PAD Fourier transform spectroradiometer and backscattering/depolariza- tion lidar profiles. The resulting reflectivity was evaluated with the direct reflectivity measurements provided by a co- located micro rain radar (MRR) operating at 24 GHz, that was able to detect falling crystals with large particle size, typically above 600 μm. To obtain the 24 GHz reflectivity, we used the particle effective diameter and the cloud opti- cal depth retrieved from the far infrared spectral radiances provided by REFIR-PAD and the tropospheric co-located backscattering lidar to calculate the modal radius and the intercept of the particle size distribution. These parameters spanned in the wide ranges between 570–2400 μm and 10−2– 104 cm−5, respectively. The retrieved effective sizes and opti- cal depths mostly varied in the ranges 70–250 μm and 0.1–5, respectively. From these parameters, the theoretical reflectiv- ity at 24 GHz was obtained by integrating the size distribu- tion over different cross sections for various habit crystals provided by Eriksson et al. (2018) databases. From the com- parison with the radar reflectivity measurements, we found that the hexagonal column-like habits, the columnar crys- tal aggregates, and the 5/6 branches bullet rosettes showed the best agreement with the MRR observations. The disper- sion coefficient of the crystal particle size distribution was assumed in the range 0–2 according to the temperature de- pendence found in previous studies. The retrieved values of the intercept and slope were found in good agreement with these studies. The presence of the inferred habits was con- firmed by the crystal images taken by the ICE-CAMERA, operating in proximity of REFIR-PAD and the MRR. In par- ticular, the occurrence of hexagonal ... |
author2 |
Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca |
format |
Article in Journal/Newspaper |
author |
Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca |
author_facet |
Di Natale, Gianluca Turner, David D. Bianchini, Giovanni Del Guasta, Massimo Palchetti, Luca Bracci, Alessandro Baldini, Luca Maestri, Tiziano Cossich, William Martinazzo, Michele Facheris, Luca |
author_sort |
Di Natale, Gianluca |
title |
Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
title_short |
Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
title_full |
Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
title_fullStr |
Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
title_full_unstemmed |
Consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at Dome C (Antarctica) |
title_sort |
consistency test of precipitating ice cloud retrieval properties obtained from the observations of different instruments operating at dome c (antarctica) |
publishDate |
2022 |
url |
https://hdl.handle.net/11585/910127 https://doi.org/10.5194/amt-15-7235-2022 https://amt.copernicus.org/articles/15/7235/2022/amt-15-7235-2022.pdf |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000899755500001 volume:15 issue:24 firstpage:7235 lastpage:7258 numberofpages:24 journal:ATMOSPHERIC MEASUREMENT TECHNIQUES https://hdl.handle.net/11585/910127 doi:10.5194/amt-15-7235-2022 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85145558363 https://amt.copernicus.org/articles/15/7235/2022/amt-15-7235-2022.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-15-7235-2022 |
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