Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica
Abstract. From 15 March to 8 April 2011 and from 4 to 5 March 2013, the atmosphere above Dome C (Concordia station, Antarctica, 75°06' S, 123°21' E, 3233 m amsl) has been probed by several instruments and model to study episodes of thick cloud and diamond dust (cloud constituted of suspend...
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ftopenaccessrep:oai:zenodo.org:29297 2023-05-15T13:47:41+02:00 Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica Ricaud, Philippe Bazile, Eric del Guasta, Massimo Lanconelli, Christian Grigioni, Paolo Mahjoub, Achraf 2016-09-15 https://www.openaccessrepository.it/record/29297 https://doi.org/10.5194/acp-2016-815 und unknown https://www.openaccessrepository.it/record/29297 doi:10.5194/acp-2016-815 info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by CC-BY info:eu-repo/semantics/article publication-article 2016 ftopenaccessrep https://doi.org/10.5194/acp-2016-815 2022-11-23T06:44:48Z Abstract. From 15 March to 8 April 2011 and from 4 to 5 March 2013, the atmosphere above Dome C (Concordia station, Antarctica, 75°06' S, 123°21' E, 3233 m amsl) has been probed by several instruments and model to study episodes of thick cloud and diamond dust (cloud constituted of suspended ice crystals). 1) A ground-based microwave radiometer (HAMSTRAD, H 2 O Antarctica Microwave Stratospheric and Tropospheric Radiometers) installed at Dome C that provided vertical profiles of tropospheric temperature and absolute humidity to calculate Integrated Water Vapour (IWV). 2) Daily radiosoundings launched at 12:00 UTC at Dome C. 3) A tropospheric aerosol Lidar that provides aerosol depolarization ratio along the vertical at Dome C. 4) Down- and upward short- and longwave radiations as provided by the Baseline Surface Radiation Network (BSRN) facilities. 5) Space-borne aerosol depolarization ratio from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) Lidar aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) platform along orbits close to the Dome C station. The time evolution of the atmosphere has also been evaluated by considering the outputs from the meso-scale AROME and the global-scale ARPEGE meteorological models. Two distinct periods are highlighted by all the datasets: the warm and wet periods (24–26 March 2011 and 4 March 2013) and the cold and dry periods (5 April 2011 and 5 March 2013). Combining radiation and active measurements of aerosols with nebulosity calculations, a thick cloud is detected during the warm and wet periods with high depolarization ratios (greater than 30 %) from the surface to 5–7 km altitude associated with precipitation of ice particles and the presence of a supercooled liquid water (depolarization of about 10 %) cloud. During the cold and dry periods, high depolarization ratios (greater than 30 %) to a maximum altitude of 100–500 m are measured suggesting that the cloud is constituted of ice crystals with no trace of precipitation. ... Article in Journal/Newspaper Antarc* Antarctica Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Concordia Station ENVELOPE(123.333,123.333,-75.100,-75.100) |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
unknown |
description |
Abstract. From 15 March to 8 April 2011 and from 4 to 5 March 2013, the atmosphere above Dome C (Concordia station, Antarctica, 75°06' S, 123°21' E, 3233 m amsl) has been probed by several instruments and model to study episodes of thick cloud and diamond dust (cloud constituted of suspended ice crystals). 1) A ground-based microwave radiometer (HAMSTRAD, H 2 O Antarctica Microwave Stratospheric and Tropospheric Radiometers) installed at Dome C that provided vertical profiles of tropospheric temperature and absolute humidity to calculate Integrated Water Vapour (IWV). 2) Daily radiosoundings launched at 12:00 UTC at Dome C. 3) A tropospheric aerosol Lidar that provides aerosol depolarization ratio along the vertical at Dome C. 4) Down- and upward short- and longwave radiations as provided by the Baseline Surface Radiation Network (BSRN) facilities. 5) Space-borne aerosol depolarization ratio from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) Lidar aboard the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) platform along orbits close to the Dome C station. The time evolution of the atmosphere has also been evaluated by considering the outputs from the meso-scale AROME and the global-scale ARPEGE meteorological models. Two distinct periods are highlighted by all the datasets: the warm and wet periods (24–26 March 2011 and 4 March 2013) and the cold and dry periods (5 April 2011 and 5 March 2013). Combining radiation and active measurements of aerosols with nebulosity calculations, a thick cloud is detected during the warm and wet periods with high depolarization ratios (greater than 30 %) from the surface to 5–7 km altitude associated with precipitation of ice particles and the presence of a supercooled liquid water (depolarization of about 10 %) cloud. During the cold and dry periods, high depolarization ratios (greater than 30 %) to a maximum altitude of 100–500 m are measured suggesting that the cloud is constituted of ice crystals with no trace of precipitation. ... |
format |
Article in Journal/Newspaper |
author |
Ricaud, Philippe Bazile, Eric del Guasta, Massimo Lanconelli, Christian Grigioni, Paolo Mahjoub, Achraf |
spellingShingle |
Ricaud, Philippe Bazile, Eric del Guasta, Massimo Lanconelli, Christian Grigioni, Paolo Mahjoub, Achraf Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
author_facet |
Ricaud, Philippe Bazile, Eric del Guasta, Massimo Lanconelli, Christian Grigioni, Paolo Mahjoub, Achraf |
author_sort |
Ricaud, Philippe |
title |
Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
title_short |
Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
title_full |
Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
title_fullStr |
Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
title_full_unstemmed |
Genesis of Diamond Dust and Thick Cloud Episodes observed above Dome C, Antarctica |
title_sort |
genesis of diamond dust and thick cloud episodes observed above dome c, antarctica |
publishDate |
2016 |
url |
https://www.openaccessrepository.it/record/29297 https://doi.org/10.5194/acp-2016-815 |
long_lat |
ENVELOPE(123.333,123.333,-75.100,-75.100) |
geographic |
Concordia Station |
geographic_facet |
Concordia Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://www.openaccessrepository.it/record/29297 doi:10.5194/acp-2016-815 |
op_rights |
info:eu-repo/semantics/openAccess http://www.opendefinition.org/licenses/cc-by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-2016-815 |
_version_ |
1766247673464094720 |