Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica
Abstract. A comprehensive analysis of the water budget over the Dome C (Concordia, Antarctica) station has been performed during the austral summer 2018–2019 as part of the Year of Polar Prediction (YOPP) international campaign. Thin (∼100 m deep) supercooled liquid water (SLW) clouds have bee...
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ftopenaccessrep:oai:zenodo.org:29299 2024-09-15T17:41:22+00:00 Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica P. Ricaud M. Del Guasta E. Bazile N. Azouz A. Lupi P. Durand J.-L. Attié D. Veron V. Guidard P. Grigioni 2020-04-01 https://www.openaccessrepository.it/record/29299 https://doi.org/10.5194/acp-20-4167-2020 eng eng https://www.openaccessrepository.it/record/29299 doi:10.5194/acp-20-4167-2020 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Atmospheric Science info:eu-repo/semantics/article publication-article 2020 ftopenaccessrep https://doi.org/10.5194/acp-20-4167-2020 2024-07-29T03:27:38Z Abstract. A comprehensive analysis of the water budget over the Dome C (Concordia, Antarctica) station has been performed during the austral summer 2018–2019 as part of the Year of Polar Prediction (YOPP) international campaign. Thin (∼100 m deep) supercooled liquid water (SLW) clouds have been detected and analysed using remotely sensed observations at the station (tropospheric depolarization lidar, the H2O Antarctica Microwave Stratospheric and Tropospheric Radiometer (HAMSTRAD), net surface radiation from the Baseline Surface Radiation Network (BSRN)), radiosondes, and satellite observations (CALIOP, Cloud-Aerosol LIdar with Orthogonal Polarization/CALIPSO, Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observations) combined with a specific configuration of the numerical weather prediction model: ARPEGE-SH (Action de Recherche Petite Echelle Grande Echelle – Southern Hemisphere). The analysis shows that SLW clouds were present from November to March, with the greatest frequency occurring in December and January when ∼50 % of the days in summer time exhibited SLW clouds for at least 1 h. Two case studies are used to illustrate this phenomenon. On 24 December 2018, the atmospheric planetary boundary layer (PBL) evolved following a typical diurnal variation, which is to say with a warm and dry mixing layer at local noon thicker than the cold and dry stable layer at local midnight. Our study showed that the SLW clouds were observed at Dome C within the entrainment and the capping inversion zones at the top of the PBL. ARPEGE-SH was not able to correctly estimate the ratio between liquid and solid water inside the clouds with the liquid water path (LWP) strongly underestimated by a factor of 1000 compared to observations. The lack of simulated SLW in the model impacted the net surface radiation that was 20–30 W m−2 higher in the BSRN observations than in the ARPEGE-SH calculations, mainly attributable to the BSRN longwave downward surface radiation being 50 W m−2 greater than ... Article in Journal/Newspaper Antarc* Antarctica Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Atmospheric Chemistry and Physics 20 7 4167 4191 |
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Open Polar |
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Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
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ftopenaccessrep |
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English |
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Atmospheric Science |
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Atmospheric Science P. Ricaud M. Del Guasta E. Bazile N. Azouz A. Lupi P. Durand J.-L. Attié D. Veron V. Guidard P. Grigioni Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
topic_facet |
Atmospheric Science |
description |
Abstract. A comprehensive analysis of the water budget over the Dome C (Concordia, Antarctica) station has been performed during the austral summer 2018–2019 as part of the Year of Polar Prediction (YOPP) international campaign. Thin (∼100 m deep) supercooled liquid water (SLW) clouds have been detected and analysed using remotely sensed observations at the station (tropospheric depolarization lidar, the H2O Antarctica Microwave Stratospheric and Tropospheric Radiometer (HAMSTRAD), net surface radiation from the Baseline Surface Radiation Network (BSRN)), radiosondes, and satellite observations (CALIOP, Cloud-Aerosol LIdar with Orthogonal Polarization/CALIPSO, Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observations) combined with a specific configuration of the numerical weather prediction model: ARPEGE-SH (Action de Recherche Petite Echelle Grande Echelle – Southern Hemisphere). The analysis shows that SLW clouds were present from November to March, with the greatest frequency occurring in December and January when ∼50 % of the days in summer time exhibited SLW clouds for at least 1 h. Two case studies are used to illustrate this phenomenon. On 24 December 2018, the atmospheric planetary boundary layer (PBL) evolved following a typical diurnal variation, which is to say with a warm and dry mixing layer at local noon thicker than the cold and dry stable layer at local midnight. Our study showed that the SLW clouds were observed at Dome C within the entrainment and the capping inversion zones at the top of the PBL. ARPEGE-SH was not able to correctly estimate the ratio between liquid and solid water inside the clouds with the liquid water path (LWP) strongly underestimated by a factor of 1000 compared to observations. The lack of simulated SLW in the model impacted the net surface radiation that was 20–30 W m−2 higher in the BSRN observations than in the ARPEGE-SH calculations, mainly attributable to the BSRN longwave downward surface radiation being 50 W m−2 greater than ... |
format |
Article in Journal/Newspaper |
author |
P. Ricaud M. Del Guasta E. Bazile N. Azouz A. Lupi P. Durand J.-L. Attié D. Veron V. Guidard P. Grigioni |
author_facet |
P. Ricaud M. Del Guasta E. Bazile N. Azouz A. Lupi P. Durand J.-L. Attié D. Veron V. Guidard P. Grigioni |
author_sort |
P. Ricaud |
title |
Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
title_short |
Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
title_full |
Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
title_fullStr |
Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
title_full_unstemmed |
Supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above Dome C, Antarctica |
title_sort |
supercooled liquid water cloud observed, analysed, and modelled at the top of the planetary boundary layer above dome c, antarctica |
publishDate |
2020 |
url |
https://www.openaccessrepository.it/record/29299 https://doi.org/10.5194/acp-20-4167-2020 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://www.openaccessrepository.it/record/29299 doi:10.5194/acp-20-4167-2020 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/acp-20-4167-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
7 |
container_start_page |
4167 |
op_container_end_page |
4191 |
_version_ |
1810487521632583680 |