Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations
International audience Antarctic tropospheric clouds are investigated using the radar-lidar DARDAR (raDAR/liDAR)-MASK products. The cloud fraction is divided into the supercooled liquid water (SLW)-containing clouds and the all-ice clouds. The low-level SLW fraction varies according to temperature a...
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ftsorbonneuniv:oai:HAL:insu-01960030v1 2023-05-15T13:48:55+02:00 Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations Listowski, Constantino Delanoë, Julien Kirchgaessner, Amélie Lachlan-Cope, Tom King, John SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2018 https://hal-insu.archives-ouvertes.fr/insu-01960030 https://doi.org/10.5194/acp-2018-1222 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2018-1222 insu-01960030 https://hal-insu.archives-ouvertes.fr/insu-01960030 doi:10.5194/acp-2018-1222 ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal-insu.archives-ouvertes.fr/insu-01960030 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2018, pp.(Under Review). ⟨10.5194/acp-2018-1222⟩ [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology info:eu-repo/semantics/article Journal articles 2018 ftsorbonneuniv https://doi.org/10.5194/acp-2018-1222 2022-01-02T21:27:43Z International audience Antarctic tropospheric clouds are investigated using the radar-lidar DARDAR (raDAR/liDAR)-MASK products. The cloud fraction is divided into the supercooled liquid water (SLW)-containing clouds and the all-ice clouds. The low-level SLW fraction varies according to temperature and sea ice fraction. It is the largest over water. In East Antarctica, the SLW fraction decreases sharply polewards. It is twice to three times higher in West Antarctica. The all-ice cloud geographical distribution is shaped by the interaction of the main low-pressure systems surrounding the continent and the orography, with little links with sea ice fraction. We demonstrate the largest impact of sea ice on SLW (mostly mixed-phase clouds, MPC) in autumn and winter, while it is almost null in summer and intermediate in spring. Monthly variability of MPC shows a maximum fraction at the end of summer and minimum in winter. Conversely, the unglaciated (pure) SLW (USLW) fraction has a maximum at the beginning of summer. Monthly evolutions of MPC and USLW fractions do not differ on the continent. This demonstrates a seasonality in the glaciation process in marine liquid-bearing clouds. From the literature, we identify the pattern of the monthly evolution of the MPC fraction as being similar to the one of the aerosols, which is related to marine biological activity. Marine bioaerosols are known to be efficient Ice Nucleating Particles (INPs). The emission of these INPs into the atmosphere from open waters would come on top of the temperature and sea ice fraction seasonalities as factors explaining the mixed-phase clouds monthly evolution. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice West Antarctica HAL Sorbonne Université Antarctic East Antarctica West Antarctica |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology Listowski, Constantino Delanoë, Julien Kirchgaessner, Amélie Lachlan-Cope, Tom King, John Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology |
description |
International audience Antarctic tropospheric clouds are investigated using the radar-lidar DARDAR (raDAR/liDAR)-MASK products. The cloud fraction is divided into the supercooled liquid water (SLW)-containing clouds and the all-ice clouds. The low-level SLW fraction varies according to temperature and sea ice fraction. It is the largest over water. In East Antarctica, the SLW fraction decreases sharply polewards. It is twice to three times higher in West Antarctica. The all-ice cloud geographical distribution is shaped by the interaction of the main low-pressure systems surrounding the continent and the orography, with little links with sea ice fraction. We demonstrate the largest impact of sea ice on SLW (mostly mixed-phase clouds, MPC) in autumn and winter, while it is almost null in summer and intermediate in spring. Monthly variability of MPC shows a maximum fraction at the end of summer and minimum in winter. Conversely, the unglaciated (pure) SLW (USLW) fraction has a maximum at the beginning of summer. Monthly evolutions of MPC and USLW fractions do not differ on the continent. This demonstrates a seasonality in the glaciation process in marine liquid-bearing clouds. From the literature, we identify the pattern of the monthly evolution of the MPC fraction as being similar to the one of the aerosols, which is related to marine biological activity. Marine bioaerosols are known to be efficient Ice Nucleating Particles (INPs). The emission of these INPs into the atmosphere from open waters would come on top of the temperature and sea ice fraction seasonalities as factors explaining the mixed-phase clouds monthly evolution. |
author2 |
SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Listowski, Constantino Delanoë, Julien Kirchgaessner, Amélie Lachlan-Cope, Tom King, John |
author_facet |
Listowski, Constantino Delanoë, Julien Kirchgaessner, Amélie Lachlan-Cope, Tom King, John |
author_sort |
Listowski, Constantino |
title |
Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
title_short |
Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
title_full |
Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
title_fullStr |
Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
title_full_unstemmed |
Antarctic clouds, supercooled liquid water and mixed-phase investigated with DARDAR: geographical and seasonal variations |
title_sort |
antarctic clouds, supercooled liquid water and mixed-phase investigated with dardar: geographical and seasonal variations |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01960030 https://doi.org/10.5194/acp-2018-1222 |
geographic |
Antarctic East Antarctica West Antarctica |
geographic_facet |
Antarctic East Antarctica West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice West Antarctica |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal-insu.archives-ouvertes.fr/insu-01960030 Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2018, pp.(Under Review). ⟨10.5194/acp-2018-1222⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-2018-1222 insu-01960030 https://hal-insu.archives-ouvertes.fr/insu-01960030 doi:10.5194/acp-2018-1222 |
op_doi |
https://doi.org/10.5194/acp-2018-1222 |
_version_ |
1766249976977948672 |