Antarctic clouds, supercooled liquid water and mixed phase, investigated with DARDAR: geographical and seasonal variations
International audience Antarctic tropospheric clouds are investigated using the DARDAR (raDAR/liDAR)-MASK products between 60 and 82 • S. The cloud fraction (occurrence frequency) is divided into the supercooled liquid-water-containing cloud (SLC) fraction and its complementary part called the all-i...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-02136183 https://insu.hal.science/insu-02136183/document https://insu.hal.science/insu-02136183/file/acp-19-6771-2019.pdf https://doi.org/10.5194/acp-19-6771-2019 |
id |
ftinsu:oai:HAL:insu-02136183v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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, C. 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 DARDAR (raDAR/liDAR)-MASK products between 60 and 82 • S. The cloud fraction (occurrence frequency) is divided into the supercooled liquid-water-containing cloud (SLC) fraction and its complementary part called the all-ice cloud fraction. A further distinction is made between SLC involving ice (mixed-phase clouds, MPC) or not (USLC, for unglaciated SLC). The low-level (< 3 km above surface level) SLC fraction is larger over seas (20 %-60 %), where it varies according to sea ice fraction, than over continental regions (0 %-35 %). The total SLC fraction is much larger over West Antarctica (10 %-40 %) than it is over the Antarctic Plateau (0 %-10 %). In East Antarctica the total SLC fraction-in summer for instance-decreases sharply pole-wards with increasing surface height (decreasing temperatures) from 40 % at the coast to < 5% at 82 • S on the plateau. The geographical distribution of the continental total all-ice fraction is shaped by the interaction of the main low-pressure systems surrounding the continent and the orography, with little association with the sea ice fraction. Opportunistic comparisons with published ground-based supercooled liquid-water observations at the South Pole in 2009 are made with our SLC fractions at 82 • S in terms of seasonal variability, showing good agreement. We demonstrate that the largest impact of sea ice on the low-level SLC fraction (and mostly through the MPC) occurs in autumn and winter (22 % and 18 % absolute decrease in the fraction between open water and sea ice-covered regions, respectively), while it is almost null in summer and intermediate in spring (11 %). Monthly variability of the MPC fraction over seas shows a maximum at the end of summer and a minimum in winter. Conversely, the USLC fraction has a maximum at the beginning of summer. However, monthly evolutions of MPC and USLC fractions do not differ on the continent. This suggests a seasonal-ity in the glaciation process in ... |
author2 |
SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (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, C. |
author_facet |
Listowski, Constantino Delanoë, Julien Kirchgaessner, Amélie Lachlan-Cope, Tom King, John, C. |
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 |
2019 |
url |
https://insu.hal.science/insu-02136183 https://insu.hal.science/insu-02136183/document https://insu.hal.science/insu-02136183/file/acp-19-6771-2019.pdf https://doi.org/10.5194/acp-19-6771-2019 |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice South pole South pole West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice South pole South pole West Antarctica |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-02136183 Atmospheric Chemistry and Physics, 2019, 19 (10), pp.6771-6808. ⟨10.5194/acp-19-6771-2019⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-19-6771-2019 insu-02136183 https://insu.hal.science/insu-02136183 https://insu.hal.science/insu-02136183/document https://insu.hal.science/insu-02136183/file/acp-19-6771-2019.pdf doi:10.5194/acp-19-6771-2019 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/acp-19-6771-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
10 |
container_start_page |
6771 |
op_container_end_page |
6808 |
_version_ |
1781704002030796800 |
spelling |
ftinsu:oai:HAL:insu-02136183v1 2023-11-05T03:34:18+01:00 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, C. SPACE - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2019 https://insu.hal.science/insu-02136183 https://insu.hal.science/insu-02136183/document https://insu.hal.science/insu-02136183/file/acp-19-6771-2019.pdf https://doi.org/10.5194/acp-19-6771-2019 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/acp-19-6771-2019 insu-02136183 https://insu.hal.science/insu-02136183 https://insu.hal.science/insu-02136183/document https://insu.hal.science/insu-02136183/file/acp-19-6771-2019.pdf doi:10.5194/acp-19-6771-2019 info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://insu.hal.science/insu-02136183 Atmospheric Chemistry and Physics, 2019, 19 (10), pp.6771-6808. ⟨10.5194/acp-19-6771-2019⟩ [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 2019 ftinsu https://doi.org/10.5194/acp-19-6771-2019 2023-10-11T16:37:35Z International audience Antarctic tropospheric clouds are investigated using the DARDAR (raDAR/liDAR)-MASK products between 60 and 82 • S. The cloud fraction (occurrence frequency) is divided into the supercooled liquid-water-containing cloud (SLC) fraction and its complementary part called the all-ice cloud fraction. A further distinction is made between SLC involving ice (mixed-phase clouds, MPC) or not (USLC, for unglaciated SLC). The low-level (< 3 km above surface level) SLC fraction is larger over seas (20 %-60 %), where it varies according to sea ice fraction, than over continental regions (0 %-35 %). The total SLC fraction is much larger over West Antarctica (10 %-40 %) than it is over the Antarctic Plateau (0 %-10 %). In East Antarctica the total SLC fraction-in summer for instance-decreases sharply pole-wards with increasing surface height (decreasing temperatures) from 40 % at the coast to < 5% at 82 • S on the plateau. The geographical distribution of the continental total all-ice fraction is shaped by the interaction of the main low-pressure systems surrounding the continent and the orography, with little association with the sea ice fraction. Opportunistic comparisons with published ground-based supercooled liquid-water observations at the South Pole in 2009 are made with our SLC fractions at 82 • S in terms of seasonal variability, showing good agreement. We demonstrate that the largest impact of sea ice on the low-level SLC fraction (and mostly through the MPC) occurs in autumn and winter (22 % and 18 % absolute decrease in the fraction between open water and sea ice-covered regions, respectively), while it is almost null in summer and intermediate in spring (11 %). Monthly variability of the MPC fraction over seas shows a maximum at the end of summer and a minimum in winter. Conversely, the USLC fraction has a maximum at the beginning of summer. However, monthly evolutions of MPC and USLC fractions do not differ on the continent. This suggests a seasonal-ity in the glaciation process in ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice South pole South pole West Antarctica Institut national des sciences de l'Univers: HAL-INSU Atmospheric Chemistry and Physics 19 10 6771 6808 |