Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models
International audience The correct representation of Antarctic clouds in atmospheric models is crucial for accurate projections of the future Antarctic climate. This is particularly true for summer clouds which play a critical role in the surface melting of the ice shelves in the vicinity of the Wed...
Published in: | Atmospheric Chemistry and Physics |
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Online Access: | https://doi.org/10.5194/acp-21-755-2021 https://hal.sorbonne-universite.fr/hal-03154111/file/acp-21-755-2021.pdf https://hal.sorbonne-universite.fr/hal-03154111 |
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fttriple:oai:gotriple.eu:10670/1.zonc19 2023-05-15T13:54:01+02:00 Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models Sotiropoulou, Georgia Vignon, Étienne Young, Gillian Morrison, Hugh O'Shea, Sebastian,, Lachlan-Cope, Thomas Berne, Alexis Nenes, Athanasios Ecole Polytechnique Fédérale de Lausanne (EPFL) Stockholm University Environmental Remote Sensing Laboratory Lausanne Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) University of Leeds National Center for Atmospheric Research Boulder (NCAR) University of New South Wales Sydney (UNSW) University of Manchester Manchester British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Foundation for Research and Technology - Hellas (FORTH) 2021-01-19 https://doi.org/10.5194/acp-21-755-2021 https://hal.sorbonne-universite.fr/hal-03154111/file/acp-21-755-2021.pdf https://hal.sorbonne-universite.fr/hal-03154111 en eng HAL CCSD European Geosciences Union hal-03154111 doi:10.5194/acp-21-755-2021 10670/1.zonc19 https://hal.sorbonne-universite.fr/hal-03154111/file/acp-21-755-2021.pdf https://hal.sorbonne-universite.fr/hal-03154111 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics Atmospheric Chemistry and Physics, European Geosciences Union, 2021, 21 (2), pp.755-771. ⟨10.5194/acp-21-755-2021⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/acp-21-755-2021 2023-01-22T16:38:01Z International audience The correct representation of Antarctic clouds in atmospheric models is crucial for accurate projections of the future Antarctic climate. This is particularly true for summer clouds which play a critical role in the surface melting of the ice shelves in the vicinity of the Weddell Sea. The pristine atmosphere over the Antarctic coast is characterized by low concentrations of ice nucleating particles (INPs) which often result in the formation of supercooled liquid clouds. However, when ice formation occurs, the ice crystal number concentrations (ICNCs) are substantially higher than those predicted by existing primary ice nucleation parameterizations. The rime-splintering mechanism, thought to be the dominant secondary ice production (SIP) mechanism at temperatures between −8 and −3 ∘C, is also weak in the Weather and Research Forecasting model. Including a parameterization for SIP due to breakup (BR) from collisions between ice particles improves the ICNC representation in the modeled mixed-phase clouds, suggesting that BR could account for the enhanced ICNCs often found in Antarctic clouds. The model results indicate that a minimum concentration of about ∼ 0.1 L−1 of primary ice crystals is necessary and sufficient to initiate significant breakup to explain the observations, while our findings show little sensitivity to increasing INPs. The BR mechanism is currently not represented in most weather prediction and climate models; including this process can have a significant impact on the Antarctic radiation budget. Article in Journal/Newspaper Antarc* Antarctic Ice Shelves Weddell Sea Unknown Antarctic Rime ENVELOPE(6.483,6.483,62.567,62.567) The Antarctic Weddell Weddell Sea Atmospheric Chemistry and Physics 21 2 755 771 |
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English |
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geo envir Sotiropoulou, Georgia Vignon, Étienne Young, Gillian Morrison, Hugh O'Shea, Sebastian,, Lachlan-Cope, Thomas Berne, Alexis Nenes, Athanasios Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
topic_facet |
geo envir |
description |
International audience The correct representation of Antarctic clouds in atmospheric models is crucial for accurate projections of the future Antarctic climate. This is particularly true for summer clouds which play a critical role in the surface melting of the ice shelves in the vicinity of the Weddell Sea. The pristine atmosphere over the Antarctic coast is characterized by low concentrations of ice nucleating particles (INPs) which often result in the formation of supercooled liquid clouds. However, when ice formation occurs, the ice crystal number concentrations (ICNCs) are substantially higher than those predicted by existing primary ice nucleation parameterizations. The rime-splintering mechanism, thought to be the dominant secondary ice production (SIP) mechanism at temperatures between −8 and −3 ∘C, is also weak in the Weather and Research Forecasting model. Including a parameterization for SIP due to breakup (BR) from collisions between ice particles improves the ICNC representation in the modeled mixed-phase clouds, suggesting that BR could account for the enhanced ICNCs often found in Antarctic clouds. The model results indicate that a minimum concentration of about ∼ 0.1 L−1 of primary ice crystals is necessary and sufficient to initiate significant breakup to explain the observations, while our findings show little sensitivity to increasing INPs. The BR mechanism is currently not represented in most weather prediction and climate models; including this process can have a significant impact on the Antarctic radiation budget. |
author2 |
Ecole Polytechnique Fédérale de Lausanne (EPFL) Stockholm University Environmental Remote Sensing Laboratory Lausanne Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) University of Leeds National Center for Atmospheric Research Boulder (NCAR) University of New South Wales Sydney (UNSW) University of Manchester Manchester British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Foundation for Research and Technology - Hellas (FORTH) |
format |
Article in Journal/Newspaper |
author |
Sotiropoulou, Georgia Vignon, Étienne Young, Gillian Morrison, Hugh O'Shea, Sebastian,, Lachlan-Cope, Thomas Berne, Alexis Nenes, Athanasios |
author_facet |
Sotiropoulou, Georgia Vignon, Étienne Young, Gillian Morrison, Hugh O'Shea, Sebastian,, Lachlan-Cope, Thomas Berne, Alexis Nenes, Athanasios |
author_sort |
Sotiropoulou, Georgia |
title |
Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
title_short |
Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
title_full |
Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
title_fullStr |
Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
title_full_unstemmed |
Secondary ice production in summer clouds over the Antarctic coast: an underappreciated process in atmospheric models |
title_sort |
secondary ice production in summer clouds over the antarctic coast: an underappreciated process in atmospheric models |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-755-2021 https://hal.sorbonne-universite.fr/hal-03154111/file/acp-21-755-2021.pdf https://hal.sorbonne-universite.fr/hal-03154111 |
long_lat |
ENVELOPE(6.483,6.483,62.567,62.567) |
geographic |
Antarctic Rime The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Rime The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Shelves Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Shelves Weddell Sea |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics Atmospheric Chemistry and Physics, European Geosciences Union, 2021, 21 (2), pp.755-771. ⟨10.5194/acp-21-755-2021⟩ |
op_relation |
hal-03154111 doi:10.5194/acp-21-755-2021 10670/1.zonc19 https://hal.sorbonne-universite.fr/hal-03154111/file/acp-21-755-2021.pdf https://hal.sorbonne-universite.fr/hal-03154111 |
op_rights |
other |
op_doi |
https://doi.org/10.5194/acp-21-755-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
2 |
container_start_page |
755 |
op_container_end_page |
771 |
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1766259516276473856 |