Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX
International audience The dynamical and microphysical properties of a well-observed cyclone from the North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX), called the Stalactite cyclone and corresponding to intensive observa- tion period 6, is examined using two atmospheric compo- nent...
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ftsorbonneuniv:oai:HAL:insu-03183467v1 2024-09-15T18:24:23+00:00 Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX Flack, David L. A. Rivière, Gwendal Musat, Ionela Roehrig, Romain Bony, Sandrine Delanoë, Julien Cazenave, Quitterie Pelon, Jacques ANR-17-CE01-0010,DIP-NAWDEX,Processus diabatiques pendant la campagne NAWDEX(2017) 2021-03-22 https://insu.hal.science/insu-03183467 https://insu.hal.science/insu-03183467/document https://insu.hal.science/insu-03183467/file/wcd-2-233-2021.pdf https://doi.org/10.5194/wcd-2-233-2021 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/wcd-2-233-2021 insu-03183467 https://insu.hal.science/insu-03183467 https://insu.hal.science/insu-03183467/document https://insu.hal.science/insu-03183467/file/wcd-2-233-2021.pdf doi:10.5194/wcd-2-233-2021 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 2698-4016 Weather and Climate Dynamics https://insu.hal.science/insu-03183467 Weather and Climate Dynamics, 2021, 2, pp.233 - 253. ⟨10.5194/wcd-2-233-2021⟩ [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 2021 ftsorbonneuniv https://doi.org/10.5194/wcd-2-233-2021 2024-07-25T23:47:55Z International audience The dynamical and microphysical properties of a well-observed cyclone from the North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX), called the Stalactite cyclone and corresponding to intensive observa- tion period 6, is examined using two atmospheric compo- nents (ARPEGE-Climat 6.3 and LMDZ6A) of the global cli- mate models CNRM-CM6-1 and IPSL-CM6A, respectively. The hindcasts are performed in “weather forecast mode”, run at approximately 150–200 km (low resolution, LR) and ap- proximately 50 km (high resolution, HR) grid spacings, and initialised during the initiation stage of the cyclone. Cyclo- genesis results from the merging of two relative vorticity maxima at low levels: one associated with a diabatic Rossby vortex (DRV) and the other initiated by baroclinic interac- tion with a pre-existing upper-level potential vorticity (PV) cut-off. All hindcasts produce (to some extent) a DRV. How- ever, the second vorticity maximum is almost absent in LR hindcasts because of an underestimated upper-level PV cut- off. The evolution of the cyclone is examined via the quasi- geostrophic ω equation which separates the diabatic heat- ing component from the dynamical one. In contrast to some previous studies, there is no change in the relative impor- tance of diabatic heating with increased resolution. The anal- ysis shows that LMDZ6A produces stronger diabatic heat- ing compared to ARPEGE-Climat 6.3. Hindcasts initialised during the mature stage of the cyclone are compared withairborne remote-sensing measurements. There is an under- estimation of the ice water content in the model compared to the one retrieved from radar-lidar measurements. Consis- tent with the increased heating rate in LMDZ6A compared to ARPEGE-Climat 6.3, the sum of liquid and ice water con- tents is higher in LMDZ6A than ARPEGE-Climat 6.3 and, in that sense, LMDZ6A is closer to the observations. How- ever, LMDZ6A strongly overestimates the fraction of super- cooled liquid compared to the observations by a factor ... Article in Journal/Newspaper North Atlantic HAL Sorbonne Université Weather and Climate Dynamics 2 1 233 253 |
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 Flack, David L. A. Rivière, Gwendal Musat, Ionela Roehrig, Romain Bony, Sandrine Delanoë, Julien Cazenave, Quitterie Pelon, Jacques Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
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 The dynamical and microphysical properties of a well-observed cyclone from the North Atlantic Waveguide and Downstream Impact Experiment (NAWDEX), called the Stalactite cyclone and corresponding to intensive observa- tion period 6, is examined using two atmospheric compo- nents (ARPEGE-Climat 6.3 and LMDZ6A) of the global cli- mate models CNRM-CM6-1 and IPSL-CM6A, respectively. The hindcasts are performed in “weather forecast mode”, run at approximately 150–200 km (low resolution, LR) and ap- proximately 50 km (high resolution, HR) grid spacings, and initialised during the initiation stage of the cyclone. Cyclo- genesis results from the merging of two relative vorticity maxima at low levels: one associated with a diabatic Rossby vortex (DRV) and the other initiated by baroclinic interac- tion with a pre-existing upper-level potential vorticity (PV) cut-off. All hindcasts produce (to some extent) a DRV. How- ever, the second vorticity maximum is almost absent in LR hindcasts because of an underestimated upper-level PV cut- off. The evolution of the cyclone is examined via the quasi- geostrophic ω equation which separates the diabatic heat- ing component from the dynamical one. In contrast to some previous studies, there is no change in the relative impor- tance of diabatic heating with increased resolution. The anal- ysis shows that LMDZ6A produces stronger diabatic heat- ing compared to ARPEGE-Climat 6.3. Hindcasts initialised during the mature stage of the cyclone are compared withairborne remote-sensing measurements. There is an under- estimation of the ice water content in the model compared to the one retrieved from radar-lidar measurements. Consis- tent with the increased heating rate in LMDZ6A compared to ARPEGE-Climat 6.3, the sum of liquid and ice water con- tents is higher in LMDZ6A than ARPEGE-Climat 6.3 and, in that sense, LMDZ6A is closer to the observations. How- ever, LMDZ6A strongly overestimates the fraction of super- cooled liquid compared to the observations by a factor ... |
author2 |
ANR-17-CE01-0010,DIP-NAWDEX,Processus diabatiques pendant la campagne NAWDEX(2017) |
format |
Article in Journal/Newspaper |
author |
Flack, David L. A. Rivière, Gwendal Musat, Ionela Roehrig, Romain Bony, Sandrine Delanoë, Julien Cazenave, Quitterie Pelon, Jacques |
author_facet |
Flack, David L. A. Rivière, Gwendal Musat, Ionela Roehrig, Romain Bony, Sandrine Delanoë, Julien Cazenave, Quitterie Pelon, Jacques |
author_sort |
Flack, David L. A. |
title |
Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
title_short |
Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
title_full |
Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
title_fullStr |
Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
title_full_unstemmed |
Representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during NAWDEX |
title_sort |
representation by two climate models of the dynamical and diabatic processes involved in the development of an explosively deepening cyclone during nawdex |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03183467 https://insu.hal.science/insu-03183467/document https://insu.hal.science/insu-03183467/file/wcd-2-233-2021.pdf https://doi.org/10.5194/wcd-2-233-2021 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2698-4016 Weather and Climate Dynamics https://insu.hal.science/insu-03183467 Weather and Climate Dynamics, 2021, 2, pp.233 - 253. ⟨10.5194/wcd-2-233-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/wcd-2-233-2021 insu-03183467 https://insu.hal.science/insu-03183467 https://insu.hal.science/insu-03183467/document https://insu.hal.science/insu-03183467/file/wcd-2-233-2021.pdf doi:10.5194/wcd-2-233-2021 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/wcd-2-233-2021 |
container_title |
Weather and Climate Dynamics |
container_volume |
2 |
container_issue |
1 |
container_start_page |
233 |
op_container_end_page |
253 |
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1810464719628140544 |