Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE
International audience An interesting occurrence of a Rossby wave breaking event observed during the VORCORE experiment is presented and explained. Twenty-seven balloons were launched inside the Antarctic polar vortex. Almost all of these balloons evolved in the stratosphere around 500K within the v...
Published in: | Annales Geophysicae |
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Online Access: | https://hal.science/hal-01099070 https://hal.science/hal-01099070/document https://hal.science/hal-01099070/file/angeo-31-675-2013.pdf https://doi.org/10.5194/angeo-31-675-2013 |
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ftecoleponts:oai:HAL:hal-01099070v1 2024-09-15T17:46:41+00:00 Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE Moustaoui, M. Teitelbaum, H. Mahalov, A. School of Mathematical and Statistical Sciences (Arizona, Tempe) Arizona State University Tempe (ASU) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) 2013 https://hal.science/hal-01099070 https://hal.science/hal-01099070/document https://hal.science/hal-01099070/file/angeo-31-675-2013.pdf https://doi.org/10.5194/angeo-31-675-2013 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-31-675-2013 hal-01099070 https://hal.science/hal-01099070 https://hal.science/hal-01099070/document https://hal.science/hal-01099070/file/angeo-31-675-2013.pdf doi:10.5194/angeo-31-675-2013 info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-01099070 Annales Geophysicae, 2013, 31 (4), pp.675-687. ⟨10.5194/angeo-31-675-2013⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2013 ftecoleponts https://doi.org/10.5194/angeo-31-675-2013 2024-08-13T23:47:28Z International audience An interesting occurrence of a Rossby wave breaking event observed during the VORCORE experiment is presented and explained. Twenty-seven balloons were launched inside the Antarctic polar vortex. Almost all of these balloons evolved in the stratosphere around 500K within the vortex, except the one launched on 28 October 2005. In this case, the balloon was caught within a tongue of high potential vorticity (PV), and was ejected from the polar vortex. The evolution of this event is studied for the period between 19 and 25 November 2005. It is found that at the beginning of this period, the polar vortex experienced distortions due to the presence of Rossby waves. Then, these waves break and a tongue of high PV develops. On 25 November, the tongue became separated from the vortex and the balloon was ejected into the surf zone. Lagrangian simulations demonstrate that the air masses surrounding the balloon after its ejection were originating from the vortex edge. The wave breaking and the development of the tongue are confined within a region where a planetary Quasi-Stationary Wave 1 (QSW1) induces wind speeds with weaker values. The QSW1 causes asymmetry in the wind speed and the horizontal PV gradient along the edge of the polar vortex, resulting in a localized jet. Rossby waves with smaller scales propagating on top of this jet amplify as they enter the jet exit region and then break. The role of the QSW1 on the formation of the weak flow conditions that caused the non-linear wave breaking observed near the vortex edge is confirmed by three-dimensional numerical simulations using forcing with and without the contribution of the QSW1. © Author(s) 2013. Article in Journal/Newspaper Antarc* Antarctic École des Ponts ParisTech: HAL Annales Geophysicae 31 4 675 687 |
institution |
Open Polar |
collection |
École des Ponts ParisTech: HAL |
op_collection_id |
ftecoleponts |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Moustaoui, M. Teitelbaum, H. Mahalov, A. Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience An interesting occurrence of a Rossby wave breaking event observed during the VORCORE experiment is presented and explained. Twenty-seven balloons were launched inside the Antarctic polar vortex. Almost all of these balloons evolved in the stratosphere around 500K within the vortex, except the one launched on 28 October 2005. In this case, the balloon was caught within a tongue of high potential vorticity (PV), and was ejected from the polar vortex. The evolution of this event is studied for the period between 19 and 25 November 2005. It is found that at the beginning of this period, the polar vortex experienced distortions due to the presence of Rossby waves. Then, these waves break and a tongue of high PV develops. On 25 November, the tongue became separated from the vortex and the balloon was ejected into the surf zone. Lagrangian simulations demonstrate that the air masses surrounding the balloon after its ejection were originating from the vortex edge. The wave breaking and the development of the tongue are confined within a region where a planetary Quasi-Stationary Wave 1 (QSW1) induces wind speeds with weaker values. The QSW1 causes asymmetry in the wind speed and the horizontal PV gradient along the edge of the polar vortex, resulting in a localized jet. Rossby waves with smaller scales propagating on top of this jet amplify as they enter the jet exit region and then break. The role of the QSW1 on the formation of the weak flow conditions that caused the non-linear wave breaking observed near the vortex edge is confirmed by three-dimensional numerical simulations using forcing with and without the contribution of the QSW1. © Author(s) 2013. |
author2 |
School of Mathematical and Statistical Sciences (Arizona, Tempe) Arizona State University Tempe (ASU) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Moustaoui, M. Teitelbaum, H. Mahalov, A. |
author_facet |
Moustaoui, M. Teitelbaum, H. Mahalov, A. |
author_sort |
Moustaoui, M. |
title |
Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
title_short |
Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
title_full |
Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
title_fullStr |
Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
title_full_unstemmed |
Observation and simulation of wave breaking in the southern hemispheric stratosphere during VORCORE |
title_sort |
observation and simulation of wave breaking in the southern hemispheric stratosphere during vorcore |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-01099070 https://hal.science/hal-01099070/document https://hal.science/hal-01099070/file/angeo-31-675-2013.pdf https://doi.org/10.5194/angeo-31-675-2013 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-01099070 Annales Geophysicae, 2013, 31 (4), pp.675-687. ⟨10.5194/angeo-31-675-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-31-675-2013 hal-01099070 https://hal.science/hal-01099070 https://hal.science/hal-01099070/document https://hal.science/hal-01099070/file/angeo-31-675-2013.pdf doi:10.5194/angeo-31-675-2013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/angeo-31-675-2013 |
container_title |
Annales Geophysicae |
container_volume |
31 |
container_issue |
4 |
container_start_page |
675 |
op_container_end_page |
687 |
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1810495000764481536 |