The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective
International audience Atmospheric mid-latitude circulation is dominated by a zonal, westerly flow. Such a flow is generally symmetric, but it can be occasionally broken up by blocking anticyclones. The subsequent asymmetric flow can persist for several days. In this paper, we apply new mathematical...
Published in: | Climate Dynamics |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.science/hal-01136648 https://hal.science/hal-01136648v2/document https://hal.science/hal-01136648v2/file/Farandaetal_Blocking_rev1409.pdf https://doi.org/10.1007/s00382-015-2921-6 |
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ftuniparissaclay:oai:HAL:hal-01136648v2 |
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institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
Blocking index Mid-latitude circulation Extremal index [SDE.MCG]Environmental Sciences/Global Changes [NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD] [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS] |
spellingShingle |
Blocking index Mid-latitude circulation Extremal index [SDE.MCG]Environmental Sciences/Global Changes [NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD] [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS] Faranda, Davide Masato, Giacomo Moloney, Nicholas Sato, Yuzuru Daviaud, François Dubrulle, Bérengère Yiou, Pascal The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
topic_facet |
Blocking index Mid-latitude circulation Extremal index [SDE.MCG]Environmental Sciences/Global Changes [NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD] [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS] |
description |
International audience Atmospheric mid-latitude circulation is dominated by a zonal, westerly flow. Such a flow is generally symmetric, but it can be occasionally broken up by blocking anticyclones. The subsequent asymmetric flow can persist for several days. In this paper, we apply new mathematical tools based on the computation of an extremal index in order to reexamine the dynamical mechanisms responsible for the transitions between zonal and blocked flows. We discard the claim that mid-latitude circulation features two distinct stable equilibria or chaotic regimes, in favor of a simpler mechanism that is well understood in dynamical systems theory: we identify the blocked flow as an unstable fixed point (or saddle point) of a single basin chaotic attractor, dominated by the westerlies regime. We also analyze the North Atlantic Oscillation and the Arctic Oscillation atmospheric indices, whosebehavior is often associated with the transition between the two circulation regimes, and investigate analogies and differences with the bidimensional blocking indices. We find that the Arctic Oscillation index, which can be thought as a proxy for a hemispheric average of the Tibaldi-Molteni blocking index, keeps track of the presence of unstable fixed points. On the other hand, the North Atlantic Oscillation, representative only of local properties of the North Atlantic blocking dynamics, does not show any trace of the presence of unstable fixed points of the dynamics. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Meteorology Reading University of Reading (UOR) London Mathematical Laboratory Hokkaido University Sapporo, Japan Service de physique de l'état condensé (SPEC - UMR3680) Institut Rayonnement Matière de Saclay (DRF) (IRAMIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) European Project: 338965,EC:FP7:ERC,ERC-2013-ADG,A2C2(2014) |
format |
Article in Journal/Newspaper |
author |
Faranda, Davide Masato, Giacomo Moloney, Nicholas Sato, Yuzuru Daviaud, François Dubrulle, Bérengère Yiou, Pascal |
author_facet |
Faranda, Davide Masato, Giacomo Moloney, Nicholas Sato, Yuzuru Daviaud, François Dubrulle, Bérengère Yiou, Pascal |
author_sort |
Faranda, Davide |
title |
The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
title_short |
The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
title_full |
The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
title_fullStr |
The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
title_full_unstemmed |
The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
title_sort |
switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01136648 https://hal.science/hal-01136648v2/document https://hal.science/hal-01136648v2/file/Farandaetal_Blocking_rev1409.pdf https://doi.org/10.1007/s00382-015-2921-6 |
long_lat |
ENVELOPE(73.483,73.483,-53.017,-53.017) |
geographic |
Arctic Saddle Point |
geographic_facet |
Arctic Saddle Point |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01136648 Climate Dynamics, 2015, 2015 (6), pp.2921. ⟨10.1007/s00382-015-2921-6⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2921-6 info:eu-repo/grantAgreement/EC/FP7/338965/EU/Atmospheric flow Analogues and Climate Change/A2C2 hal-01136648 https://hal.science/hal-01136648 https://hal.science/hal-01136648v2/document https://hal.science/hal-01136648v2/file/Farandaetal_Blocking_rev1409.pdf doi:10.1007/s00382-015-2921-6 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00382-015-2921-6 |
container_title |
Climate Dynamics |
container_volume |
47 |
container_issue |
5-6 |
container_start_page |
1587 |
op_container_end_page |
1599 |
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1812174735425929216 |
spelling |
ftuniparissaclay:oai:HAL:hal-01136648v2 2024-10-06T13:46:24+00:00 The switching between zonal and blocked mid-latitude atmospheric circulation: a dynamical system perspective Faranda, Davide Masato, Giacomo Moloney, Nicholas Sato, Yuzuru Daviaud, François Dubrulle, Bérengère Yiou, Pascal Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Extrèmes : Statistiques, Impacts et Régionalisation (ESTIMR) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Meteorology Reading University of Reading (UOR) London Mathematical Laboratory Hokkaido University Sapporo, Japan Service de physique de l'état condensé (SPEC - UMR3680) Institut Rayonnement Matière de Saclay (DRF) (IRAMIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) European Project: 338965,EC:FP7:ERC,ERC-2013-ADG,A2C2(2014) 2015-11-01 https://hal.science/hal-01136648 https://hal.science/hal-01136648v2/document https://hal.science/hal-01136648v2/file/Farandaetal_Blocking_rev1409.pdf https://doi.org/10.1007/s00382-015-2921-6 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-015-2921-6 info:eu-repo/grantAgreement/EC/FP7/338965/EU/Atmospheric flow Analogues and Climate Change/A2C2 hal-01136648 https://hal.science/hal-01136648 https://hal.science/hal-01136648v2/document https://hal.science/hal-01136648v2/file/Farandaetal_Blocking_rev1409.pdf doi:10.1007/s00382-015-2921-6 info:eu-repo/semantics/OpenAccess ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01136648 Climate Dynamics, 2015, 2015 (6), pp.2921. ⟨10.1007/s00382-015-2921-6⟩ Blocking index Mid-latitude circulation Extremal index [SDE.MCG]Environmental Sciences/Global Changes [NLIN.NLIN-CD]Nonlinear Sciences [physics]/Chaotic Dynamics [nlin.CD] [MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS] info:eu-repo/semantics/article Journal articles 2015 ftuniparissaclay https://doi.org/10.1007/s00382-015-2921-6 2024-09-06T00:30:34Z International audience Atmospheric mid-latitude circulation is dominated by a zonal, westerly flow. Such a flow is generally symmetric, but it can be occasionally broken up by blocking anticyclones. The subsequent asymmetric flow can persist for several days. In this paper, we apply new mathematical tools based on the computation of an extremal index in order to reexamine the dynamical mechanisms responsible for the transitions between zonal and blocked flows. We discard the claim that mid-latitude circulation features two distinct stable equilibria or chaotic regimes, in favor of a simpler mechanism that is well understood in dynamical systems theory: we identify the blocked flow as an unstable fixed point (or saddle point) of a single basin chaotic attractor, dominated by the westerlies regime. We also analyze the North Atlantic Oscillation and the Arctic Oscillation atmospheric indices, whosebehavior is often associated with the transition between the two circulation regimes, and investigate analogies and differences with the bidimensional blocking indices. We find that the Arctic Oscillation index, which can be thought as a proxy for a hemispheric average of the Tibaldi-Molteni blocking index, keeps track of the presence of unstable fixed points. On the other hand, the North Atlantic Oscillation, representative only of local properties of the North Atlantic blocking dynamics, does not show any trace of the presence of unstable fixed points of the dynamics. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Archives ouvertes de Paris-Saclay Arctic Saddle Point ENVELOPE(73.483,73.483,-53.017,-53.017) Climate Dynamics 47 5-6 1587 1599 |