Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex
In this paper we study the three-dimensional (3-D) Lagrangian structures in the stratospheric polar vortex (SPV) above Antarctica. We analyse and visualize these structures using Lagrangian descriptor function M . The procedure for calculation with reanalysis data is explained. Benchmarks are comput...
Published in: | Nonlinear Processes in Geophysics |
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ftcopernicus:oai:publications.copernicus.org:npg57320 2023-05-15T13:54:27+02:00 Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex Curbelo, Jezabel García-Garrido, Víctor José Mechoso, Carlos Roberto Mancho, Ana Maria Wiggins, Stephen Niang, Coumba 2018-09-20 application/pdf https://doi.org/10.5194/npg-24-379-2017 https://npg.copernicus.org/articles/24/379/2017/ eng eng doi:10.5194/npg-24-379-2017 https://npg.copernicus.org/articles/24/379/2017/ eISSN: 1607-7946 Text 2018 ftcopernicus https://doi.org/10.5194/npg-24-379-2017 2020-07-20T16:23:40Z In this paper we study the three-dimensional (3-D) Lagrangian structures in the stratospheric polar vortex (SPV) above Antarctica. We analyse and visualize these structures using Lagrangian descriptor function M . The procedure for calculation with reanalysis data is explained. Benchmarks are computed and analysed that allow us to compare 2-D and 3-D aspects of Lagrangian transport. Dynamical systems concepts appropriate to 3-D, such as normally hyperbolic invariant curves, are discussed and applied. In order to illustrate our approach we select an interval of time in which the SPV is relatively undisturbed (August 1979) and an interval of rapid SPV changes (October 1979). Our results provide new insights into the Lagrangian structure of the vertical extension of the stratospheric polar vortex and its evolution. Our results also show complex Lagrangian patterns indicative of strong mixing processes in the upper troposphere and lower stratosphere. Finally, during the transition to summer in the late spring, we illustrate the vertical structure of two counterrotating vortices, one the polar and the other an emerging one, and the invariant separatrix that divides them. Text Antarc* Antarctic Antarctica Copernicus Publications: E-Journals Antarctic The Antarctic Nonlinear Processes in Geophysics 24 3 379 392 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
In this paper we study the three-dimensional (3-D) Lagrangian structures in the stratospheric polar vortex (SPV) above Antarctica. We analyse and visualize these structures using Lagrangian descriptor function M . The procedure for calculation with reanalysis data is explained. Benchmarks are computed and analysed that allow us to compare 2-D and 3-D aspects of Lagrangian transport. Dynamical systems concepts appropriate to 3-D, such as normally hyperbolic invariant curves, are discussed and applied. In order to illustrate our approach we select an interval of time in which the SPV is relatively undisturbed (August 1979) and an interval of rapid SPV changes (October 1979). Our results provide new insights into the Lagrangian structure of the vertical extension of the stratospheric polar vortex and its evolution. Our results also show complex Lagrangian patterns indicative of strong mixing processes in the upper troposphere and lower stratosphere. Finally, during the transition to summer in the late spring, we illustrate the vertical structure of two counterrotating vortices, one the polar and the other an emerging one, and the invariant separatrix that divides them. |
format |
Text |
author |
Curbelo, Jezabel García-Garrido, Víctor José Mechoso, Carlos Roberto Mancho, Ana Maria Wiggins, Stephen Niang, Coumba |
spellingShingle |
Curbelo, Jezabel García-Garrido, Víctor José Mechoso, Carlos Roberto Mancho, Ana Maria Wiggins, Stephen Niang, Coumba Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
author_facet |
Curbelo, Jezabel García-Garrido, Víctor José Mechoso, Carlos Roberto Mancho, Ana Maria Wiggins, Stephen Niang, Coumba |
author_sort |
Curbelo, Jezabel |
title |
Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
title_short |
Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
title_full |
Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
title_fullStr |
Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
title_full_unstemmed |
Insights into the three-dimensional Lagrangian geometry of the Antarctic polar vortex |
title_sort |
insights into the three-dimensional lagrangian geometry of the antarctic polar vortex |
publishDate |
2018 |
url |
https://doi.org/10.5194/npg-24-379-2017 https://npg.copernicus.org/articles/24/379/2017/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
eISSN: 1607-7946 |
op_relation |
doi:10.5194/npg-24-379-2017 https://npg.copernicus.org/articles/24/379/2017/ |
op_doi |
https://doi.org/10.5194/npg-24-379-2017 |
container_title |
Nonlinear Processes in Geophysics |
container_volume |
24 |
container_issue |
3 |
container_start_page |
379 |
op_container_end_page |
392 |
_version_ |
1766260321583890432 |