Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign
Ideas from dynamical systems theory have been used in an observational field campaign in the Southern Ocean to provide information on the mixing structure of the flow. Instantaneous snapshops of data from satellite altimetry provide information concerning surface currents at a scale of 100 km or so....
Main Author: | |
---|---|
Other Authors: | , , , |
Format: | Book Part |
Language: | unknown |
Published: |
AIP
2012
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/517363/ https://legacy.bas.ac.uk/staff-profiles/webspace/emsh/pubs/APC000650.pdf |
id |
ftnerc:oai:nora.nerc.ac.uk:517363 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:517363 2023-05-15T13:49:34+02:00 Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign Shuckburgh, Emily F. Simos, TE Psihoyios, G Tsitouras, C Anastassi, Z 2012-09 http://nora.nerc.ac.uk/id/eprint/517363/ https://legacy.bas.ac.uk/staff-profiles/webspace/emsh/pubs/APC000650.pdf unknown AIP Shuckburgh, Emily F. orcid:0000-0001-9206-3444 . 2012 Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign. In: Simos, TE; Psihoyios, G; Tsitouras, C; Anastassi, Z, (eds.) ICNAAM 2012: International Conference of Numerical Analysis and Applied Mathematics. AIP, 650-653. Publication - Book Section PeerReviewed 2012 ftnerc 2023-02-04T19:45:06Z Ideas from dynamical systems theory have been used in an observational field campaign in the Southern Ocean to provide information on the mixing structure of the flow. Instantaneous snapshops of data from satellite altimetry provide information concerning surface currents at a scale of 100 km or so. We show that by using time-series of satellite altimetry we are able to deduce reliable information about the structure of the surface flow at scales as small as 10 km or so. This information was used in near-real time to provide an estimate of the location of stable and unstable manifolds in the vicinity of the Antarctic Circumpolar Current. As part of a large U.K./U.S. observational field campaign (DIMES: Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean) a number of drifters and floats were then released (at the surface and at a depth of approximately 1 km) close to the estimated hyperbolic point at the intersection of the two manifolds, in several locations with apparently different dynamical characteristics. The subsequent trajectories of the drifters/floats has allowed the unstable manifolds to be tracked, and the relative separation of pairs of floats has allowed an estimation of Lyapunov exponents. The results of these deployments have given insight into the strengths and limitations of the satellite data which does not resolve small scales in the velocity field, and have elucidated the transport and mixing structure of the Southern Ocean at the surface and at depth. Book Part Antarc* Antarctic Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Ideas from dynamical systems theory have been used in an observational field campaign in the Southern Ocean to provide information on the mixing structure of the flow. Instantaneous snapshops of data from satellite altimetry provide information concerning surface currents at a scale of 100 km or so. We show that by using time-series of satellite altimetry we are able to deduce reliable information about the structure of the surface flow at scales as small as 10 km or so. This information was used in near-real time to provide an estimate of the location of stable and unstable manifolds in the vicinity of the Antarctic Circumpolar Current. As part of a large U.K./U.S. observational field campaign (DIMES: Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean) a number of drifters and floats were then released (at the surface and at a depth of approximately 1 km) close to the estimated hyperbolic point at the intersection of the two manifolds, in several locations with apparently different dynamical characteristics. The subsequent trajectories of the drifters/floats has allowed the unstable manifolds to be tracked, and the relative separation of pairs of floats has allowed an estimation of Lyapunov exponents. The results of these deployments have given insight into the strengths and limitations of the satellite data which does not resolve small scales in the velocity field, and have elucidated the transport and mixing structure of the Southern Ocean at the surface and at depth. |
author2 |
Simos, TE Psihoyios, G Tsitouras, C Anastassi, Z |
format |
Book Part |
author |
Shuckburgh, Emily F. |
spellingShingle |
Shuckburgh, Emily F. Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
author_facet |
Shuckburgh, Emily F. |
author_sort |
Shuckburgh, Emily F. |
title |
Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
title_short |
Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
title_full |
Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
title_fullStr |
Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
title_full_unstemmed |
Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign |
title_sort |
mapping unstable manifolds using drifters/floats in a southern ocean field campaign |
publisher |
AIP |
publishDate |
2012 |
url |
http://nora.nerc.ac.uk/id/eprint/517363/ https://legacy.bas.ac.uk/staff-profiles/webspace/emsh/pubs/APC000650.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
Shuckburgh, Emily F. orcid:0000-0001-9206-3444 . 2012 Mapping unstable manifolds using drifters/floats in a Southern Ocean field campaign. In: Simos, TE; Psihoyios, G; Tsitouras, C; Anastassi, Z, (eds.) ICNAAM 2012: International Conference of Numerical Analysis and Applied Mathematics. AIP, 650-653. |
_version_ |
1766251669894463488 |