Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current
The highly complex circulation and variability in the Southern Ocean are well known to strongly affect the global climate, yet their functioning is still far from being fully understood. In this presentation we focus on mechanisms of variability of the Antarctic Circumpolar Current (ACC) induced by...
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ftuninapoliparth:oai:ricerca.uniparthenope.it:11367/32389 2024-01-28T10:01:04+01:00 Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current PIERINI, Stefano Copernicus GmbH Pierini, Stefano 2011 http://hdl.handle.net/11367/32389 eng eng country:AUT ispartofbook:Geophysical Research Abstracts, 13, 8984, eISSN 1607-7962 European Geosciences Union General Assembly http://hdl.handle.net/11367/32389 info:eu-repo/semantics/conferenceObject 2011 ftuninapoliparth 2024-01-03T17:42:40Z The highly complex circulation and variability in the Southern Ocean are well known to strongly affect the global climate, yet their functioning is still far from being fully understood. In this presentation we focus on mechanisms of variability of the Antarctic Circumpolar Current (ACC) induced by intrinsic nonlinear effects over various spatial and temporal scales. These mechanisms are identified and analyzed through the results of primitive equation ocean models. A hierarchy of models forced with steady climatological wind forcing has first been implemented for a barotropic ocean with flat bottom, with an idealized topography and with a comparable realistic bathymetry that is able to prevent a total topographic steering: in this last case the role of the bottom form drag on the dynamical balance of the ACC could be assessed. Baroclinic effects have subsequently been modeled with the Princeton Ocean Model forced with both momentum and heat fluxes in more realistic configurations. The simulations show evidence of several phenomena of intrinsic variability that are strongly sensitive to the bottom topography, viscous parameterization and background stratification. Moreover, a preliminary statistical investigation of the dynamical relationship between different regions of the ACC indicates the existence of teleconnection mechanisms in the Southern Ocean dynamics. Conference Object Antarc* Antarctic Southern Ocean Università degli Studi di Napoli "Parthenope": CINECA IRIS Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Università degli Studi di Napoli "Parthenope": CINECA IRIS |
op_collection_id |
ftuninapoliparth |
language |
English |
description |
The highly complex circulation and variability in the Southern Ocean are well known to strongly affect the global climate, yet their functioning is still far from being fully understood. In this presentation we focus on mechanisms of variability of the Antarctic Circumpolar Current (ACC) induced by intrinsic nonlinear effects over various spatial and temporal scales. These mechanisms are identified and analyzed through the results of primitive equation ocean models. A hierarchy of models forced with steady climatological wind forcing has first been implemented for a barotropic ocean with flat bottom, with an idealized topography and with a comparable realistic bathymetry that is able to prevent a total topographic steering: in this last case the role of the bottom form drag on the dynamical balance of the ACC could be assessed. Baroclinic effects have subsequently been modeled with the Princeton Ocean Model forced with both momentum and heat fluxes in more realistic configurations. The simulations show evidence of several phenomena of intrinsic variability that are strongly sensitive to the bottom topography, viscous parameterization and background stratification. Moreover, a preliminary statistical investigation of the dynamical relationship between different regions of the ACC indicates the existence of teleconnection mechanisms in the Southern Ocean dynamics. |
author2 |
Copernicus GmbH Pierini, Stefano |
format |
Conference Object |
author |
PIERINI, Stefano |
spellingShingle |
PIERINI, Stefano Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
author_facet |
PIERINI, Stefano |
author_sort |
PIERINI, Stefano |
title |
Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
title_short |
Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
title_full |
Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
title_fullStr |
Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
title_full_unstemmed |
Mechanisms of intrinsic variability and teleconnection in the Antarctic Circumpolar Current |
title_sort |
mechanisms of intrinsic variability and teleconnection in the antarctic circumpolar current |
publisher |
country:AUT |
publishDate |
2011 |
url |
http://hdl.handle.net/11367/32389 |
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 |
ispartofbook:Geophysical Research Abstracts, 13, 8984, eISSN 1607-7962 European Geosciences Union General Assembly http://hdl.handle.net/11367/32389 |
_version_ |
1789325765878218752 |