Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model
Dynamical mechanisms of atmospheric regime behavior are investigated in the context of a quasigeostrophicthree-level T21 model of the wintertime atmospheric circulation over the Northern Hemisphere.The model, driven by realistic orography and using a thermal forcing determined by a newly developedtu...
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ftawi:oai:epic.awi.de:14041 2023-09-05T13:17:18+02:00 Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model Sempf, M. Dethloff, Klaus Handorf, Dörthe Kurgansky, Michael 2007 https://epic.awi.de/id/eprint/14041/ https://hdl.handle.net/10013/epic.26714 unknown Sempf, M. , Dethloff, K. , Handorf, D. orcid:0000-0002-3305-6882 and Kurgansky, M. (2007) Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model , Journal of the Atmospheric Sciences 64, pp. 887-904 . hdl:10013/epic.26714 EPIC3Journal of the Atmospheric Sciences 64, pp. 887-904 Article isiRev 2007 ftawi 2023-08-22T19:50:57Z Dynamical mechanisms of atmospheric regime behavior are investigated in the context of a quasigeostrophicthree-level T21 model of the wintertime atmospheric circulation over the Northern Hemisphere.The model, driven by realistic orography and using a thermal forcing determined by a newly developedtuning procedure, is shown to possess a reasonable climatology and to simulate the Arctic Oscillation quiterealistically. It exhibits pronounced internally generated interannual and decadal variability and, in particular,circulation regimes that agree fairly well with observed ones. Two known hypotheses about theorigin of regime behavior, as it occurs in the model herein are addressed: (i) multiple equilibria and (ii)chaotic itinerancy between attractor ruins. The first hypothesis is falsified at very high probability, while thesecond is likely to be true. Article in Journal/Newspaper Arctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Dynamical mechanisms of atmospheric regime behavior are investigated in the context of a quasigeostrophicthree-level T21 model of the wintertime atmospheric circulation over the Northern Hemisphere.The model, driven by realistic orography and using a thermal forcing determined by a newly developedtuning procedure, is shown to possess a reasonable climatology and to simulate the Arctic Oscillation quiterealistically. It exhibits pronounced internally generated interannual and decadal variability and, in particular,circulation regimes that agree fairly well with observed ones. Two known hypotheses about theorigin of regime behavior, as it occurs in the model herein are addressed: (i) multiple equilibria and (ii)chaotic itinerancy between attractor ruins. The first hypothesis is falsified at very high probability, while thesecond is likely to be true. |
format |
Article in Journal/Newspaper |
author |
Sempf, M. Dethloff, Klaus Handorf, Dörthe Kurgansky, Michael |
spellingShingle |
Sempf, M. Dethloff, Klaus Handorf, Dörthe Kurgansky, Michael Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
author_facet |
Sempf, M. Dethloff, Klaus Handorf, Dörthe Kurgansky, Michael |
author_sort |
Sempf, M. |
title |
Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
title_short |
Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
title_full |
Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
title_fullStr |
Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
title_full_unstemmed |
Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model |
title_sort |
towards understanding the dynamical origin of atmospheric regime behavior in a baroclinic model |
publishDate |
2007 |
url |
https://epic.awi.de/id/eprint/14041/ https://hdl.handle.net/10013/epic.26714 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
EPIC3Journal of the Atmospheric Sciences 64, pp. 887-904 |
op_relation |
Sempf, M. , Dethloff, K. , Handorf, D. orcid:0000-0002-3305-6882 and Kurgansky, M. (2007) Towards Understanding the Dynamical Origin of Atmospheric Regime Behavior in a Baroclinic Model , Journal of the Atmospheric Sciences 64, pp. 887-904 . hdl:10013/epic.26714 |
_version_ |
1776198522378387456 |