Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone
A GEOS V2 CCM simulation with an internally generated quasi-biennial oscillation (QBO) signal is compared to an otherwise identical simulation without a QBO. In a present-day climate, inclusion of the modeled QBO makes a significant difference to stratospheric dynamics and ozone throughout the year....
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ftnasantrs:oai:casi.ntrs.nasa.gov:20110013375 2023-05-15T15:03:28+02:00 Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone Hurwitz, M. M. Song, I. S. Newman, P. A. Unclassified, Unlimited, Publicly available 2011 application/pdf http://hdl.handle.net/2060/20110013375 unknown Document ID: 20110013375 http://hdl.handle.net/2060/20110013375 Copyright, Distribution as joint owner in the copyright CASI Geophysics GSFC.JA.4457.2011 2011 ftnasantrs 2019-07-21T06:28:37Z A GEOS V2 CCM simulation with an internally generated quasi-biennial oscillation (QBO) signal is compared to an otherwise identical simulation without a QBO. In a present-day climate, inclusion of the modeled QBO makes a significant difference to stratospheric dynamics and ozone throughout the year. The QBO enhances variability in the tropics, as expected, but also in the polar stratosphere in some seasons. The modeled QBO also affects the mean stratospheric climate. Because tropical zonal winds in the baseline simulation are generally easterly, there is a relative increase in zonal wind magnitudes in tropical lower and middle stratosphere in the QBO simulation. Extra-tropical differences between the QBO and 'no QBO' simulations thus reflect a bias toward the westerly phase of the QBO: a relative strengthening and poleward shifting the polar stratospheric jets, and a reduction in Arctic lower stratospheric ozone. Other/Unknown Material Arctic NASA Technical Reports Server (NTRS) Arctic |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
Geophysics |
spellingShingle |
Geophysics Hurwitz, M. M. Song, I. S. Newman, P. A. Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
topic_facet |
Geophysics |
description |
A GEOS V2 CCM simulation with an internally generated quasi-biennial oscillation (QBO) signal is compared to an otherwise identical simulation without a QBO. In a present-day climate, inclusion of the modeled QBO makes a significant difference to stratospheric dynamics and ozone throughout the year. The QBO enhances variability in the tropics, as expected, but also in the polar stratosphere in some seasons. The modeled QBO also affects the mean stratospheric climate. Because tropical zonal winds in the baseline simulation are generally easterly, there is a relative increase in zonal wind magnitudes in tropical lower and middle stratosphere in the QBO simulation. Extra-tropical differences between the QBO and 'no QBO' simulations thus reflect a bias toward the westerly phase of the QBO: a relative strengthening and poleward shifting the polar stratospheric jets, and a reduction in Arctic lower stratospheric ozone. |
format |
Other/Unknown Material |
author |
Hurwitz, M. M. Song, I. S. Newman, P. A. |
author_facet |
Hurwitz, M. M. Song, I. S. Newman, P. A. |
author_sort |
Hurwitz, M. M. |
title |
Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
title_short |
Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
title_full |
Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
title_fullStr |
Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
title_full_unstemmed |
Influence of an Internally-Generated QBO on Modeled Stratospheric Dynamics and Ozone |
title_sort |
influence of an internally-generated qbo on modeled stratospheric dynamics and ozone |
publishDate |
2011 |
url |
http://hdl.handle.net/2060/20110013375 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
CASI |
op_relation |
Document ID: 20110013375 http://hdl.handle.net/2060/20110013375 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766335321469878272 |