Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model
International audience Total column ozone is used to trace the dynamics of the lower and middle stratosphere which is governed by planetary waves. In order to analyse the planetary wave activity a Harmonic Analysis is applied to global multi-year total ozone observations from the Total Ozone Monitor...
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ftccsdartic:oai:HAL:hal-00296073v1 2023-11-12T04:05:03+01:00 Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model Erbertseder, T. Eyring, V. Bittner, M. Dameris, M. Grewe, V. German Remote Sensing Data Center (DLR-DFD) German Aerospace Center (DLR) DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) 2006-11-07 https://hal.science/hal-00296073 https://hal.science/hal-00296073/document https://hal.science/hal-00296073/file/acp-6-5105-2006.pdf en eng HAL CCSD European Geosciences Union hal-00296073 https://hal.science/hal-00296073 https://hal.science/hal-00296073/document https://hal.science/hal-00296073/file/acp-6-5105-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296073 Atmospheric Chemistry and Physics, 2006, 6 (12), pp.5105-5120 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftccsdartic 2023-10-21T23:17:13Z International audience Total column ozone is used to trace the dynamics of the lower and middle stratosphere which is governed by planetary waves. In order to analyse the planetary wave activity a Harmonic Analysis is applied to global multi-year total ozone observations from the Total Ozone Monitoring Spectrometer (TOMS). As diagnostic variables we introduce the hemispheric ozone variability indices one and two. They are defined as the hemispheric means of the amplitudes of the zonal waves number one and two, respectively, as traced by the total ozone field. The application of these indices as a simple diagnostic for the evaluation of coupled chemistry-climate models (CCMs) is demonstrated by comparing results of the CCM ECHAM4.L39(DLR)/CHEM (hereafter: E39/C) against satellite observations. It is quantified to what extent a multi-year model simulation of E39/C (representing "2000" climate conditions) is able to reproduce the zonal and hemispheric planetary wave activity derived from TOMS data (1996?2004, Version 8). Compared to the reference observations the hemispheric ozone variability indices one and two of E39/C are too high in the Northern Hemisphere and too low in the Southern Hemisphere. In the Northern Hemisphere, where the agreement is generally better, E39/C produces too strong a planetary wave one activity in winter and spring and too high an interannual variability. For the Southern Hemisphere we reveal that the indices from observations and model differ significantly during the ozone hole season. The indices are used to give reasons for the late formation of the Antarctic ozone hole, the insufficient vortex elongation and eventually the delayed final warming in E39/C. In general, the hemispheric ozone variability indices can be regarded as a simple and robust diagnostic to quantify model-observation differences concerning planetary wave activity. It allows a first-guess on how the dynamics is represented in a model simulation before applying costly and more specific diagnostics. Article in Journal/Newspaper Antarc* Antarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Erbertseder, T. Eyring, V. Bittner, M. Dameris, M. Grewe, V. Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Total column ozone is used to trace the dynamics of the lower and middle stratosphere which is governed by planetary waves. In order to analyse the planetary wave activity a Harmonic Analysis is applied to global multi-year total ozone observations from the Total Ozone Monitoring Spectrometer (TOMS). As diagnostic variables we introduce the hemispheric ozone variability indices one and two. They are defined as the hemispheric means of the amplitudes of the zonal waves number one and two, respectively, as traced by the total ozone field. The application of these indices as a simple diagnostic for the evaluation of coupled chemistry-climate models (CCMs) is demonstrated by comparing results of the CCM ECHAM4.L39(DLR)/CHEM (hereafter: E39/C) against satellite observations. It is quantified to what extent a multi-year model simulation of E39/C (representing "2000" climate conditions) is able to reproduce the zonal and hemispheric planetary wave activity derived from TOMS data (1996?2004, Version 8). Compared to the reference observations the hemispheric ozone variability indices one and two of E39/C are too high in the Northern Hemisphere and too low in the Southern Hemisphere. In the Northern Hemisphere, where the agreement is generally better, E39/C produces too strong a planetary wave one activity in winter and spring and too high an interannual variability. For the Southern Hemisphere we reveal that the indices from observations and model differ significantly during the ozone hole season. The indices are used to give reasons for the late formation of the Antarctic ozone hole, the insufficient vortex elongation and eventually the delayed final warming in E39/C. In general, the hemispheric ozone variability indices can be regarded as a simple and robust diagnostic to quantify model-observation differences concerning planetary wave activity. It allows a first-guess on how the dynamics is represented in a model simulation before applying costly and more specific diagnostics. |
author2 |
German Remote Sensing Data Center (DLR-DFD) German Aerospace Center (DLR) DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) |
format |
Article in Journal/Newspaper |
author |
Erbertseder, T. Eyring, V. Bittner, M. Dameris, M. Grewe, V. |
author_facet |
Erbertseder, T. Eyring, V. Bittner, M. Dameris, M. Grewe, V. |
author_sort |
Erbertseder, T. |
title |
Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
title_short |
Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
title_full |
Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
title_fullStr |
Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
title_full_unstemmed |
Hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
title_sort |
hemispheric ozone variability indices derived from satellite observations and comparison to a coupled chemistry-climate model |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00296073 https://hal.science/hal-00296073/document https://hal.science/hal-00296073/file/acp-6-5105-2006.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00296073 Atmospheric Chemistry and Physics, 2006, 6 (12), pp.5105-5120 |
op_relation |
hal-00296073 https://hal.science/hal-00296073 https://hal.science/hal-00296073/document https://hal.science/hal-00296073/file/acp-6-5105-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782341855884607488 |