Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring

The quasi-stationary asymmetry of total ozone over Antarctica during spring is studied by TOMS data during the period 1979–2005. Statistics on the amplitude and longitudinal position of zonal anomalies are obtained from the distribution of total ozone along seven individual latitudes at 5-degree int...

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Published in:Annales Geophysicae
Main Authors: A. V. Grytsai, O. M. Evtushevsky, O. V. Agapitov, A. R. Klekociuk, G. P. Milinevsky
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2007
Subjects:
Q
Online Access:https://doi.org/10.5194/angeo-25-361-2007
https://doaj.org/article/b284eafcb28b43f9afc779319c62b739
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spelling ftdoajarticles:oai:doaj.org/article:b284eafcb28b43f9afc779319c62b739 2023-05-15T14:05:01+02:00 Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring A. V. Grytsai O. M. Evtushevsky O. V. Agapitov A. R. Klekociuk G. P. Milinevsky 2007-03-01T00:00:00Z https://doi.org/10.5194/angeo-25-361-2007 https://doaj.org/article/b284eafcb28b43f9afc779319c62b739 EN eng Copernicus Publications https://www.ann-geophys.net/25/361/2007/angeo-25-361-2007.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-25-361-2007 0992-7689 1432-0576 https://doaj.org/article/b284eafcb28b43f9afc779319c62b739 Annales Geophysicae, Vol 25, Pp 361-374 (2007) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2007 ftdoajarticles https://doi.org/10.5194/angeo-25-361-2007 2022-12-31T14:43:00Z The quasi-stationary asymmetry of total ozone over Antarctica during spring is studied by TOMS data during the period 1979–2005. Statistics on the amplitude and longitudinal position of zonal anomalies are obtained from the distribution of total ozone along seven individual latitudes at 5-degree intervals between 50° S and 80° S. As shown by the September-November means, the mid-latitude collar of ozone-rich stratospheric air has a sub-Antarctic maximum with a mean location in the quadrant 90° E–180° E and a total ozone level of about 380 DU between 50° S and 60° S. The steady displacement and elongation of the ozone hole under the influence of planetary waves causes a zonal anomaly of low ozone in the sector 0°–60° W with total ozone levels of about 200 DU between 70° S and 80° S. Climatologically, the highest amplitude of the zonal anomaly is 57.2±13.5 DU (relative asymmetry of 32% between high and low ozone levels) at 65° S latitude. A significant eastward shift of approximately 45° in longitude is observed in the total ozone minimum over the Weddell Sea – South Atlantic sector during 1979–2005, whereas the zonal maximum is relatively stable in location. Also apparent is a long-term shift in tropopause temperature distribution in the region. The geographical distribution of the zonal extremes in total ozone for the seven latitudes shows that (i) the extremes exhibit sensitivity to the shape of the Antarctic continent, (ii) the stationarity of the extremes increases poleward above the edge of continent and (iii) the positions of the extremes at the higher latitudes tend to follow the meridionally oriented elements of orography. It is suggested that the radiative influence of Antarctica contributes to the formation of this pattern. Anomalies in the horizontal structure of the tropopause, which appear related to orography, support this view. Mechanisms involved in the formation and decadal change in the total ozone asymmetry, as well as possible influences of the asymmetry on the stratospheric thermal regimes ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Weddell Sea Weddell Annales Geophysicae 25 2 361 374
institution Open Polar
collection Directory of Open Access Journals: DOAJ Articles
op_collection_id ftdoajarticles
language English
topic Science
Q
Physics
QC1-999
Geophysics. Cosmic physics
QC801-809
spellingShingle Science
Q
Physics
QC1-999
Geophysics. Cosmic physics
QC801-809
A. V. Grytsai
O. M. Evtushevsky
O. V. Agapitov
A. R. Klekociuk
G. P. Milinevsky
Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
topic_facet Science
Q
Physics
QC1-999
Geophysics. Cosmic physics
QC801-809
description The quasi-stationary asymmetry of total ozone over Antarctica during spring is studied by TOMS data during the period 1979–2005. Statistics on the amplitude and longitudinal position of zonal anomalies are obtained from the distribution of total ozone along seven individual latitudes at 5-degree intervals between 50° S and 80° S. As shown by the September-November means, the mid-latitude collar of ozone-rich stratospheric air has a sub-Antarctic maximum with a mean location in the quadrant 90° E–180° E and a total ozone level of about 380 DU between 50° S and 60° S. The steady displacement and elongation of the ozone hole under the influence of planetary waves causes a zonal anomaly of low ozone in the sector 0°–60° W with total ozone levels of about 200 DU between 70° S and 80° S. Climatologically, the highest amplitude of the zonal anomaly is 57.2±13.5 DU (relative asymmetry of 32% between high and low ozone levels) at 65° S latitude. A significant eastward shift of approximately 45° in longitude is observed in the total ozone minimum over the Weddell Sea – South Atlantic sector during 1979–2005, whereas the zonal maximum is relatively stable in location. Also apparent is a long-term shift in tropopause temperature distribution in the region. The geographical distribution of the zonal extremes in total ozone for the seven latitudes shows that (i) the extremes exhibit sensitivity to the shape of the Antarctic continent, (ii) the stationarity of the extremes increases poleward above the edge of continent and (iii) the positions of the extremes at the higher latitudes tend to follow the meridionally oriented elements of orography. It is suggested that the radiative influence of Antarctica contributes to the formation of this pattern. Anomalies in the horizontal structure of the tropopause, which appear related to orography, support this view. Mechanisms involved in the formation and decadal change in the total ozone asymmetry, as well as possible influences of the asymmetry on the stratospheric thermal regimes ...
format Article in Journal/Newspaper
author A. V. Grytsai
O. M. Evtushevsky
O. V. Agapitov
A. R. Klekociuk
G. P. Milinevsky
author_facet A. V. Grytsai
O. M. Evtushevsky
O. V. Agapitov
A. R. Klekociuk
G. P. Milinevsky
author_sort A. V. Grytsai
title Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
title_short Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
title_full Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
title_fullStr Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
title_full_unstemmed Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
title_sort structure and long-term change in the zonal asymmetry in antarctic total ozone during spring
publisher Copernicus Publications
publishDate 2007
url https://doi.org/10.5194/angeo-25-361-2007
https://doaj.org/article/b284eafcb28b43f9afc779319c62b739
geographic Antarctic
The Antarctic
Weddell Sea
Weddell
geographic_facet Antarctic
The Antarctic
Weddell Sea
Weddell
genre Antarc*
Antarctic
Antarctica
Weddell Sea
genre_facet Antarc*
Antarctic
Antarctica
Weddell Sea
op_source Annales Geophysicae, Vol 25, Pp 361-374 (2007)
op_relation https://www.ann-geophys.net/25/361/2007/angeo-25-361-2007.pdf
https://doaj.org/toc/0992-7689
https://doaj.org/toc/1432-0576
doi:10.5194/angeo-25-361-2007
0992-7689
1432-0576
https://doaj.org/article/b284eafcb28b43f9afc779319c62b739
op_doi https://doi.org/10.5194/angeo-25-361-2007
container_title Annales Geophysicae
container_volume 25
container_issue 2
container_start_page 361
op_container_end_page 374
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