Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring
International audience 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 la...
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ftccsdartic:oai:HAL:hal-00318269v1 2023-11-12T04:08:22+01:00 Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring Grytsai, A. V. Evtushevsky, O. M. Agapitov, O. V. Klekociuk, A. R. Milinevsky, G. P. Taras Shevchenko National University of Kyiv Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy 2007-03-08 https://hal.science/hal-00318269 https://hal.science/hal-00318269/document https://hal.science/hal-00318269/file/angeo-25-361-2007.pdf en eng HAL CCSD European Geosciences Union hal-00318269 https://hal.science/hal-00318269 https://hal.science/hal-00318269/document https://hal.science/hal-00318269/file/angeo-25-361-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318269 Annales Geophysicae, 2007, 25 (2), pp.361-374 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2023-10-21T23:06:43Z International audience 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Weddell Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Weddell Sea Weddell |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Grytsai, A. V. Evtushevsky, O. M. Agapitov, O. V. Klekociuk, A. R. Milinevsky, G. P. Structure and long-term change in the zonal asymmetry in Antarctic total ozone during spring |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 ... |
author2 |
Taras Shevchenko National University of Kyiv Australian Antarctic Division (AAD) Australian Government, Department of the Environment and Energy |
format |
Article in Journal/Newspaper |
author |
Grytsai, A. V. Evtushevsky, O. M. Agapitov, O. V. Klekociuk, A. R. Milinevsky, G. P. |
author_facet |
Grytsai, A. V. Evtushevsky, O. M. Agapitov, O. V. Klekociuk, A. R. Milinevsky, G. P. |
author_sort |
Grytsai, A. V. |
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 |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00318269 https://hal.science/hal-00318269/document https://hal.science/hal-00318269/file/angeo-25-361-2007.pdf |
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 |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318269 Annales Geophysicae, 2007, 25 (2), pp.361-374 |
op_relation |
hal-00318269 https://hal.science/hal-00318269 https://hal.science/hal-00318269/document https://hal.science/hal-00318269/file/angeo-25-361-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782328680462155776 |