Antarctic ozone variability inside the polar vortex estimated from balloon measurements
Thirteen years of ozone soundings at the Antarctic Belgrano II station (78° S, 34.6° W) have been analysed to establish a climatology of stratospheric ozone and temperature over the area. The station is inside the polar vortex during the period of development of chemical ozone depletion. Weekly peri...
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2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00045221 2023-05-15T13:55:42+02:00 Antarctic ozone variability inside the polar vortex estimated from balloon measurements Parrondo, M. C. Gil, M. Yela, M. Johnson, B. J. Ochoa, H. A. 2014-01 electronic https://doi.org/10.5194/acp-14-217-2014 https://noa.gwlb.de/receive/cop_mods_00045221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044841/acp-14-217-2014.pdf https://acp.copernicus.org/articles/14/217/2014/acp-14-217-2014.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-14-217-2014 https://noa.gwlb.de/receive/cop_mods_00045221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044841/acp-14-217-2014.pdf https://acp.copernicus.org/articles/14/217/2014/acp-14-217-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/acp-14-217-2014 2022-02-08T22:39:39Z Thirteen years of ozone soundings at the Antarctic Belgrano II station (78° S, 34.6° W) have been analysed to establish a climatology of stratospheric ozone and temperature over the area. The station is inside the polar vortex during the period of development of chemical ozone depletion. Weekly periodic profiles provide a suitable database for seasonal characterization of the evolution of stratospheric ozone, especially valuable during wintertime, when satellites and ground-based instruments based on solar radiation are not available. The work is focused on ozone loss rate variability (August–October) and its recovery (November–December) at different layers identified according to the severity of ozone loss. The time window selected for the calculations covers the phase of a quasi-linear ozone reduction, around day 220 (mid-August) to day 273 (end of September). Decrease of the total ozone column over Belgrano during spring is highly dependent on the meteorological conditions. Largest depletions (up to 59%) are reached in coldest years, while warm winters exhibit significantly lower ozone loss (20%). It has been found that about 11% of the total O3 loss, in the layer where maximum depletion occurs, takes place before sunlight has arrived, as a result of transport to Belgrano of air from a somewhat lower latitude, near the edge of the polar vortex, providing evidence of mixing inside the vortex. Spatial homogeneity of the vortex has been examined by comparing Belgrano results with those previously obtained for South Pole station (SPS) for the same altitude range and for 9 yr of overlapping data. Results show more than 25% higher ozone loss rate at SPS than at Belgrano. The behaviour can be explained taking into account (i) the transport to both stations of air from a somewhat lower latitude, near the edge of the polar vortex, where sunlight reappears sooner, resulting in earlier depletion of ozone, and (ii) the accumulated hours of sunlight, which become much greater at the South Pole after the spring equinox. According to the variability of the ozone hole recovery, a clear connection between the timing of the breakup of the vortex and the monthly ozone content was found. Minimum ozone concentration of 57 DU in the 12–24 km layer remained in November, when the vortex is more persistent, while in years when the final stratospheric warming took place "very early", mean integrated ozone rose by up to 160–180 DU. Article in Journal/Newspaper Antarc* Antarctic South pole South pole Niedersächsisches Online-Archiv NOA Antarctic Belgrano ENVELOPE(-64.967,-64.967,-65.150,-65.150) Belgrano II ENVELOPE(-34.617,-34.617,-77.867,-77.867) Belgrano II Station ENVELOPE(-34.627,-34.627,-77.874,-77.874) South Pole The Antarctic Atmospheric Chemistry and Physics 14 1 217 229 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
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topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Parrondo, M. C. Gil, M. Yela, M. Johnson, B. J. Ochoa, H. A. Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
Thirteen years of ozone soundings at the Antarctic Belgrano II station (78° S, 34.6° W) have been analysed to establish a climatology of stratospheric ozone and temperature over the area. The station is inside the polar vortex during the period of development of chemical ozone depletion. Weekly periodic profiles provide a suitable database for seasonal characterization of the evolution of stratospheric ozone, especially valuable during wintertime, when satellites and ground-based instruments based on solar radiation are not available. The work is focused on ozone loss rate variability (August–October) and its recovery (November–December) at different layers identified according to the severity of ozone loss. The time window selected for the calculations covers the phase of a quasi-linear ozone reduction, around day 220 (mid-August) to day 273 (end of September). Decrease of the total ozone column over Belgrano during spring is highly dependent on the meteorological conditions. Largest depletions (up to 59%) are reached in coldest years, while warm winters exhibit significantly lower ozone loss (20%). It has been found that about 11% of the total O3 loss, in the layer where maximum depletion occurs, takes place before sunlight has arrived, as a result of transport to Belgrano of air from a somewhat lower latitude, near the edge of the polar vortex, providing evidence of mixing inside the vortex. Spatial homogeneity of the vortex has been examined by comparing Belgrano results with those previously obtained for South Pole station (SPS) for the same altitude range and for 9 yr of overlapping data. Results show more than 25% higher ozone loss rate at SPS than at Belgrano. The behaviour can be explained taking into account (i) the transport to both stations of air from a somewhat lower latitude, near the edge of the polar vortex, where sunlight reappears sooner, resulting in earlier depletion of ozone, and (ii) the accumulated hours of sunlight, which become much greater at the South Pole after the spring equinox. According to the variability of the ozone hole recovery, a clear connection between the timing of the breakup of the vortex and the monthly ozone content was found. Minimum ozone concentration of 57 DU in the 12–24 km layer remained in November, when the vortex is more persistent, while in years when the final stratospheric warming took place "very early", mean integrated ozone rose by up to 160–180 DU. |
format |
Article in Journal/Newspaper |
author |
Parrondo, M. C. Gil, M. Yela, M. Johnson, B. J. Ochoa, H. A. |
author_facet |
Parrondo, M. C. Gil, M. Yela, M. Johnson, B. J. Ochoa, H. A. |
author_sort |
Parrondo, M. C. |
title |
Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
title_short |
Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
title_full |
Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
title_fullStr |
Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
title_full_unstemmed |
Antarctic ozone variability inside the polar vortex estimated from balloon measurements |
title_sort |
antarctic ozone variability inside the polar vortex estimated from balloon measurements |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/acp-14-217-2014 https://noa.gwlb.de/receive/cop_mods_00045221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044841/acp-14-217-2014.pdf https://acp.copernicus.org/articles/14/217/2014/acp-14-217-2014.pdf |
long_lat |
ENVELOPE(-64.967,-64.967,-65.150,-65.150) ENVELOPE(-34.617,-34.617,-77.867,-77.867) ENVELOPE(-34.627,-34.627,-77.874,-77.874) |
geographic |
Antarctic Belgrano Belgrano II Belgrano II Station South Pole The Antarctic |
geographic_facet |
Antarctic Belgrano Belgrano II Belgrano II Station South Pole The Antarctic |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-14-217-2014 https://noa.gwlb.de/receive/cop_mods_00045221 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00044841/acp-14-217-2014.pdf https://acp.copernicus.org/articles/14/217/2014/acp-14-217-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-14-217-2014 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
14 |
container_issue |
1 |
container_start_page |
217 |
op_container_end_page |
229 |
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1766262505748824064 |