Early signatures of ozone trend reversal over the Antarctic
We report on a detailed time series analysis of long total column ozone (TO) records based on multi-satellite observations of daily resolution. We concentrate on three geographic latitudes over and around the Antarctic area, specifically on three circles at 58.5°S, 59.5°S, and 79.5°S. Almost continu...
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ftfzjuelichnvdb:oai:juser.fz-juelich.de:189151 2024-09-15T17:48:11+00:00 Early signatures of ozone trend reversal over the Antarctic Várai, Anita Homonnai, Viktória Jánosi, Imre M. Müller, Rolf DE 2015 https://juser.fz-juelich.de/record/189151 https://juser.fz-juelich.de/search?p=id:%22FZJ-2015-02351%22 eng eng Wiley-Blackwell info:eu-repo/semantics/altIdentifier/issn/2328-4277 info:eu-repo/semantics/altIdentifier/wos/WOS:000358139800001 info:eu-repo/semantics/altIdentifier/doi/10.1002/2014EF000270 info:eu-repo/semantics/altIdentifier/hdl/2128/8846 info:eu-repo/grantAgreement/EC//603557 https://juser.fz-juelich.de/record/189151 https://juser.fz-juelich.de/search?p=id:%22FZJ-2015-02351%22 info:eu-repo/semantics/openAccess Earth's Future 3(3), 95–109 (2015). doi:10.1002/2014EF000270 info:eu-repo/classification/ddc/550 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftfzjuelichnvdb https://doi.org/10.1002/2014EF000270 2024-08-05T23:55:46Z We report on a detailed time series analysis of long total column ozone (TO) records based on multi-satellite observations of daily resolution. We concentrate on three geographic latitudes over and around the Antarctic area, specifically on three circles at 58.5°S, 59.5°S, and 79.5°S. Almost continuous observations are available at the two former latitudes; however, data are lacking during the polar winter periods at 79.5°S, because the measurement technique requires sunlight. The methodology is motivated by level-crossing statistics, where subsets of the records above or below particular threshold levels are evaluated. Long-term trend reversal at around the turn of the century is already detectable for low TO levels in the raw time series in the “ozone-hole” region (79.5°S). In order to overcome the apparent non-stationarities of the time series, we determined daily TO differences (ΔTO) belonging to the same geographic longitudes between the different latitudinal circles. The result is a stable, stationary behavior for small (absolute) ΔTO values in the period January–February–March without any significant detectable trends. The high absolute value ΔTO subsets (September–October–November) indicate a robust trend reversal in the middle of the 1990s. The observed trend reversal in the total column ozone time series is consistent with the temporal development of the stratospheric halogen loading. However, a close correspondence of ozone and halogen turnaround years is not expected because of the statistical uncertainties in the determination of the ozone turnaround, and the many factors contributing to ozone depletion processes. Article in Journal/Newspaper Antarc* Antarctic Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Earth's Future 3 3 95 109 |
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Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) |
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language |
English |
topic |
info:eu-repo/classification/ddc/550 |
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info:eu-repo/classification/ddc/550 Várai, Anita Homonnai, Viktória Jánosi, Imre M. Müller, Rolf Early signatures of ozone trend reversal over the Antarctic |
topic_facet |
info:eu-repo/classification/ddc/550 |
description |
We report on a detailed time series analysis of long total column ozone (TO) records based on multi-satellite observations of daily resolution. We concentrate on three geographic latitudes over and around the Antarctic area, specifically on three circles at 58.5°S, 59.5°S, and 79.5°S. Almost continuous observations are available at the two former latitudes; however, data are lacking during the polar winter periods at 79.5°S, because the measurement technique requires sunlight. The methodology is motivated by level-crossing statistics, where subsets of the records above or below particular threshold levels are evaluated. Long-term trend reversal at around the turn of the century is already detectable for low TO levels in the raw time series in the “ozone-hole” region (79.5°S). In order to overcome the apparent non-stationarities of the time series, we determined daily TO differences (ΔTO) belonging to the same geographic longitudes between the different latitudinal circles. The result is a stable, stationary behavior for small (absolute) ΔTO values in the period January–February–March without any significant detectable trends. The high absolute value ΔTO subsets (September–October–November) indicate a robust trend reversal in the middle of the 1990s. The observed trend reversal in the total column ozone time series is consistent with the temporal development of the stratospheric halogen loading. However, a close correspondence of ozone and halogen turnaround years is not expected because of the statistical uncertainties in the determination of the ozone turnaround, and the many factors contributing to ozone depletion processes. |
format |
Article in Journal/Newspaper |
author |
Várai, Anita Homonnai, Viktória Jánosi, Imre M. Müller, Rolf |
author_facet |
Várai, Anita Homonnai, Viktória Jánosi, Imre M. Müller, Rolf |
author_sort |
Várai, Anita |
title |
Early signatures of ozone trend reversal over the Antarctic |
title_short |
Early signatures of ozone trend reversal over the Antarctic |
title_full |
Early signatures of ozone trend reversal over the Antarctic |
title_fullStr |
Early signatures of ozone trend reversal over the Antarctic |
title_full_unstemmed |
Early signatures of ozone trend reversal over the Antarctic |
title_sort |
early signatures of ozone trend reversal over the antarctic |
publisher |
Wiley-Blackwell |
publishDate |
2015 |
url |
https://juser.fz-juelich.de/record/189151 https://juser.fz-juelich.de/search?p=id:%22FZJ-2015-02351%22 |
op_coverage |
DE |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Earth's Future 3(3), 95–109 (2015). doi:10.1002/2014EF000270 |
op_relation |
info:eu-repo/semantics/altIdentifier/issn/2328-4277 info:eu-repo/semantics/altIdentifier/wos/WOS:000358139800001 info:eu-repo/semantics/altIdentifier/doi/10.1002/2014EF000270 info:eu-repo/semantics/altIdentifier/hdl/2128/8846 info:eu-repo/grantAgreement/EC//603557 https://juser.fz-juelich.de/record/189151 https://juser.fz-juelich.de/search?p=id:%22FZJ-2015-02351%22 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2014EF000270 |
container_title |
Earth's Future |
container_volume |
3 |
container_issue |
3 |
container_start_page |
95 |
op_container_end_page |
109 |
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1810289320579301376 |