Ozone trends at northern mid- and high latitudes – a European perspective
The EU CANDIDOZ project investigated the chemical and dynamical influences on decadal ozone trends focusing on the Northern Hemisphere. High quality long-term ozone data sets, satellite-based as well as ground-based, and the long-term meteorological reanalyses from ECMWF and NCEP are used together w...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00031440 2023-05-15T15:01:51+02:00 Ozone trends at northern mid- and high latitudes – a European perspective Harris, N. R. P. Kyrö, E. Staehelin, J. Brunner, D. Andersen, S.-B. Godin-Beekmann, S. Dhomse, S. Hadjinicolaou, P. Hansen, G. Isaksen, I. Jrrar, A. Karpetchko, A. Kivi, R. Knudsen, B. Krizan, P. Lastovicka, J. Maeder, J. Orsolini, Y. Pyle, J. A. Rex, M. Vanicek, K. Weber, M. Wohltmann, I. Zanis, P. Zerefos, C. 2008-05 electronic https://doi.org/10.5194/angeo-26-1207-2008 https://noa.gwlb.de/receive/cop_mods_00031440 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031394/angeo-26-1207-2008.pdf https://angeo.copernicus.org/articles/26/1207/2008/angeo-26-1207-2008.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-26-1207-2008 https://noa.gwlb.de/receive/cop_mods_00031440 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031394/angeo-26-1207-2008.pdf https://angeo.copernicus.org/articles/26/1207/2008/angeo-26-1207-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/angeo-26-1207-2008 2022-02-08T22:46:43Z The EU CANDIDOZ project investigated the chemical and dynamical influences on decadal ozone trends focusing on the Northern Hemisphere. High quality long-term ozone data sets, satellite-based as well as ground-based, and the long-term meteorological reanalyses from ECMWF and NCEP are used together with advanced multiple regression models and atmospheric models to assess the relative roles of chemistry and transport in stratospheric ozone changes. This overall synthesis of the individual analyses in CANDIDOZ shows clearly one common feature in the NH mid latitudes and in the Arctic: an almost monotonic negative trend from the late 1970s to the mid 1990s followed by an increase. In most trend studies, the Equivalent Effective Stratospheric Chlorine (EESC) which peaked in 1997 as a consequence of the Montreal Protocol was observed to describe ozone loss better than a simple linear trend. Furthermore, all individual analyses point to changes in dynamical drivers, such as the residual circulation (responsible for the meridional transport of ozone into middle and high latitudes) playing a key role in the observed turnaround. The changes in ozone transport are associated with variations in polar chemical ozone loss via heterogeneous ozone chemistry on PSCs (polar stratospheric clouds). Synoptic scale processes as represented by the new equivalent latitude proxy, by conventional tropopause altitude or by 250 hPa geopotential height have also been successfully linked to the recent ozone increases in the lowermost stratosphere. These show significant regional variation with a large impact over Europe and seem to be linked to changes in tropospheric climate patterns such as the North Atlantic Oscillation. Some influence in recent ozone increases was also attributed to the rise in solar cycle number 23. Changes from the late 1970s to the mid 1990s were found in a number of characteristics of the Arctic vortex. However, only one trend was found when more recent years are also considered, namely the tendency for cold winters to become colder. Article in Journal/Newspaper Arctic North Atlantic North Atlantic oscillation Niedersächsisches Online-Archiv NOA Arctic Annales Geophysicae 26 5 1207 1220 |
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Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Harris, N. R. P. Kyrö, E. Staehelin, J. Brunner, D. Andersen, S.-B. Godin-Beekmann, S. Dhomse, S. Hadjinicolaou, P. Hansen, G. Isaksen, I. Jrrar, A. Karpetchko, A. Kivi, R. Knudsen, B. Krizan, P. Lastovicka, J. Maeder, J. Orsolini, Y. Pyle, J. A. Rex, M. Vanicek, K. Weber, M. Wohltmann, I. Zanis, P. Zerefos, C. Ozone trends at northern mid- and high latitudes – a European perspective |
topic_facet |
article Verlagsveröffentlichung |
description |
The EU CANDIDOZ project investigated the chemical and dynamical influences on decadal ozone trends focusing on the Northern Hemisphere. High quality long-term ozone data sets, satellite-based as well as ground-based, and the long-term meteorological reanalyses from ECMWF and NCEP are used together with advanced multiple regression models and atmospheric models to assess the relative roles of chemistry and transport in stratospheric ozone changes. This overall synthesis of the individual analyses in CANDIDOZ shows clearly one common feature in the NH mid latitudes and in the Arctic: an almost monotonic negative trend from the late 1970s to the mid 1990s followed by an increase. In most trend studies, the Equivalent Effective Stratospheric Chlorine (EESC) which peaked in 1997 as a consequence of the Montreal Protocol was observed to describe ozone loss better than a simple linear trend. Furthermore, all individual analyses point to changes in dynamical drivers, such as the residual circulation (responsible for the meridional transport of ozone into middle and high latitudes) playing a key role in the observed turnaround. The changes in ozone transport are associated with variations in polar chemical ozone loss via heterogeneous ozone chemistry on PSCs (polar stratospheric clouds). Synoptic scale processes as represented by the new equivalent latitude proxy, by conventional tropopause altitude or by 250 hPa geopotential height have also been successfully linked to the recent ozone increases in the lowermost stratosphere. These show significant regional variation with a large impact over Europe and seem to be linked to changes in tropospheric climate patterns such as the North Atlantic Oscillation. Some influence in recent ozone increases was also attributed to the rise in solar cycle number 23. Changes from the late 1970s to the mid 1990s were found in a number of characteristics of the Arctic vortex. However, only one trend was found when more recent years are also considered, namely the tendency for cold winters to become colder. |
format |
Article in Journal/Newspaper |
author |
Harris, N. R. P. Kyrö, E. Staehelin, J. Brunner, D. Andersen, S.-B. Godin-Beekmann, S. Dhomse, S. Hadjinicolaou, P. Hansen, G. Isaksen, I. Jrrar, A. Karpetchko, A. Kivi, R. Knudsen, B. Krizan, P. Lastovicka, J. Maeder, J. Orsolini, Y. Pyle, J. A. Rex, M. Vanicek, K. Weber, M. Wohltmann, I. Zanis, P. Zerefos, C. |
author_facet |
Harris, N. R. P. Kyrö, E. Staehelin, J. Brunner, D. Andersen, S.-B. Godin-Beekmann, S. Dhomse, S. Hadjinicolaou, P. Hansen, G. Isaksen, I. Jrrar, A. Karpetchko, A. Kivi, R. Knudsen, B. Krizan, P. Lastovicka, J. Maeder, J. Orsolini, Y. Pyle, J. A. Rex, M. Vanicek, K. Weber, M. Wohltmann, I. Zanis, P. Zerefos, C. |
author_sort |
Harris, N. R. P. |
title |
Ozone trends at northern mid- and high latitudes – a European perspective |
title_short |
Ozone trends at northern mid- and high latitudes – a European perspective |
title_full |
Ozone trends at northern mid- and high latitudes – a European perspective |
title_fullStr |
Ozone trends at northern mid- and high latitudes – a European perspective |
title_full_unstemmed |
Ozone trends at northern mid- and high latitudes – a European perspective |
title_sort |
ozone trends at northern mid- and high latitudes – a european perspective |
publisher |
Copernicus Publications |
publishDate |
2008 |
url |
https://doi.org/10.5194/angeo-26-1207-2008 https://noa.gwlb.de/receive/cop_mods_00031440 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031394/angeo-26-1207-2008.pdf https://angeo.copernicus.org/articles/26/1207/2008/angeo-26-1207-2008.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic North Atlantic oscillation |
genre_facet |
Arctic North Atlantic North Atlantic oscillation |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-26-1207-2008 https://noa.gwlb.de/receive/cop_mods_00031440 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031394/angeo-26-1207-2008.pdf https://angeo.copernicus.org/articles/26/1207/2008/angeo-26-1207-2008.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-26-1207-2008 |
container_title |
Annales Geophysicae |
container_volume |
26 |
container_issue |
5 |
container_start_page |
1207 |
op_container_end_page |
1220 |
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