Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study
We have used satellite observations and a simulation from the TOMCAT chemistry transport model (CTM) to investigate the influence of the well-known wintertime North Atlantic Oscillation (NAO) on European tropospheric composition. Under the positive phase of the NAO (NAO-high), strong westerlies tend...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041695 2023-05-15T16:28:16+02:00 Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study Pope, Richard J. Chipperfield, Martyn P. Arnold, Stephen R. Glatthor, Norbert Feng, Wuhu Dhomse, Sandip S. Kerridge, Brian J. Latter, Barry G. Siddans, Richard 2018-06 electronic https://doi.org/10.5194/acp-18-8389-2018 https://noa.gwlb.de/receive/cop_mods_00041695 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041315/acp-18-8389-2018.pdf https://acp.copernicus.org/articles/18/8389/2018/acp-18-8389-2018.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-18-8389-2018 https://noa.gwlb.de/receive/cop_mods_00041695 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041315/acp-18-8389-2018.pdf https://acp.copernicus.org/articles/18/8389/2018/acp-18-8389-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/acp-18-8389-2018 2022-02-08T22:41:29Z We have used satellite observations and a simulation from the TOMCAT chemistry transport model (CTM) to investigate the influence of the well-known wintertime North Atlantic Oscillation (NAO) on European tropospheric composition. Under the positive phase of the NAO (NAO-high), strong westerlies tend to enhance transport of European pollution (e.g. nitrogen oxides, NOx; carbon monoxide, CO) away from anthropogenic source regions. In contrast, during the negative phase of the NAO (NAO-low), more stable meteorological conditions lead to a build-up of pollutants over these regions relative to the wintertime average pollution levels. However, the secondary pollutant ozone shows the opposite signal of larger values during NAO-high. NAO-high introduces Atlantic ozone-enriched air into Europe, while under NAO-low westerly transport of ozone is reduced, yielding lower values over Europe. Furthermore, ozone concentrations are also decreased by chemical loss through the reaction with accumulated primary pollutants such as nitric oxide (NO) in NAO-low. Peroxyacetyl nitrate (PAN) in the upper troposphere–lower stratosphere (UTLS) peaks over Iceland and southern Greenland in NAO-low, between 200 and 100 hPa, consistent with the trapping by an anticyclone at this altitude. Model simulations show that enhanced PAN over Iceland and southern Greenland in NAO-low is associated with vertical transport of polluted air from the mid-troposphere into the UTLS. Overall, this work shows that NAO circulation patterns are an important governing factor for European wintertime composition and air pollution. Article in Journal/Newspaper Greenland Iceland North Atlantic North Atlantic oscillation Niedersächsisches Online-Archiv NOA Greenland Atmospheric Chemistry and Physics 18 11 8389 8408 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Pope, Richard J. Chipperfield, Martyn P. Arnold, Stephen R. Glatthor, Norbert Feng, Wuhu Dhomse, Sandip S. Kerridge, Brian J. Latter, Barry G. Siddans, Richard Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
topic_facet |
article Verlagsveröffentlichung |
description |
We have used satellite observations and a simulation from the TOMCAT chemistry transport model (CTM) to investigate the influence of the well-known wintertime North Atlantic Oscillation (NAO) on European tropospheric composition. Under the positive phase of the NAO (NAO-high), strong westerlies tend to enhance transport of European pollution (e.g. nitrogen oxides, NOx; carbon monoxide, CO) away from anthropogenic source regions. In contrast, during the negative phase of the NAO (NAO-low), more stable meteorological conditions lead to a build-up of pollutants over these regions relative to the wintertime average pollution levels. However, the secondary pollutant ozone shows the opposite signal of larger values during NAO-high. NAO-high introduces Atlantic ozone-enriched air into Europe, while under NAO-low westerly transport of ozone is reduced, yielding lower values over Europe. Furthermore, ozone concentrations are also decreased by chemical loss through the reaction with accumulated primary pollutants such as nitric oxide (NO) in NAO-low. Peroxyacetyl nitrate (PAN) in the upper troposphere–lower stratosphere (UTLS) peaks over Iceland and southern Greenland in NAO-low, between 200 and 100 hPa, consistent with the trapping by an anticyclone at this altitude. Model simulations show that enhanced PAN over Iceland and southern Greenland in NAO-low is associated with vertical transport of polluted air from the mid-troposphere into the UTLS. Overall, this work shows that NAO circulation patterns are an important governing factor for European wintertime composition and air pollution. |
format |
Article in Journal/Newspaper |
author |
Pope, Richard J. Chipperfield, Martyn P. Arnold, Stephen R. Glatthor, Norbert Feng, Wuhu Dhomse, Sandip S. Kerridge, Brian J. Latter, Barry G. Siddans, Richard |
author_facet |
Pope, Richard J. Chipperfield, Martyn P. Arnold, Stephen R. Glatthor, Norbert Feng, Wuhu Dhomse, Sandip S. Kerridge, Brian J. Latter, Barry G. Siddans, Richard |
author_sort |
Pope, Richard J. |
title |
Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
title_short |
Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
title_full |
Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
title_fullStr |
Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
title_full_unstemmed |
Influence of the wintertime North Atlantic Oscillation on European tropospheric composition: an observational and modelling study |
title_sort |
influence of the wintertime north atlantic oscillation on european tropospheric composition: an observational and modelling study |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-8389-2018 https://noa.gwlb.de/receive/cop_mods_00041695 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041315/acp-18-8389-2018.pdf https://acp.copernicus.org/articles/18/8389/2018/acp-18-8389-2018.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Iceland North Atlantic North Atlantic oscillation |
genre_facet |
Greenland Iceland North Atlantic North Atlantic oscillation |
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-18-8389-2018 https://noa.gwlb.de/receive/cop_mods_00041695 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00041315/acp-18-8389-2018.pdf https://acp.copernicus.org/articles/18/8389/2018/acp-18-8389-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/acp-18-8389-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
11 |
container_start_page |
8389 |
op_container_end_page |
8408 |
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1766017900751093760 |