Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic
The transport and distribution of short-lived climate forcers in the Arctic are influenced by the prevailing atmospheric circulation patterns. Understanding the coupling between pollutant distribution and dominant atmospheric circulation types is therefore important, not least to understand the proc...
Published in: | Atmospheric Chemistry and Physics |
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Language: | English |
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058810 2023-05-15T14:38:44+02:00 Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic Thomas, Manu Anna Devasthale, Abhay Nygård, Tiina 2021-11 electronic https://doi.org/10.5194/acp-21-16593-2021 https://noa.gwlb.de/receive/cop_mods_00058810 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058433/acp-21-16593-2021.pdf https://acp.copernicus.org/articles/21/16593/2021/acp-21-16593-2021.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-21-16593-2021 https://noa.gwlb.de/receive/cop_mods_00058810 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058433/acp-21-16593-2021.pdf https://acp.copernicus.org/articles/21/16593/2021/acp-21-16593-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/acp-21-16593-2021 2022-02-08T22:32:55Z The transport and distribution of short-lived climate forcers in the Arctic are influenced by the prevailing atmospheric circulation patterns. Understanding the coupling between pollutant distribution and dominant atmospheric circulation types is therefore important, not least to understand the processes governing the local processing of pollutants in the Arctic, but also to test the fidelity of chemistry transport models to simulate the transport from the southerly latitudes. Here, we use a combination of satellite-based and reanalysis datasets spanning over 12 years (2007–2018) and investigate the concentrations of NO2, O3, CO and aerosols and their co-variability during eight different atmospheric circulation types in the spring season (March, April and May) over the Arctic. We carried out a self-organizing map analysis of mean sea level pressure to derive these circulation types. Although almost all pollutants investigated here show statistically significant sensitivity to the circulation types, NO2 exhibits the strongest sensitivity among them. The circulation types with low-pressure systems located over the northeast Atlantic show a clear enhancement of NO2 and aerosol optical depths (AODs) in the European Arctic. The O3 concentrations are, however, decreased. The free tropospheric CO is increased over the Arctic during such events. The circulation types with atmospheric blocking over Greenland and northern Scandinavia show the opposite signal in which the NO2 concentrations are decreased and AODs are smaller than the climatological values. The O3 concentrations are, however, increased, and the free tropospheric CO is decreased during such events. The study provides the most comprehensive assessment so far of the sensitivity of springtime pollutant distribution to the atmospheric circulation types in the Arctic and also provides an observational basis for the evaluation of chemistry transport models. Article in Journal/Newspaper Arctic Greenland Northeast Atlantic Niedersächsisches Online-Archiv NOA Arctic Greenland Atmospheric Chemistry and Physics 21 21 16593 16608 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Thomas, Manu Anna Devasthale, Abhay Nygård, Tiina Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
topic_facet |
article Verlagsveröffentlichung |
description |
The transport and distribution of short-lived climate forcers in the Arctic are influenced by the prevailing atmospheric circulation patterns. Understanding the coupling between pollutant distribution and dominant atmospheric circulation types is therefore important, not least to understand the processes governing the local processing of pollutants in the Arctic, but also to test the fidelity of chemistry transport models to simulate the transport from the southerly latitudes. Here, we use a combination of satellite-based and reanalysis datasets spanning over 12 years (2007–2018) and investigate the concentrations of NO2, O3, CO and aerosols and their co-variability during eight different atmospheric circulation types in the spring season (March, April and May) over the Arctic. We carried out a self-organizing map analysis of mean sea level pressure to derive these circulation types. Although almost all pollutants investigated here show statistically significant sensitivity to the circulation types, NO2 exhibits the strongest sensitivity among them. The circulation types with low-pressure systems located over the northeast Atlantic show a clear enhancement of NO2 and aerosol optical depths (AODs) in the European Arctic. The O3 concentrations are, however, decreased. The free tropospheric CO is increased over the Arctic during such events. The circulation types with atmospheric blocking over Greenland and northern Scandinavia show the opposite signal in which the NO2 concentrations are decreased and AODs are smaller than the climatological values. The O3 concentrations are, however, increased, and the free tropospheric CO is decreased during such events. The study provides the most comprehensive assessment so far of the sensitivity of springtime pollutant distribution to the atmospheric circulation types in the Arctic and also provides an observational basis for the evaluation of chemistry transport models. |
format |
Article in Journal/Newspaper |
author |
Thomas, Manu Anna Devasthale, Abhay Nygård, Tiina |
author_facet |
Thomas, Manu Anna Devasthale, Abhay Nygård, Tiina |
author_sort |
Thomas, Manu Anna |
title |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
title_short |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
title_full |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
title_fullStr |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
title_full_unstemmed |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic |
title_sort |
influence of springtime atmospheric circulation types on the distribution of air pollutants in the arctic |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/acp-21-16593-2021 https://noa.gwlb.de/receive/cop_mods_00058810 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058433/acp-21-16593-2021.pdf https://acp.copernicus.org/articles/21/16593/2021/acp-21-16593-2021.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Northeast Atlantic |
genre_facet |
Arctic Greenland Northeast Atlantic |
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-21-16593-2021 https://noa.gwlb.de/receive/cop_mods_00058810 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00058433/acp-21-16593-2021.pdf https://acp.copernicus.org/articles/21/16593/2021/acp-21-16593-2021.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-21-16593-2021 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
21 |
container_issue |
21 |
container_start_page |
16593 |
op_container_end_page |
16608 |
_version_ |
1766310771198787584 |