Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions
The North Atlantic Oscillation (NAO) controls a large amount of the European climate variability with asymmetric impacts in both time and space. Here we investigate how the NAO impact on the local atmospheric processes (disregarding the NAO impact on the large inter-continental transport mechanisms)...
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ftcopernicus:oai:publications.copernicus.org:acp20369 2023-05-15T17:30:51+02:00 Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions Jerez, S. Jimenez-Guerrero, P. Montávez, J. P. Trigo, R. M. 2018-01-15 application/pdf https://doi.org/10.5194/acp-13-11195-2013 https://www.atmos-chem-phys.net/13/11195/2013/ eng eng doi:10.5194/acp-13-11195-2013 https://www.atmos-chem-phys.net/13/11195/2013/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-13-11195-2013 2019-12-24T09:54:52Z The North Atlantic Oscillation (NAO) controls a large amount of the European climate variability with asymmetric impacts in both time and space. Here we investigate how the NAO impact on the local atmospheric processes (disregarding the NAO impact on the large inter-continental transport mechanisms) influences the levels of various aerosol species using simulated data under constant emissions, which are fixed to the 2005 levels in order to avoid anthropogenic-induced signals. In particular, we analyze interannual variations at the seasonal timescale and focus on the ground-level. The results show that positive NAO phases favor increased aerosol concentrations in southern (northern) regions during winter (summer), while negative NAO phases enhance them in northern (southern) regions during winter (summer). The underlying processes are clearly related to the NAO impact on precipitation and wind, as they act to clean the atmosphere through removal and dispersion processes, and to the NAO impact on the radiation balance (i.e., cloudiness) as it affects the biogenic emitting activity and on the oxidative capacity of the atmosphere. Differences for all the species studied (natural inert, secondary inorganic and organic aerosols) are up to 5 μg m −3 , reaching 10 and 20 μg m −3 for PM 10 and PM 2.5 respectively, which represents variations of about 20–40% in their mean levels between opposite NAO phases. Text North Atlantic North Atlantic oscillation Copernicus Publications: E-Journals Atmospheric Chemistry and Physics 13 22 11195 11207 |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
The North Atlantic Oscillation (NAO) controls a large amount of the European climate variability with asymmetric impacts in both time and space. Here we investigate how the NAO impact on the local atmospheric processes (disregarding the NAO impact on the large inter-continental transport mechanisms) influences the levels of various aerosol species using simulated data under constant emissions, which are fixed to the 2005 levels in order to avoid anthropogenic-induced signals. In particular, we analyze interannual variations at the seasonal timescale and focus on the ground-level. The results show that positive NAO phases favor increased aerosol concentrations in southern (northern) regions during winter (summer), while negative NAO phases enhance them in northern (southern) regions during winter (summer). The underlying processes are clearly related to the NAO impact on precipitation and wind, as they act to clean the atmosphere through removal and dispersion processes, and to the NAO impact on the radiation balance (i.e., cloudiness) as it affects the biogenic emitting activity and on the oxidative capacity of the atmosphere. Differences for all the species studied (natural inert, secondary inorganic and organic aerosols) are up to 5 μg m −3 , reaching 10 and 20 μg m −3 for PM 10 and PM 2.5 respectively, which represents variations of about 20–40% in their mean levels between opposite NAO phases. |
format |
Text |
author |
Jerez, S. Jimenez-Guerrero, P. Montávez, J. P. Trigo, R. M. |
spellingShingle |
Jerez, S. Jimenez-Guerrero, P. Montávez, J. P. Trigo, R. M. Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
author_facet |
Jerez, S. Jimenez-Guerrero, P. Montávez, J. P. Trigo, R. M. |
author_sort |
Jerez, S. |
title |
Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
title_short |
Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
title_full |
Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
title_fullStr |
Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
title_full_unstemmed |
Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
title_sort |
impact of the north atlantic oscillation on european aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-13-11195-2013 https://www.atmos-chem-phys.net/13/11195/2013/ |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-13-11195-2013 https://www.atmos-chem-phys.net/13/11195/2013/ |
op_doi |
https://doi.org/10.5194/acp-13-11195-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
22 |
container_start_page |
11195 |
op_container_end_page |
11207 |
_version_ |
1766127973847531520 |