Impact of North America on the aerosol composition in the North Atlantic free troposphere

In the AEROATLAN project we study the composition of aerosols collected over ∼ 5 years at Izaña Observatory (located at ∼ 2400ma.s.l. in Tenerife, the Canary Islands) under the prevailing westerly airflows typical of the North Atlantic free troposphere at subtropical latitudes and midlatitudes. Mass...

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Detalles Bibliográficos
Autores: García, M. Isabel, Rodríguez, Sergio, Alastuey, Andrés
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/174635
Acceso en línea:http://hdl.handle.net/10261/174635
Access Level:acceso abierto
Palabra clave:Ozone
Air quality
Ozone levels
Aerosol composition
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Impact of North America on the aerosol composition in the North Atlantic free troposphere
title Impact of North America on the aerosol composition in the North Atlantic free troposphere
spellingShingle Impact of North America on the aerosol composition in the North Atlantic free troposphere
García, M. Isabel
Ozone
Air quality
Ozone levels
Aerosol composition
title_short Impact of North America on the aerosol composition in the North Atlantic free troposphere
title_full Impact of North America on the aerosol composition in the North Atlantic free troposphere
title_fullStr Impact of North America on the aerosol composition in the North Atlantic free troposphere
title_full_unstemmed Impact of North America on the aerosol composition in the North Atlantic free troposphere
title_sort Impact of North America on the aerosol composition in the North Atlantic free troposphere
dc.creator.none.fl_str_mv García, M. Isabel
Rodríguez, Sergio
Alastuey, Andrés
author García, M. Isabel
author_facet García, M. Isabel
Rodríguez, Sergio
Alastuey, Andrés
author_role author
author2 Rodríguez, Sergio
Alastuey, Andrés
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Alastuey, Andrés [0000-0002-5453-5495]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Ozone
Air quality
Ozone levels
Aerosol composition
topic Ozone
Air quality
Ozone levels
Aerosol composition
description In the AEROATLAN project we study the composition of aerosols collected over ∼ 5 years at Izaña Observatory (located at ∼ 2400ma.s.l. in Tenerife, the Canary Islands) under the prevailing westerly airflows typical of the North Atlantic free troposphere at subtropical latitudes and midlatitudes. Mass concentrations of sub-10μm aerosols (PM10) carried by westerly winds to Izaña, after transatlantic transport, are typically within the range 1.2 and 4.2μgmĝ'3 (20th and 80th percentiles). The main contributors to background levels of aerosols (PM10 within the 1st-50th percentiles Combining double low line 0.15-2.54μgmĝ'3) are North American dust (53%), non-sea-salt sulfate (14%) and organic matter (18%). High PM10 events (75th-95th percentiles ≈ 4.0-9.0μgmĝ'3) are prompted by dust (56%), organic matter (24%) and non-sea-salt sulfate (9%). These aerosol components experience a seasonal evolution explained by (i) their spatial distribution in North America and (ii) the seasonal shift of the North American outflow, which migrates from low latitudes in winter (∼ 32°N, January-March) to high latitudes in summer (∼ 52°N, August-September). The westerlies carry maximum loads of non-sea-salt sulfate, ammonium and organic matter in spring (March-May), of North American dust from midwinter to mid-spring (February-May) and of elemental carbon in summer (August-September). Our results suggest that a significant fraction of organic aerosols may be linked to sources other than combustion (e.g. biogenic); further studies are necessary for this topic. The present study suggests that long-term evolution of the aerosol composition in the North Atlantic free troposphere will be influenced by air quality policies and the use of soils (potential dust emitter) in North America. © The Author(s) 2017.
publishDate 2017
dc.date.none.fl_str_mv 2017
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/174635
url http://hdl.handle.net/10261/174635
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-66299-P
https://doi.org/10.5194/acp-17-7387-2017
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
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instname:Consejo Superior de Investigaciones Científicas (CSIC)
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spelling Impact of North America on the aerosol composition in the North Atlantic free troposphereGarcía, M. IsabelRodríguez, SergioAlastuey, AndrésOzoneAir qualityOzone levelsAerosol compositionIn the AEROATLAN project we study the composition of aerosols collected over ∼ 5 years at Izaña Observatory (located at ∼ 2400ma.s.l. in Tenerife, the Canary Islands) under the prevailing westerly airflows typical of the North Atlantic free troposphere at subtropical latitudes and midlatitudes. Mass concentrations of sub-10μm aerosols (PM10) carried by westerly winds to Izaña, after transatlantic transport, are typically within the range 1.2 and 4.2μgmĝ'3 (20th and 80th percentiles). The main contributors to background levels of aerosols (PM10 within the 1st-50th percentiles Combining double low line 0.15-2.54μgmĝ'3) are North American dust (53%), non-sea-salt sulfate (14%) and organic matter (18%). High PM10 events (75th-95th percentiles ≈ 4.0-9.0μgmĝ'3) are prompted by dust (56%), organic matter (24%) and non-sea-salt sulfate (9%). These aerosol components experience a seasonal evolution explained by (i) their spatial distribution in North America and (ii) the seasonal shift of the North American outflow, which migrates from low latitudes in winter (∼ 32°N, January-March) to high latitudes in summer (∼ 52°N, August-September). The westerlies carry maximum loads of non-sea-salt sulfate, ammonium and organic matter in spring (March-May), of North American dust from midwinter to mid-spring (February-May) and of elemental carbon in summer (August-September). Our results suggest that a significant fraction of organic aerosols may be linked to sources other than combustion (e.g. biogenic); further studies are necessary for this topic. The present study suggests that long-term evolution of the aerosol composition in the North Atlantic free troposphere will be influenced by air quality policies and the use of soils (potential dust emitter) in North America. © The Author(s) 2017.This study is part of the project AEROATLAN (CGL2015-66299-P), funded by the Ministry of Economy and Competitiveness of Spain and the European Regional Development Fund (ERDF). The long-term records of the GAW aerosol programme are also funded by AEMET. M. Isabel García acknowledges the grant of the Canarian Agency for Research, Innovation and Information Society (ACIISI) co-funded by the European Social Funds. The authors gratefully acknowledge the NOAA/ESRL Physical Sciences Division for the provision of the NCAR/NCEP reanalysis; NILU for providing FLEXTRA backtrajectories based on meteorological data provided from ECMWF (European Centre for Medium Range Weather Forecast); the BSC (Barcelona Supercomputing Centre) for providing DREAM8b model; the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Centre (DAAC), part of the NASA Earth Observing System Data and Information System (EOSDIS), for providing the Global Fire Emissions Database; the GES-DISC Interactive Online Visualization ANd aNalysis Infrastructure (Giovanni), part of the NASA’s Goddard Earth Science (GES) Data and Information Service Centre (DISC), for the OMI AI data set; and the Storm Prediction Centre, part of the NOAA National Weather service, for providing the Severe Weather Database Files for US tornadoes. We also thank to Juan José Bustos for the calculation of the back-trajectories, Javier López-Solano for his assistance with the Aerosol Index data processing and Yvonne Boose for providing the picture of the Saharan Air Layer conditions. The excellent work performed by the staff of Izaña Observatory (Concepción Bayo, Cándida Hernández, Fernando de Ory, Virgilio Carreño, Rubén del Campo and SIELTEC Canarias) is appreciated.Peer reviewedCopernicus PublicationsMinisterio de Economía y Competitividad (España)Alastuey, Andrés [0000-0002-5453-5495]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/174635reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2015-66299-Phttps://doi.org/10.5194/acp-17-7387-2017Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1746352026-05-22T06:33:51Z
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