Size distributions, sources and source areas of water-soluble organic carbon in urban background air

This paper represents the results of one year long measurement period of the size distributions of water-soluble organic carbon (WSOC), inorganic ions and gravimetric mass of particulate matter. Measurements were done at an urban background station (SMEAR III) by using a micro-orifice uniform deposi...

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Published in:Atmospheric Chemistry and Physics
Main Authors: Timonen, H., Saarikoski, S., Tolonen-Kivimäki, O., Aurela, M., Saarnio, K., Petäjä, T., Aalto, P. P., Kulmala, M., Pakkanen, T., Hillamo, R.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2008
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Online Access:https://doi.org/10.5194/acp-8-5635-2008
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00048058 2023-05-15T15:16:01+02:00 Size distributions, sources and source areas of water-soluble organic carbon in urban background air Timonen, H. Saarikoski, S. Tolonen-Kivimäki, O. Aurela, M. Saarnio, K. Petäjä, T. Aalto, P. P. Kulmala, M. Pakkanen, T. Hillamo, R. 2008-09 electronic https://doi.org/10.5194/acp-8-5635-2008 https://noa.gwlb.de/receive/cop_mods_00048058 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047678/acp-8-5635-2008.pdf https://acp.copernicus.org/articles/8/5635/2008/acp-8-5635-2008.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-8-5635-2008 https://noa.gwlb.de/receive/cop_mods_00048058 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047678/acp-8-5635-2008.pdf https://acp.copernicus.org/articles/8/5635/2008/acp-8-5635-2008.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2008 ftnonlinearchiv https://doi.org/10.5194/acp-8-5635-2008 2022-02-08T22:38:09Z This paper represents the results of one year long measurement period of the size distributions of water-soluble organic carbon (WSOC), inorganic ions and gravimetric mass of particulate matter. Measurements were done at an urban background station (SMEAR III) by using a micro-orifice uniform deposit impactor (MOUDI). The site is located in northern European boreal region in Helsinki, Finland. The WSOC size distribution measurements were completed with the chemical analysis of inorganic ions, organic carbon (OC) and monosaccharide anhydrides from the filter samples (particle aerodynamic diameter smaller than 1 μm, PM1). Gravimetric mass concentration varied during the MOUDI samplings between 3.4 and 55.0 μg m−3 and the WSOC concentrations were between 0.3 and 7.4 μg m−3. On average, water-soluble particulate organic matter (WSPOM, WSOC multiplied by 1.6 to convert the analyzed carbon mass to organic matter mass) comprised 25±7.7% and 7.5±3.4% of aerosol PM1 mass and the PM1–10 mass, respectively. Inorganic ions contributed 33±12% and 28±19% of the analyzed PM1 and PM1–10 aerosol mass. Five different aerosol categories corresponding to different sources or source areas were identified (long-range transport aerosols, biomass burning aerosols from wild land fires and from small-scale wood combustion, aerosols originating from marine areas and from the clean arctic areas). Categories were identified mainly using levoglucosan concentration level for wood combustion and air mass backward trajectories for other groups. Clear differences in WSOC concentrations and size distributions originating from different sources or source areas were observed, although there are also many other factors which might affect the results. E.g. the local conditions and sources of volatile organic compounds (VOCs) and aerosols as well as various transformation processes are likely to have an impact on the measured aerosol composition. Using the source categories, it was identified that especially the oxidation products of biogenic VOCs in summer had a clear effect on WSOC concentrations. Article in Journal/Newspaper Arctic Niedersächsisches Online-Archiv NOA Arctic Atmospheric Chemistry and Physics 8 18 5635 5647
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Timonen, H.
Saarikoski, S.
Tolonen-Kivimäki, O.
Aurela, M.
Saarnio, K.
Petäjä, T.
Aalto, P. P.
Kulmala, M.
Pakkanen, T.
Hillamo, R.
Size distributions, sources and source areas of water-soluble organic carbon in urban background air
topic_facet article
Verlagsveröffentlichung
description This paper represents the results of one year long measurement period of the size distributions of water-soluble organic carbon (WSOC), inorganic ions and gravimetric mass of particulate matter. Measurements were done at an urban background station (SMEAR III) by using a micro-orifice uniform deposit impactor (MOUDI). The site is located in northern European boreal region in Helsinki, Finland. The WSOC size distribution measurements were completed with the chemical analysis of inorganic ions, organic carbon (OC) and monosaccharide anhydrides from the filter samples (particle aerodynamic diameter smaller than 1 μm, PM1). Gravimetric mass concentration varied during the MOUDI samplings between 3.4 and 55.0 μg m−3 and the WSOC concentrations were between 0.3 and 7.4 μg m−3. On average, water-soluble particulate organic matter (WSPOM, WSOC multiplied by 1.6 to convert the analyzed carbon mass to organic matter mass) comprised 25±7.7% and 7.5±3.4% of aerosol PM1 mass and the PM1–10 mass, respectively. Inorganic ions contributed 33±12% and 28±19% of the analyzed PM1 and PM1–10 aerosol mass. Five different aerosol categories corresponding to different sources or source areas were identified (long-range transport aerosols, biomass burning aerosols from wild land fires and from small-scale wood combustion, aerosols originating from marine areas and from the clean arctic areas). Categories were identified mainly using levoglucosan concentration level for wood combustion and air mass backward trajectories for other groups. Clear differences in WSOC concentrations and size distributions originating from different sources or source areas were observed, although there are also many other factors which might affect the results. E.g. the local conditions and sources of volatile organic compounds (VOCs) and aerosols as well as various transformation processes are likely to have an impact on the measured aerosol composition. Using the source categories, it was identified that especially the oxidation products of biogenic VOCs in summer had a clear effect on WSOC concentrations.
format Article in Journal/Newspaper
author Timonen, H.
Saarikoski, S.
Tolonen-Kivimäki, O.
Aurela, M.
Saarnio, K.
Petäjä, T.
Aalto, P. P.
Kulmala, M.
Pakkanen, T.
Hillamo, R.
author_facet Timonen, H.
Saarikoski, S.
Tolonen-Kivimäki, O.
Aurela, M.
Saarnio, K.
Petäjä, T.
Aalto, P. P.
Kulmala, M.
Pakkanen, T.
Hillamo, R.
author_sort Timonen, H.
title Size distributions, sources and source areas of water-soluble organic carbon in urban background air
title_short Size distributions, sources and source areas of water-soluble organic carbon in urban background air
title_full Size distributions, sources and source areas of water-soluble organic carbon in urban background air
title_fullStr Size distributions, sources and source areas of water-soluble organic carbon in urban background air
title_full_unstemmed Size distributions, sources and source areas of water-soluble organic carbon in urban background air
title_sort size distributions, sources and source areas of water-soluble organic carbon in urban background air
publisher Copernicus Publications
publishDate 2008
url https://doi.org/10.5194/acp-8-5635-2008
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https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047678/acp-8-5635-2008.pdf
https://acp.copernicus.org/articles/8/5635/2008/acp-8-5635-2008.pdf
geographic Arctic
geographic_facet Arctic
genre Arctic
genre_facet Arctic
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-8-5635-2008
https://noa.gwlb.de/receive/cop_mods_00048058
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00047678/acp-8-5635-2008.pdf
https://acp.copernicus.org/articles/8/5635/2008/acp-8-5635-2008.pdf
op_rights uneingeschränkt
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op_doi https://doi.org/10.5194/acp-8-5635-2008
container_title Atmospheric Chemistry and Physics
container_volume 8
container_issue 18
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