Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers
Marine aerosols were collected over the western North Atlantic off the coast of Boston to Bermuda in August 2012 using a high-volume air sampler. Aerosol samples were analyzed for organic and elemental carbon (OC/EC), low molecular weight dicarboxylic acids and related compounds, lipid class compoun...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/76047 2023-05-15T17:29:44+02:00 Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers Kawamura, Kimitaka Hoque, Mir Md. Mozammal Bates, Timothy S. Quinn, Patricia K. http://hdl.handle.net/2115/76047 https://doi.org/10.1016/j.orggeochem.2017.08.007 eng eng Elsevier http://hdl.handle.net/2115/76047 Organic geochemistry, 113: 229-238 http://dx.doi.org/10.1016/j.orggeochem.2017.08.007 © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Marine aerosols Western North Atlantic Oxalic acid Photochemical aging Stable carbon isotopic composition article (author version) fthokunivhus https://doi.org/10.1016/j.orggeochem.2017.08.007 2022-11-18T01:04:30Z Marine aerosols were collected over the western North Atlantic off the coast of Boston to Bermuda in August 2012 using a high-volume air sampler. Aerosol samples were analyzed for organic and elemental carbon (OC/EC), low molecular weight dicarboxylic acids and related compounds, lipid class compounds (n-alkanes, fatty acids and fatty alcohols), sugars and various secondary organic aerosol (SOA) tracers. Homologous series (C-2-C-12) of dicarboxylic acids (31-335 ng/m(3)) were detected with a predominance of oxalic acid. Diacids were found to be the most abundant compound class followed by monoterpeneSOA tracers > isoprene-SOA tracers > sugars > oxoacids > fatty alcohols > fatty acids > alpha-dicarbonyls > aromatic acids > n-alkanes. The concentrations of these compounds were higher in the coastal site and decreased towards the open ocean. However, the abundance of diacids stayed relatively high even in the remote ocean. Interestingly, contributions of oxalic acid to total aerosol carbon increased from the coast (2.3%) to the open ocean (5.6%) near Bermuda. Stable carbon isotope ratios of aerosol total carbon and individual diacids and oxoacids were determined using an isotope ratio mass spectrometer. The stable carbon isotopic composition of oxalic acid increased from the coast (-17.5%) to the open ocean (-12.4%), confirming that photochemical aging of organic aerosols occurred during the atmospheric over the ocean. Stable carbon isotope ratios of bulk aerosol carbon also increased from the coast near Boston (-24.3%) to the open ocean near Bermuda (-18.2%), consistent with photochemical aging of organic aerosols. Article in Journal/Newspaper North Atlantic Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Organic Geochemistry 113 229 238 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Marine aerosols Western North Atlantic Oxalic acid Photochemical aging Stable carbon isotopic composition |
spellingShingle |
Marine aerosols Western North Atlantic Oxalic acid Photochemical aging Stable carbon isotopic composition Kawamura, Kimitaka Hoque, Mir Md. Mozammal Bates, Timothy S. Quinn, Patricia K. Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
topic_facet |
Marine aerosols Western North Atlantic Oxalic acid Photochemical aging Stable carbon isotopic composition |
description |
Marine aerosols were collected over the western North Atlantic off the coast of Boston to Bermuda in August 2012 using a high-volume air sampler. Aerosol samples were analyzed for organic and elemental carbon (OC/EC), low molecular weight dicarboxylic acids and related compounds, lipid class compounds (n-alkanes, fatty acids and fatty alcohols), sugars and various secondary organic aerosol (SOA) tracers. Homologous series (C-2-C-12) of dicarboxylic acids (31-335 ng/m(3)) were detected with a predominance of oxalic acid. Diacids were found to be the most abundant compound class followed by monoterpeneSOA tracers > isoprene-SOA tracers > sugars > oxoacids > fatty alcohols > fatty acids > alpha-dicarbonyls > aromatic acids > n-alkanes. The concentrations of these compounds were higher in the coastal site and decreased towards the open ocean. However, the abundance of diacids stayed relatively high even in the remote ocean. Interestingly, contributions of oxalic acid to total aerosol carbon increased from the coast (2.3%) to the open ocean (5.6%) near Bermuda. Stable carbon isotope ratios of aerosol total carbon and individual diacids and oxoacids were determined using an isotope ratio mass spectrometer. The stable carbon isotopic composition of oxalic acid increased from the coast (-17.5%) to the open ocean (-12.4%), confirming that photochemical aging of organic aerosols occurred during the atmospheric over the ocean. Stable carbon isotope ratios of bulk aerosol carbon also increased from the coast near Boston (-24.3%) to the open ocean near Bermuda (-18.2%), consistent with photochemical aging of organic aerosols. |
format |
Article in Journal/Newspaper |
author |
Kawamura, Kimitaka Hoque, Mir Md. Mozammal Bates, Timothy S. Quinn, Patricia K. |
author_facet |
Kawamura, Kimitaka Hoque, Mir Md. Mozammal Bates, Timothy S. Quinn, Patricia K. |
author_sort |
Kawamura, Kimitaka |
title |
Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
title_short |
Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
title_full |
Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
title_fullStr |
Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
title_full_unstemmed |
Molecular distributions and isotopic compositions of organic aerosols over the western North Atlantic: Dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
title_sort |
molecular distributions and isotopic compositions of organic aerosols over the western north atlantic: dicarboxylic acids, related compounds, sugars, and secondary organic aerosol tracers |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/76047 https://doi.org/10.1016/j.orggeochem.2017.08.007 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://hdl.handle.net/2115/76047 Organic geochemistry, 113: 229-238 http://dx.doi.org/10.1016/j.orggeochem.2017.08.007 |
op_rights |
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.orggeochem.2017.08.007 |
container_title |
Organic Geochemistry |
container_volume |
113 |
container_start_page |
229 |
op_container_end_page |
238 |
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1766124522754277376 |