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Time-resolved variations in the distributions of inorganic ions, carbonaceous components, dicarboxylic acids and related compounds in atmospheric aerosols from Sapporo, northern Japan during summertime
| Title: | Time-resolved variations in the distributions of inorganic ions, carbonaceous components, dicarboxylic acids and related compounds in atmospheric aerosols from Sapporo, northern Japan during summertime |
| Authors: | Pavuluri, Chandra Mouli Browse this author | | Kawamura, Kimitaka Browse this author →KAKEN DB | | Kikuta, Motomi Browse this author | | Tachibana, Eri Browse this author | | Aggarwal, Shankar G. Browse this author |
| Keywords: | Inorganic ions | | Organic carbon | | WSOC | | Dicarboxylic acids | | Ketoacids | | α-Dicarbonyls | | Time-resolved variation | | Long-range transport |
| Issue Date: | Dec-2012 |
| Publisher: | Elsevier |
| Journal Title: | Atmospheric Environment |
| Volume: | 62 |
| Start Page: | 622 |
| End Page: | 630 |
| Publisher DOI: | 10.1016/j.atmosenv.2012.08.063 |
| Abstract: | To better understand time-resolved variations of water-soluble organic aerosols in the atmosphere, we collected atmospheric particles (TSP) every 3 h during summertime (8-10 August, 2005) in Sapporo, northern Japan. We measured inorganic ions, carbonaceous components, dicarboxylic acids, ketoacids and α-dicarbonyls in TSP. SO4^[2-] was found as the most abundant ionic species (57 ± 9% of total ions determined) followed by NH4+ and NO3-. However, none of the ionic species showed any diurnal trend throughout the campaign. Organic carbon (OC) ranged from 2.1 to 12.1 μg m^[-3] whereas elemental carbon (EC) was negligible in most of the samples (0.31 ± 0.56 μg m^[-3]). Oxalic (C2) acid was the most abundant diacid species, followed by malonic (C3) and succinic (C4) acids. Water-soluble OC (WSOC), water-insoluble OC (WIOC) and OC as well as dominant diacids (C2-C4), total diacids, ketoacids and α-dicarbonyls did not show diurnal trend on 8 August, but they showed clear diurnal distributions during 9-10 August following the changes in ambient temperature (and radiation). Detailed analyses of time-resolved aerosols demonstrate that diurnal variations of organic aerosol compositions are caused by local in situ photochemical production, but are significantly superimposed by long-range atmospheric transport of aerosols, particularly when the air masses are enriched with emissions from higher plants and/or biomass burning, and their photochemical processing during the transport. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/51069 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 河村 公隆
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