|
|
Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
Peer-reviewed Journal Articles, etc >
Dicarboxylic acids, ketocarboxylic acids and glyoxal in the marine aerosols collected during a round-the-world cruise
| Title: | Dicarboxylic acids, ketocarboxylic acids and glyoxal in the marine aerosols collected during a round-the-world cruise |
| Authors: | Fu, Pingqing Browse this author | | Kawamura, Kimitaka Browse this author →KAKEN DB | | Usukura, Kouichi Browse this author | | Miura, Kazuhiko Browse this author |
| Keywords: | Marine organic aerosols | | Dicarboxylic acids | | Oxalic acid | | Glyoxylic acid | | Glyoxal | | Secondary organic aerosols |
| Issue Date: | 20-Jan-2013 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Marine Chemistry |
| Volume: | 148 |
| Start Page: | 22 |
| End Page: | 32 |
| Publisher DOI: | 10.1016/j.marchem.2012.11.002 |
| Abstract: | This study investigated spatial distributions of water-soluble dicarboxylic acids and related compounds in the marine aerosols collected at low- to mid-latitudes in the Northern Hemisphere for a better understanding of the photochemical aging of organic aerosols during long-range transport. Their molecular distributions were characterized by the predominance of oxalic acid (C2) followed by malonic (C3) and succinic (C4) acids, except for one sample (QFF114, C2>C4>C3) that was collected in the western North Pacific with a heavy influence of biomass burning. Concentration ranges of diacids, ketoacids (including glyoxylic acid and pyruvic acid), and glyoxal were 17-718 ng m^[-3] (average 218 ng m^[-3]), 0.40-72 ng m^[-3] (23 ng m^[-3]), and 0.16-19 ng m^[-3] (33 ng m^[-3]), which account for 3.6-23% (14%), 0.09-23% (1.3%), and 0.04-0.45% (0.19%) of organic carbon (OC) in the marine aerosols, respectively. Positive correlations were observed between OC and diacids/ketoacids. Positive correlations were also found between biogenic secondary organic aerosol (SOA) tracers (e.g., 2-methylglyceric acid) and diacids/ketoacids, suggesting a significant contribution of biogenic secondary source. The spatial distributions of diacids exhibited higher loadings over the coastal/tropical regions than the open oceans, which are similar to those of the concentration ratios of malonic/succinic (C3/C4) and adipic/azelaic (C6/C9), indicating a more significant influence of anthropogenic sources over the coastal regions than the remote oceans. However, the concentration ratios of oxalic acid to levoglucosan, a biomass-burning tracer, and to C29 n-alkane, a tracer for terrestrial biogenic emission showed higher values over the open oceans than the coastal regions, suggesting a continuous production of oxalic acid during long-range atmospheric transport. This study indicates that the long-range transport of primary and secondary aerosols of continental origin and photooxidation/aerosol aging are important factors controlling the organic chemical composition of aerosol particles in the marine atmosphere. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/52117 |
| 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)
|
Submitter: 河村 公隆
|
