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Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000

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Title: Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000
Authors: Narukawa, M. Browse this author
Kawamura, K. Browse this author →KAKEN DB
Li, S. -M. Browse this author
Bottenheim, W. Browse this author
Keywords: oxalic acid
malonic acid
succinic acid
bromine chemistry
Issue Date: May-2002
Publisher: Elsevier
Journal Title: Atmospheric Environment
Volume: 36
Issue: 15-16
Start Page: 2491
End Page: 2499
Publisher DOI: 10.1016/S1352-2310(02)00126-7
Abstract: Saturated (C2-C11) and unsaturated (C4-C5, C8) dicarboxylic acids were measured in arctic aerosol and surface snowpack samples collected during dark winter (February) and light spring (April-May) using a gas chromatography and gas chromatography/mass spectrometry. Their molecular distributions were characterized by a predominance of oxalic acid (C2), except for few spring snowpack samples that showed the predominance of succinic acid (C4). Concentrations of short chain saturated diacids (C3-C5) and 4-ketopimelic acid in the aerosol samples increased by a factor of ~5 from winter to spring. In contrast, those of saturated C6-C11 diacids and unsaturated (maleic, methylmaleic and phthalic) acids decreased by a factor of ~4 from winter to spring aerosol samples. Snowpack samples also showed a similar trend. These results of the aerosol samples suggested that the diacids are largely produced in spring by photochemical oxidation of hydrocarbons and other precursors that are transported long distances from the mid- and low-latitudes to the Arctic, but the production of oxalic acid is in part counteracted by photo-induced degradation possibly associated with bromine chemistry.
Type: article (author version)
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

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