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Fine and coarse modes of dicarboxylic acids in the Arctic aerosols collected during the Polar Sunrise Experiment 1997

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Title: Fine and coarse modes of dicarboxylic acids in the Arctic aerosols collected during the Polar Sunrise Experiment 1997
Authors: Narukawa, M. Browse this author
Kawamura, K. Browse this author →KAKEN DB
Anlauf, K. G. Browse this author
Barrie, L. A. Browse this author
Keywords: Atmospheric Composition and Structure: Aerosols and particles
Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry
Atmospheric Composition and Structure: Pollution—urban and regional
Information Related to Geographic Region: Arctic region
Issue Date: 18-Sep-2003
Publisher: American Geophysical Union
Journal Title: Journal of Geophysical Research. Atmosphere
Volume: 108
Issue: D18
Start Page: 4575
Publisher DOI: 10.1029/2003JD003646
Abstract: Fine (<1 μm) and coarse (>1 μm) aerosol particles were collected at Alert, Canada (82°27′N, 62°30′W), during the Arctic spring as part of the Polar Sunrise Experiment 1997 and were analyzed for low molecular weight dicarboxylic acids (C2–C11) using gas chromatography with flame ionization detector (GC-FID) and GC/mass spectrometry (GC/MS). More than 80% of total diacids were detected in the fine fraction, suggesting the production by gas-to-particle conversion in the Arctic. In both fractions, oxalic acid was the dominant diacid species followed by succinic and malonic acids. Shorter chain diacids (C2–C5) showed the concentration maximum on 5–7 April; however, longer chain diacids (<C6) did not show a clear peak in the same periods. A significant depletion of ozone was observed during the experiment, where an anticorrelation was found between the concentrations of ozone and shorter chain diacids (C2–C5) in both fine and coarse aerosols. During this event, we also observed the enhanced concentration of filterable bromine in both modes. Peaks of dicarboxylic acids in both coarse and fine aerosols during ozone depletion events indicate that heterogeneous reactions are occurring on coarse particle and possibly on fine particles as well. Dicarboxylic acids may be produced by the oxidation of precursor compounds such as glyoxal and glyoxylic and other ω-oxocarboxylic acids that contain aldehyde (hydrated form) group, being involved with ozone and halogen chemistry in the Arctic marine boundary layer.
Rights: An edited version of this paper was published by AGU. Copyright 2003 American Geophysical Union.
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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