|
Read Full Article (file size: 856000 bytes) Cited by
JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 108, NO. D23,
8638,
doi:10.1029/2002JD003249,
2003
Spatial distributions of oxygenated organic compounds (dicarboxylic acids, fatty acids, and levoglucosan) in marine aerosols
over the western Pacific and off the coast of East Asia: Continental outflow of organic aerosols during the ACE-Asia campaign
Michihiro Mochida
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Kimitaka Kawamura
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Nobuhiko Umemoto
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Minoru Kobayashi
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Sou Matsunaga
Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
Ho-Jin Lim
Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey, USA
Barbara J. Turpin
Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey, USA
Timothy S. Bates
Pacific Marine Environmental Laboratory, NOAA, Seattle, Washington, USA
Bernd R. T. Simoneit
Environmental and Petroleum Geochemistry Group, College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis,
Oregon, USA
Abstract
Aerosol sampling for major oxygenated organic compounds (dicarboxylic acids, fatty acids, and levoglucosan) was conducted
from 15 March to 19 April 2001 on board the National Oceanic and Atmospheric Administration R/V Ronald H. Brown over the western North Pacific, the East China Sea, and the Sea of Japan, as part of the Asian Pacific Regional Aerosol Characterization
Experiment (ACE-Asia) campaign. During the cruise, aerosol particles were collected on quartz fiber filters using a high-volume
air sampler. Diacids were also collected using an annular denuder sampling system to assess their gas-particle partitioning.
Concentrations of total diacids, total fatty acids, and levoglucosan were found to be higher off the coasts of East Asia than
in the remote Pacific. Contributions of these organic compounds to total organic carbon and total organic matter (OM) were
calculated to be 9.8 ± 2.3% and 19.0 ± 4.8%, respectively, assuming OM to be organic carbon × 1.6. Diacid concentrations were
highly correlated with nss-SO4
2− and NO3
−, which originate from anthropogenic sources over East Asia. The temporal variations and chain-length distributions of fatty
acids suggest that atmospheric transport of terrestrial organic materials is important off the coast of the continent. C2 − C5 diacids were present predominantly in the particulate phase. The relative abundances of C2 − C5 diacids stayed almost unchanged throughout the cruise, suggesting that deposition is more important than chemical decomposition
as a sink of diacids and that they are relatively stable end products in the atmosphere.
Received 30
November
2002;
accepted 19
March
2003;
published 23
September
2003.
Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 0345 Atmospheric Composition and Structure: Pollution—urban and regional (0305); 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry; 1610 Global Change: Atmosphere (0315, 0325).
Read Full Article (file size: 856000 bytes) Cited by
Citation: Mochida, M., K. Kawamura, N. Umemoto, M. Kobayashi, S. Matsunaga, H. Lim, B. J. Turpin, T. S. Bates, and B. R. T. Simoneit
(2003),
Spatial distributions of oxygenated organic compounds (dicarboxylic acids, fatty acids, and levoglucosan) in marine aerosols
over the western Pacific and off the coast of East Asia: Continental outflow of organic aerosols during the ACE-Asia campaign,
J. Geophys. Res.,
108(D23),
8638,
doi:10.1029/2002JD003249.
Copyright 2003 by the American Geophysical Union.
|