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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 108, NO. D23,
8637,
doi:10.1029/2003JD003703,
2003
Source signatures of carbon monoxide and organic functional groups in Asian Pacific Regional Aerosol Characterization Experiment
(ACE-Asia) submicron aerosol types
S. F. Maria
Department of Chemical Engineering, Princeton University, Princeton, New Jersey, USA
L. M. Russell
Scripps Institution of Oceanography, University of California at San Diego, La Jolla, California, USA
B. J. Turpin
Department of Environmental Science, Rutgers University, New Brunswick, New Jersey, USA
R. J. Porcja
Department of Environmental Science, Rutgers University, New Brunswick, New Jersey, USA
T. L. Campos
National Center for Atmospheric Research, Boulder, Colorado, USA
R. J. Weber
School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
B. J. Huebert
Department of Oceanography, University of Hawaii, Honolulu, Hawaii, USA
Abstract
Atmospheric submicron particles were collected on Teflon filters downstream of a three-stage concentrator aboard the National
Center for Atmospheric Research C-130 aircraft near Japan during the Asian Pacific Regional Aerosol Characterization Experiment
(ACE-Asia). Particle-phase organic carbon (OC) was quantified using Fourier transform infrared (FTIR) transmission spectroscopy.
Silicate, carbonate, alkane, alkene, aromatic, alcohol, carbonyl, amine, and organosulfate functional groups were identified
and separated with a four-solvent rinsing procedure. X-ray fluorescence identified elemental composition. Total OC constructed
from FTIR measurements agreed with simultaneous thermal-optical OC measurements with a slope of 0.91 and an R2 value of 0.93. OC varied from 0.4 to 14.2 μg m−3, and organic mass varied from 0.6 to 19.6 μg m−3, representing on average 36% of the identified submicron aerosol mass. Measured carbon monoxide (CO) to OC slopes illustrate
10 groups of air from regions described by an Asian emissions inventory. The CO/OC slope is used to compare sources and their
influence on organic composition. Fifty-two percent of ACE-Asia samples have CO/OC slopes indicative of biomass combustion.
Unitless CO/OC slopes above 15 are associated with increased fractions of alcohol groups, unsaturated C-H groups, and inorganic
nitrate. Increased carbonyl carbon fractions in air originating over northern Asia are consistent with secondary OC formation.
Case studies in the boundary layer demonstrate that aerosol compositions downwind of large Asian aerosol sources show clear
regional composition signatures.
Received 21
April
2003;
accepted 27
August
2003;
published 21
November
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); 0394 Atmospheric Composition and Structure: Instruments and techniques.
Read Full Article (file size: 1127416 bytes) Cited by
Citation: Maria, S. F., L. M. Russell, B. J. Turpin, R. J. Porcja, T. L. Campos, R. J. Weber, and B. J. Huebert
(2003),
Source signatures of carbon monoxide and organic functional groups in Asian Pacific Regional Aerosol Characterization Experiment
(ACE-Asia) submicron aerosol types,
J. Geophys. Res.,
108(D23),
8637,
doi:10.1029/2003JD003703.
Copyright 2003 by the American Geophysical Union.
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