Observations of OM/OC and specific attenuation coefficients (SAC) in ambient fine PM at a rural site in central Ontario, Canada

被引:62
作者
Chan, T. W. [1 ]
Huang, L. [1 ]
Leaitch, W. R. [1 ]
Sharma, S. [1 ]
Brook, J. R. [1 ]
Slowik, J. G. [2 ]
Abbatt, J. P. D. [2 ]
Brickell, P. C. [1 ]
Liggio, J. [1 ]
Li, S. -M. [1 ]
Moosmueller, H. [3 ]
机构
[1] Environm Canada, ASTD STB, Toronto, ON M3H 5T4, Canada
[2] Univ Toronto, Dept Chem, Lash Miller Chem Labs, Toronto, ON M5S 3H6, Canada
[3] Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
基金
加拿大自然科学与工程研究理事会;
关键词
AEROSOL MASS-SPECTROMETER; SECONDARY ORGANIC AEROSOL; LIGHT-ABSORPTION MEASUREMENTS; LOS-ANGELES; ELEMENTAL CARBON; BLACK CARBON; ATMOSPHERIC AEROSOLS; LABORATORY MEASUREMENTS; THERMAL MEASUREMENTS; PARTICLE FORMATION;
D O I
10.5194/acp-10-2393-2010
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Ambient particulate matter (PM) samples were collected on quartz filters at a rural site in central Ontario during an intensive study in 2007. The concentrations of organic carbon (OC), pyrolysis organic carbon (POC), and elemental carbon (EC) were determined by thermal analysis. The concentrations are compared to the organic aerosol mass concentration (OM) measured with an Aerodyne C-ToF Aerosol Mass Spectrometer (AMS) and to the particle absorption coefficient (b(asp)) obtained from a Radiance Research Particle Soot Absorption Photometer (PSAP). The total organic mass to organic carbon ratios (OM/OC) and specific attenuation coefficients (SAC=b(asp)/EC) are derived. Proportionality of the POC mass with the oxygen mass in the aerosols estimated from the AMS offers a potential means to estimate OM/OC from thermal measurements only. The mean SAC for the study is 3.8 +/- 0.3 m(2) g(-1). It is found that the SAC is independent of or decrease with increasing particle mass loading, depending on whether or not the data are separated between aerosols dominated by more recent anthropogenic input and aerosols dominated by longer residence time or biogenic components. There is no evidence to support an enhancement of light absorption by the condensation of secondary material to particles, suggesting that present model simulations built on such an assumption may overestimate atmospheric warming by BC.
引用
收藏
页码:2393 / 2411
页数:19
相关论文
共 95 条
[1]   O/C and OM/OC ratios of primary, secondary, and ambient organic aerosols with high-resolution time-of-flight aerosol mass spectrometry [J].
Aiken, Allison C. ;
Decarlo, Peter F. ;
Kroll, Jesse H. ;
Worsnop, Douglas R. ;
Huffman, J. Alex ;
Docherty, Kenneth S. ;
Ulbrich, Ingrid M. ;
Mohr, Claudia ;
Kimmel, Joel R. ;
Sueper, Donna ;
Sun, Yele ;
Zhang, Qi ;
Trimborn, Achim ;
Northway, Megan ;
Ziemann, Paul J. ;
Canagaratna, Manjula R. ;
Onasch, Timothy B. ;
Alfarra, M. Rami ;
Prevot, Andre S. H. ;
Dommen, Josef ;
Duplissy, Jonathan ;
Metzger, Axel ;
Baltensperger, Urs ;
Jimenez, Jose L. .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2008, 42 (12) :4478-4485
[2]   Elemental analysis of organic species with electron ionization high-resolution mass spectrometry [J].
Aiken, Allison. C. ;
DeCarlo, Peter F. ;
Jimenez, Jose L. .
ANALYTICAL CHEMISTRY, 2007, 79 (21) :8350-8358
[3]   A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber [J].
Alfarra, M. R. ;
Paulsen, D. ;
Gysel, M. ;
Garforth, A. A. ;
Dommen, J. ;
Prevot, A. S. H. ;
Worsnop, D. R. ;
Baltensperger, U. ;
Coe, H. .
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2006, 6 :5279-5293
[4]   Quantitative sampling using an Aerodyne aerosol mass spectrometer - 1. Techniques of data interpretation and error analysis [J].
Allan, JD ;
Jimenez, JL ;
Williams, PI ;
Alfarra, MR ;
Bower, KN ;
Jayne, JT ;
Coe, H ;
Worsnop, DR .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003, 108 (D3)
[5]   Atmospheric carbonaceous aerosols over grasslands of central Europe and a Boreal forest [J].
Alves, C ;
Pio, C ;
Carvalho, A ;
Santos, C .
CHEMOSPHERE, 2006, 63 (01) :153-164
[6]  
[Anonymous], 2020, Gothenburg Protocol to reduce transboundary air pollution, DOI DOI 10.5860/CHOICE.44-4512
[7]   Photoacoustic and filter-based ambient aerosol light absorption measurements:: Instrument comparisons and the role of relative humidity -: art. no. 4034 [J].
Arnott, WP ;
Moosmüller, H ;
Sheridan, PJ ;
Ogren, JA ;
Raspet, R ;
Slaton, WV ;
Hand, JL ;
Kreidenweis, SM ;
Collett, JL .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2003, 108 (D1)
[8]   GAS-PHASE TROPOSPHERIC CHEMISTRY OF ORGANIC-COMPOUNDS - A REVIEW [J].
ATKINSON, R .
ATMOSPHERIC ENVIRONMENT PART A-GENERAL TOPICS, 1990, 24 (01) :1-41
[9]   Seasonal estimation of organic mass to organic carbon in PM2.5 at rural and urban locations in New York state [J].
Bae, Min-Suk ;
Demerjian, Kenneth L. ;
Schwab, James J. .
ATMOSPHERIC ENVIRONMENT, 2006, 40 (39) :7467-7479
[10]   Climatology of PM2.5 organic carbon concentrations from a review of ground-based atmospheric measurements by evolved gas analysis [J].
Bahadur, Ranjit ;
Habib, Gazala ;
Russell, Lynn M. .
ATMOSPHERIC ENVIRONMENT, 2009, 43 (09) :1591-1602