DOI: 10.1016/j.atmosenv.2014.12.041
Scopus记录号: 2-s2.0-84919807953
论文题名: Impact of regional transport on the anthropogenic and biogenic secondary organic aerosols in the Los Angeles Basin
作者: Heo J ; , de Foy B ; , Olson M ; R ; , Pakbin P ; , Sioutas C ; , Schauer J ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 103 起始页码: 171
结束页码: 179
语种: 英语
英文关键词: Anthropogenic SOC
; Backward-trajectory analysis
; Biogenic SOC
; LA basin
; PMF
Scopus关键词: Aerosols
; Atmospheric movements
; Carbon
; Meteorology
; Particulate emissions
; Trajectories
; Anthropogenic SOC
; Biogenic hydrocarbon emissions
; Biogenic SOC
; PMF
; Positive Matrix Factorization
; Secondary organic carbons (SOC)
; Trajectory analysis
; Water-soluble organic carbon
; Organic carbon
; elemental carbon
; molecular marker
; organic carbon
; unclassified drug
; water soluble organic carbon
; aerosol composition
; air mass
; anthropogenic source
; atmospheric pollution
; biogenic emission
; marine atmosphere
; particulate organic carbon
; pollutant transport
; trajectory
; air quality standard
; Article
; biogenesis
; chemical analysis
; evaluation study
; exhaust gas
; humidity
; meteorology
; movement (physiology)
; particulate matter
; pollution transport
; sea
; seasonal variation
; secondary organic aerosol
; spring
; summer
; United States
; California
; Central Valley [California]
; Los Angeles Basin
; Pacific Ocean
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: This manuscript explores the role of regional transport on anthropogenic and biogenic secondary organic carbon (SOC) concentrations in ambient fine particulate (PM2.5) organic carbon (OC) in the Los Angeles (LA) Basin. Daily organic molecular markers, water soluble organic carbon (WSOC), OC, and elemental carbon (EC) measurements from May 2009 through April 2010 at a central site in downtown LA, and results from a positive matrix factorization (PMF) analysis of these data, were used to understand the role of regional transport on SOC concentrations. A backward-trajectory analysis, coupled with the measurements and estimated source contributions, were used to evaluate the origins of SOC aerosols. Anthropogenic and biogenic SOC were identified in central LA over the study period, together contributing 40% of the annual average PM2.5 OC mass. There were distinct seasonal variations, with high contributions of anthropogenic SOC in summer, and high contributions of biogenic SOC in spring. The back-trajectory analysis, coupled with daily source contributions of SOC and organic compounds as indicators, allowed us to identify potential source locations and dominant meteorological conditions contributing to elevated SOC at the measurement site. The results show that air mass movements from the Pacific Ocean are associated with higher contributions of anthropogenic SOC to the PM2.5 OC in downtown LA, suggesting that the combination of local meteorological conditions and local anthropogenic emissions led to an increase in the anthropogenic SOC. In contrast, air masses passing over the Central Valley and forested areas where there are biogenic hydrocarbon emissions are closely associated with higher contributions of biogenic SOC in the region. The study emphasizes that higher anthropogenic SOC contributions are due to the combination of local emissions with humidity air from the ocean, and that higher biogenic SOC contributions are impacted by transport of pollutants from regions outside the LA Basin. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82049
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, WI, United States; Department of Earth and Atmospheric Sciences, Saint Louis University, St. Louis, MO, United States; Civil and Environmental Engineering Department, University of Southern California, Los Angeles, CA, United States; Institute of Health and Environment, Seoul National University, Seoul, South Korea
Recommended Citation:
Heo J,, de Foy B,, Olson M,et al. Impact of regional transport on the anthropogenic and biogenic secondary organic aerosols in the Los Angeles Basin[J]. Atmospheric Environment,2015-01-01,103