Long-range sources of Toronto particulate matter (PM2.5) identified by Aerosol Laser Ablation Mass Spectrometry (LAMS)

Owega, Sandy; Evans, Greg J.; Jervis, R. E.; Fila, Mike; D'Souza, R. J. C.; Khan, Badiuzzaman

doi:10.1016/j.atmosenv.2004.06.034

Cited by 16 publications

(8 citation statements)

References 10 publications

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“…The majority of these studies have assessed the health effects of particles expressed as the risk per unit mass/m 3 of PM 10 or PM 2.5 . Contribution from major desert dust events to PM has been reported in numerous studies conducted in Europe [8], North-America [9], Asia [10] and Australia [11]. Southern Mediterranean countries experience several transient episodes (2 -4 days) of transported Saharan dust each year, leading to levels exceeding 25 µg/m 3 and 10 -15 µg/m 3 in daily PM 10 and PM 2.5 concentrations, respectively [12].…”

Section: Introductionmentioning

confidence: 92%

Impact of Remote and Local Sources on Particulate Matter in Urban Environment

Al-Jeelani¹

2016

JEP

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In this paper, the impact of natural and anthropogenic sources on particulate matter with diameter less than 10 µm (PM 10) was investigated in Jeddah urban area, Saudi Arabia to identify and quantify the major particle pollution source classes. Hourly data of PM 10 and other gaseous pollutants (NO x , CO, SO 2 and O 3) and meteorological factors (temperature, relative humidity, atmospheric pressure, wind speed and wind direction) were collected at two air quality monitoring sites for the period of March 2008 to February 2009. The air mass origin was determined using 5-day backward trajectories arriving to Jeddah by using HYSPLIT model. Results show that the PM 10 Daily Limit Value was exceeded. The most frequent air masses entering Jeddah and thereby influencing PM 10 concentrations come from the East, specifically the SE and NE directions, 84% of the trajectories were originated over the Arabian Peninsula including Saudi Arabia mainland and the Arabian Gulf. The Mediterranean Sea and southern Europe were the origin source of 8% of the air mass trajectories, another 8% were originated from North Africa and Sahara Desert. The majority of PM 10 episodes were attributed to the intrusion of dust to Jeddah urban air.

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Section: Introductionmentioning

confidence: 92%

Impact of Remote and Local Sources on Particulate Matter in Urban Environment

Al-Jeelani¹

2016

JEP

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“…In fact, the 2002 Quebec wildfires are quickly becoming, if they are not already, the most heavily studied forest fire event to date, including the works of: Sigler et al [2003], Taubman et al [2004], Colarco et al [2004], Adam et al [2004], DeBell et al [2004], Jeong et al [2004a, 2004b], Owega et al [2004, 2006], Pahlow et al [2005], Sapkota et al [2005], Park et al [2005, 2006], Begum et al [2005], O'Neill et al [2005, 2006] and Tolocka et al [2006]. In the current work, we complement this growing body of literature by investigating the impact of the Quebec wildfires on Pittsburgh using a suite of aerosol, gas and meteorological measurements obtained during the Pittsburgh Supersite experiment, also referred to as the Pittsburgh Air Quality Study (PAQS).…”

Section: Introductionmentioning

confidence: 99%

Interactions between boreal wildfire and urban emissions

et al. 2008

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[1] A suite of particulate, gaseous and meteorological measurements during the Pittsburgh Supersite experiment were used to characterize the impact of the 2002 Quebec wildfires on pollutant concentrations and physical and chemical processes dominant in the region. Temporal trends in the number distribution of wildfire particles (isolated using Rapid Single-ultrafine-particle Mass Spectrometry data) combined with CO, NO x and O 3 mixing ratios identified two separate periods (Periods I and II) when the measurement site was directly impacted by plumes of relatively unprocessed wildfire emissions; i.e., increases in primary ultrafine wildfire particles, CO and NO x concomitant with a decrease in O 3 from intraplume NO x titration. Carbonaceous particle number distributions predominantly associated with vehicular emissions, PM 2.5 sulfate mass concentration and SO 2 mixing ratio resolved individual components of local and regional sources. Single particle signatures indicated a period of intense atmospheric processing following Period II that caused rapid growth of the ultrafine mode due to simultaneous sulfate and secondary organic mass accumulation, resulting in significant changes to particle physical and chemical properties. Particle growth was concurrent with large increases in O 3 and maxima in incoming solar radiation and ambient temperature and is posited to have occurred in situ as the air mass, containing a mixture of urban and wildfire emissions, was advected past the site. In total, the current work demonstrates significant added severity for pollution episodes in an area already burdened by large anthropogenic emission rates due to the impact of the 2002 Quebec wildfires. High levels of atmospheric processing increased sulfate accumulation and SOA formation and brought PM 2.5 mass concentrations close to, and O 3 mixing ratios in excess of, the National Ambient Air Quality Standards. Projections of increasing wildfire activity under a warming climate may increase the frequency and severity of such events.

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“…Particle sources may also be determined by combining classification of particles according to ART-2a and/or PMF and groups based on temporal trend similarities. Thus, Owega et al identified different emission sources responsible of Toronto PM 2.5 [143,144] and highlighted some long-range sources transportation from Northern Canada or Africa [143]. Same kinds of information have been obtained for particles collected in Wilmington, Delaware on a regional and local contribution point of view [145].…”

Section: On-line Ldi-ms Applicationsmentioning

confidence: 94%