Evaluation of the potential source contribution function using the 2002 Quebec forest fire episode

Begum, Bilkis A.; Kim, Eugene; Jeong, Cheol–Heon; Lee, Doh-Won; Hopke, Philip K.

doi:10.1016/j.atmosenv.2005.03.008

Cited by 156 publications

(86 citation statements)

References 34 publications

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“…In comparison, residential oil combustion is even a larger source of Hg compared to wood combustion and natural gas in the US northeast ranging from 0.04 kg in Delaware to 265 kg in Ohio annually (USEPA, 2012b). Forest fires in Quebec have always been persistent sources of Hg, PM 2.5 , and carbon, impacting sites in Massachusetts (Sigler et al, 2003), Baltimore (Sapkota et al, 2005), Philadelphia (Begum et al, 2005), and northern New York (Wang et al, 2010). From 2010-2011, there were 1019 forest fires across central to southern Quebec, which had burned a total area of ∼ 3300 km 2 (NFD, 0.9 % 0.9 % 1.4 % 1.8 % 0.9 % 0.9 % 0.9 % 5.0 % 0.5 % 2.8 % 1.4 % 3.7 % ≥ 118.1 0.5 % 1.4 % 0.0 % 1.8 % 2.8 % 1.4 % 0.0 % 1.8 % 2.3 % 3.2 % 0.5 % 2.3 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 100.0 % 2012; SOPFEU, 2012).…”

Section: The Role Of Non-point Sources Natural Emissions and Other mentioning

confidence: 99%

Concentration-weighted trajectory approach to identifying potential sources of speciated atmospheric mercury at an urban coastal site in Nova Scotia, Canada

Cheng¹,

et al. 2013

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Regional and local sources contributing to gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particle-bound mercury (PBM) at an urban coastal site in Dartmouth, Nova Scotia, Canada were investigated using the Concentration-Weighted Trajectory model (CWT) and Conditional Probability Function. From 2010–2011, GEM, GOM, and PBM concentrations were 1.67 ± 1.01 ng m⁻³, 2.07 ± 3.35 pg m⁻³, and 2.32 ± 3.09 pg m⁻³, respectively. Seasonal variability was observed, with statistically higher GEM and PBM concentrations in winter and spring and higher GOM in spring. In the CWT, concentrations are the weighting factors for the trajectory residence time in modeled grid cells, which results in the identification of source areas based on the CWT values in the grid cells. Potential source areas were identified in regions with known industrial Hg sources particularly in the fall season, but also in regions without these sources (e.g. Atlantic Ocean, northern Ontario and Quebec). CWTs for GOM and PBM that were associated with ≥ 5 kg industrial Hg emissions from 2010–2011 were statistically larger than those with zero Hg emissions, despite a lack of strong correlations. A large proportion of elevated CWTs (85–97%) was in regions with zero industrial Hg sources indicating the potential role of non-point sources, natural emissions, and residential-scale combustion. Analysis of wind data suggests that a commercial harbor and vehicular traffic were potential local sources. Evaluating modeled source areas against Hg emissions inventories was not an ideal method for assessing the CWT model accuracy because of insufficient data on Hg emissions at more precise locations

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Section: The Role Of Non-point Sources Natural Emissions and Other mentioning

confidence: 99%

Concentration-weighted trajectory approach to identifying potential sources of speciated atmospheric mercury at an urban coastal site in Nova Scotia, Canada

Cheng¹,

et al. 2013

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“…PSCF can compute probability density functions reflecting the residence times of an air parcel over a given geographical area prior to its arrival at the measurement site using back trajectories (Ashbaugh et al, 1985;Begum et al, 2005). To calculate the PSCF, the geographic region covered by the trajectories is divided into an array of 0.3 × 0.3 degree grid cells (with a height of up to 500 m from ground).…”

Section: Pscf Analysismentioning

confidence: 99%

Evaluation of in situ measurements of atmospheric carbon monoxide at Mount Waliguan, China

et al. 2011

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Abstract.Quasicontinuous measurements of carbon monoxide (CO) recorded over three years at Mount Waliguan (WLG), a global baseline station in remote western China, were examined using back trajectory analysis. The data include a revision to correct the working reference scale to the WMO2000 scale and corrections for drift in the reference gases. Between July 2004 and June 2007, CO exhibited large fluctuations and the 5 %, 50 % and 95 %-percentiles of relevant CO mixing ratios were 102 ppb, 126 ppb and 194 ppb. Approximately 50 % of all observed data were selected as CO background data using a mathematical procedure of robust local regression, with the remainder affected by regional-scale pollution. The monthly mean background CO mixing ratios showed a minimum in summer and a maximum in late winter, although all seasons were affected by short-term enhancements that exceeded background levels. The CO data were compared to values observed at the high alpine research station at Jungfraujoch, Switzerland. Smaller seasonal amplitudes were observed at WLG compared to the Jungfraujoch due to lower winter and spring CO levels, however, episodic enhancements of polluted air were greater at WLG. The air parcels arriving at WLG came predominately from the west, except in summer when advection Correspondence to: L. X. Zhou (zhoulx@cams.cma.gov.cn) from the east and southeast prevailed. Transport from the east or southeast typically brought polluted air to the site, having passed over populated urban areas upwind. A large number of elevated CO mixing ratios could also be associated with advection from the northwest of WLG via the central Xinjiang Uygur Autonomous Region (XUAR) and the Ge'ermu urban area where growing industrial activities as well as crops residue burning provide sources of CO. Air masses passing over northwestern Gansu were associated with relatively high CO values suggesting an anthropogenic influence, which was likely due to anthropogenic emissions from northwestern China (based on back-trajectory and potential source contribution analysis and on the INTEX-B: intercontinental Chemical Transport Experiment-Phase B). Background conditions were observed most frequently in air parcels from remote Tibet west of WLG. The probability that air parcels pass over regions of clean or polluted regions was further identified using potential source contribution function (PSCF) analysis.

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“…Atmospheric back-trajectories and transport models have been profusely used to infer potential sources at receptor locations and identifying the physical location of their origin (Stohl, 1996;Begum et al, 2005;Fleming et al, 2012). Several statistical trajectory based approaches are used in source-receptor studies to identify probable emission sources by combining the trajectories with measured concentrations.…”

Section: Introductionmentioning

confidence: 99%

Are the Pyrenees a barrier for the transport of birch (Betula) pollen from Central Europe to the Iberian Peninsula?

Izquierdo

Alarcón

Bueso

et al. 2017

Science of The Total Environment

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This work provides a first assessment of the possible barrier effect of the Pyrenees on the atmospheric transport of airborne pollen from Europe to the North of the Iberian Peninsula. Aerobiological data recorded in three Spanish stations located at the eastern, central and western base of the Pyrenees in the period 2004-2014 have been used to identify the possible long range transport episodes of Betula pollen. The atmospheric transport routes and the origin regions have been established by means of trajectory analysis and a source receptor model. Betula pollen outbreaks were associated with the meteorological scenario characterized by the presence of a high-pressure system over Southern British Islands reinforced by a low-pressure system over Morocco and Southern Iberian Peninsula. France and Central Europe have been identified as the probable source areas of Betula pollen that arrives to Northern Spain. However, the specific source areas are mainly determined by the particular prevailing atmospheric circulation of each location. Finally, the Weather Research and Forecasting model highlighted the effect of the orography on the atmospheric transport patterns, showing paths through the western and easternmost lowlands for Vitoria-Gasteiz and Bellaterra respectively, and the direct impact of air flows over Vielha through the Garona valley.

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Evaluation of the potential source contribution function using the 2002 Quebec forest fire episode

Cited by 156 publications

References 34 publications

Concentration-weighted trajectory approach to identifying potential sources of speciated atmospheric mercury at an urban coastal site in Nova Scotia, Canada

Concentration-weighted trajectory approach to identifying potential sources of speciated atmospheric mercury at an urban coastal site in Nova Scotia, Canada

Evaluation of in situ measurements of atmospheric carbon monoxide at Mount Waliguan, China

Are the Pyrenees a barrier for the transport of birch (Betula) pollen from Central Europe to the Iberian Peninsula?

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