Analysis of a period of elevated ozone concentration reported over the Vaal Triangle on 2 June 2013

Feig, Gregor; Ncipha, Xolile; Vertue, Beverley; Naidoo, Sasha; Mabaso, D.; Ngcukana, Nokulunga; Tshehla, Cheledi; Masuku, Njabulo

doi:10.17159/caj/2014/24/1.7051

Cited by 3 publications

(3 citation statements)

References 6 publications

(4 reference statements)

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“…The increase of the local anthropogenic activities such as solid fuel combustion and traffic emissions, coupled with gradual reduction of the boundary layer height, resulted in the rapid increase of pollutant levels in the late afternoons. The lowest concentrations were measured at midday in both seasons, corresponding with the time when the atmospheric mixing is dominant and the local fuel combustion sources are less prevalent (Feig et al, 2014), partly due to relatively high wind-speed measured at midday during winter and summer. Temporal variations of air pollutant mass concentrations suggest that air pollution levels were influenced by multiple sources (for example, domestic solid fuel and agricultural combustion, traffic emissions as well as the suspension of particulates from unpaved road (van der Berg et al, 2015)).…”

Section: The Impacts Of Meteorology On Ambient Particulate Matter Masmentioning

confidence: 96%

Characterizing Light-absorbing Aerosols in a Low-income Settlement in South Africa

Xulu

Piketh

Feig

et al. 2020

Aerosol Air Qual. Res.

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Light-absorbing aerosols, particularly black carbon (BC), have significant impacts on human health and the climate. They are also the least-studied fraction of atmospheric particles, particularly in residential areas of southern Africa. The optical characteristics of ground-based light-absorbing aerosols from Kwadela Township in South Africa are investigated in this study. Daily averaged ambient PM 2.5 highest levels were 51.39 µg m-3 and 32.18 µg m-3 , whereas hourly averages peaked at 61.31 µg m-3 and 34.69 µg m-3 during winter and summer, respectively. Levels of daily averaged light-absorbing aerosols were 2.9 times higher (1.89 ± 0.5 µg m-3) in winter 2014 than in summer 2015 (0.66 ± 0.2 µg m-3). In both seasons, hourly averaged levels showed bimodal diurnal cycles, which correlated with the PM 2.5 diurnal patterns that indicated distinct peaks in the morning and evening. These diurnal cycle peak periods corresponded with the times of increased solid domestic fuel usage, road traffic, and also shallower boundary layer. On average, light-absorbing aerosols contributed a larger proportion of total ambient PM 2.5 levels in winter (6.5 ± 1.0%) than in summer (3.4 ± 1.0%). The winter average Absorption Ångstrӧm exponent AAE (370/880 nm) (1.7± 0.5), indicated the dominance of brown carbon (BrC) from biofuel/biomass burning and/or low-quality coal combustion emissions. In summer, the average AAE (370/950 nm) (1.3 ± 0.7), suggested the presence of BC and BrC in the mornings and evenings possibly from fossil fuel combustion sources. At midday and at night in summer, the AAE was close to 1, suggesting more BC contributions from sources such as diesel emissions during this time. A combination of BC and BrC particulates dominated on 50% and 5% of the summer days, respectively, whereas fresh BC were only measured in summer days (23%). Residential solid-fuel and/biomass combustion are important sources of light-absorbing aerosols in this study region, with concomitant human health and environmental impacts.

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Section: The Impacts Of Meteorology On Ambient Particulate Matter Masmentioning

confidence: 96%

Characterizing Light-absorbing Aerosols in a Low-income Settlement in South Africa

Xulu

Piketh

Feig

et al. 2020

Aerosol Air Qual. Res.

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“…The VTAPA has high emissions from various industrial sources, including a coal-fired power plant, collieries, and quarries. This area is heavily populated with large high-density informal residential settlements, where coal and wood-burning are typical and have exceeded the health and NAAQS (Annegarn & Scorgie, 1997;DEA & NWU, 2018;DEAT, 2009;Feig et al, 2014;Lindeque, 2018;Mathee & von Schirnding, 2003;Mundackal et al, 2014).…”

Section: Vaal Triangle Airshed Priority Areamentioning

confidence: 99%

“…It is available for all stakeholders to view (DEA, 2018a). Six ambient monitoring stations (Figure 1) have been set up in the Vaal Triangle locations of Diepkloof, Kliprivier, Sebokeng, Sharpeville, Three Rivers and Zamdela (Sasolburg) (DEA, 2018c;Feig et al, 2014).…”

Section: Ambient Air Quality Trend Analysismentioning

confidence: 99%

The quality of the first and second Vaal Triangle Airshed Priority Area (VTAPA) Air Quality Management Plans

Moreoane

Mukwevho²,

Burger

2021

Clean Air J.

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In response to deteriorating air quality, South Africa implemented national programmes that aim to manage and regulate ambient air quality and air pollution. Air Quality Management Plans (AQMPs) are clear outlines of measures and resources needed to achieve air quality objectives in a given geographical area and require support from government, business, industry, non-governmental organisations (NGOs) and the public. The success of the AQMPs depends primarily on the support of all stakeholders and the quality of the management plan. The Vaal Triangle Airshed Priority Area (VTAPA) was declared in 2006 as an area where ambient air quality standards are exceeded or may cause adverse air quality impacts. This research study focused on the VTAPA to evaluate the quality of the first and second-generation AQMPs for the VTAPA. Quality evaluation includes an analysis of procedures, processes, methods and documents. Effectiveness refers to the results of individual activities; therefore, the extent to which the AQMP met the expected outcomes of the review package defined the quality of the AQMP report. Both the first and draft second-generation AQMPs were considered to be of good quality. The first-generation AQMP was found to be of better quality than that of the draft second-generation AQMP. Funding mechanisms need to be investigated to assist in implementing intervention strategies in the AQMP as both the first and draft second-generation AQMPs were found to lack the potential to secure funds. Though the draft second-generation AQMP was found to be of lesser quality, the source apportionment study for identification of all sources as well as a better-outlined air quality management system was found to be good improvements to the AQMP.

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Long-term temporal and spatial analysis of SO2 over Gauteng and Mpumalanga monitoring sites of South Africa

Sangeetha

Sivakumar

2019

Journal of Atmospheric and Solar-Terrestrial Physics

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Analysis of a period of elevated ozone concentration reported over the Vaal Triangle on 2 June 2013

Cited by 3 publications

References 6 publications

Characterizing Light-absorbing Aerosols in a Low-income Settlement in South Africa

Characterizing Light-absorbing Aerosols in a Low-income Settlement in South Africa

The quality of the first and second Vaal Triangle Airshed Priority Area (VTAPA) Air Quality Management Plans

Long-term temporal and spatial analysis of SO2 over Gauteng and Mpumalanga monitoring sites of South Africa

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