Browsing Faculty of Natural and Agricultural Sciences by Author "28888e28-d197-480b-81d3-42d9722c1c43"
Now showing items 1-8 of 8
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Aerosol remote sensing in polar regions
Tomasi, Claudio; Piketh, Stuart J.; Kokhanovsky, Alexander A.; Lupi, Angelo; Ritter, Christoph (Elsevier, 2015)Multi-year sets of ground-based sun-photometer measurements conducted at 12 Arctic sites and 9 Antarctic sites were examined to determine daily mean values of aerosol optical thickness τ(λ) at visible and near-infrared ... -
Assessing the impact of Eskom power plant emissions on ambient air quality over KwaZamokuhle
Chidhindi, Prince; Belelie, Monray D.; Burger, Roelof P.; Piketh, Stuart J.; Mkhatshwa, Gabi (National Association for Clean Air, 2019)Coal-fired power plants are considered a major source of criteria air pollutants. The existence of such activities close to densely populated areas has an impact on human health and more generally on the environment. The ... -
Bird species richness and densities in relation to sulphur dioxide gradients and environmental variables
Muyemeki, Luckson; Burger, Roelof; Piketh, Stuart J.; Evans, Steven W. (Taylor & Francis, 2017)The expansion of coal-fired power stations in South Africa has resulted in growing environmental concerns as they are the largest emitters of sulphur dioxide (SO2). Sulphur dioxide emissions from power plants pose a potential ... -
Fine PM emission factors from residential burning of solid fuels using traditional cast-iron coal stoves
Nkosi, Ncobile C.; Piketh, Stuart J.; Burger, Roelof, P. (NACA, 2018)Residential burning of solid fuels is a major source of fine particulate matter (PM2.5), which degrades indoor and ambient air quality in low-income settlements. The adverse impact of fine particulate emissions on the ... -
Intercomparison and assessment of long-term (2004 – 2013) multiple satellite aerosol products over two contrasting sites in South Africa
Adesina, A. Joseph; Piketh, Stuart J.; Kumar, K. Raghavendra; Sivakumar, V. (Elsevier, 2016)o build a long-term database and improve the accuracy of the satellite products used for aerosol studies, there is a need to carry out intercomparison and validation of these satellite observations with ground-based ... -
Moving households to cleaner energy through air quality offsets
Langerman, Kristy E.; Piketh, Stuart J.; Pauw, Christiaan J.; Smith, Hendrik J. (IEEE, 2018)Highest levels of exposure to polluted air in South Africa occur in low-income settlements where households burn solid fuels. The Department of Environmental Affairs has recently developed a legally enforceable mechanism ... -
Surface ozone variability and trends over the South African Highveld from 1990 to 2007
Balashov, Nikolay V.; Thompson, Anne M.; Piketh, Stuart J.; Langerman, Kristy E. (American Geophysical Union, 2014)Surface ozone is a secondary air pollutant formed from reactions between nitrogen oxides (NOx = NO + NO2) and volatile organic compounds in the presence of sunlight. In this work we examine effects of the climate pattern ... -
Uncertainty of dustfall monitoring results
Van Nierop, Martin A.; Piketh, Stuart J.; Van Staden, Elanie; Lodder, Jared (NACA, 2017)Fugitive dust has the ability to cause a nuisance and pollute the ambient environment, particularly from human activities including construction and industrial sites and mining operations. As such, dustfall monitoring has ...