Browsing by Author "Jaars, K."

Now showing items 1-6 of 6

    • Ambient aromatic hydrocarbon measurements at Welgegund, South Africa 

      Jaars, K.; Beukes, J.P.; Van Zyl, P.G.; Venter, A.D.; Josipovic, M.; Pienaar, J.J.; Tiitta, P.; Laakso, L. (EGU, 2014)
      Aromatic hydrocarbons are associated with direct adverse human health effects and can have negative impacts on ecosystems due to their toxicity, as well as indirect negative effects through the formation of tropospheric ...

    • Characterization of satellite-based proxies for estimating nucleation mode particles over South Africa 

      Sundström, A.-M.; Laakso, L.; Beukes, J.P.; Van Zyl, P.G.; Josipovic, M.; Venter, A.D.; Jaars, K.; Pienaar, J.J.; Piketh, S.; Chiloane, E.K. (EGU, 2015)
      Proxies for estimating nucleation mode number concentrations and further simplification for their use with satellite data have been presented in Kulmala et al. (2011). In this paper we discuss the underlying assumptions ...

    • Chemical composition, main sources and temporal variability of PM1 aerosols in southern African grassland 

      Tiitta, P.; Beukes, J.P.; Van Zyl, P.G.; Josipovic, M.; Venter, A.D.; Jaars, K.; Pienaar, J.J.; Laakso, L. (EGU, 2014)
      Southern Africa is a significant source region of atmospheric pollution, yet long-term data on pollutant concentrations and properties from this region are rather limited. A recently established atmospheric measurement ...

    • Estimating the concentration of nucleation mode aerosol particles over South Africa using satellite remote sensing measurements 

      Sundström, A.-M.; Laakso, L.; Beukes, J.P.; Van Zyl, P.G.; Josipovic, M.; Venter, A.D.; Jaars, K.; Pienaar, J.J.; Piketh, S.; Chiloane, E.K. (AIP Publishing, 2013)
      In this work satellite based observations were used to estimate the concentration of nucleation mode aerosols over South Africa. The nucleation mode aerosols can not be detected directly with satellite instruments since ...

    • Factors governing the chemical composition of rain at a regional site in South Africa 

      Kok, L; Van Zyl, P.G.; Beukes, J.P.; Burger, R.P.; Ellis, S.M.; Josipovic, M.; Jaars, K.; Vakkari, V.; Laakso, L.; Kulmala, M. (ScienceDirect, 2023)
      Precipitation chemistry is influenced by a number of complex processes, which include the temporal and spatial evolution of air masses. Previous wet deposition studies in South Africa could not distinctly relate the ...

    • Plume characterization of a typical South African braai 

      Venter, A.D.; Jaars, K.; Booyens, W.; Beukes, J.P.; Van Zyl, P.G.; Josipovic, M.; Hendriks, J.; Laakso, L. (SACI, 2015)
      To braai is part of the South African heritage that transcends ethnic barriers and socio-economic groups. In this paper, a comprehensive analysis of atmospheric gaseous and aerosol species within a plume originating from ...