Browsing by Subject "Welgegund"
Now showing items 1-10 of 13
-
Aerosol optical properties at a savannah grassland site in South Africa
(North-West University (South Africa), 2020)Atmospheric aerosols affect the earth’s radiative budget in two ways: firstly, particles directly absorb and scatter short- and long-wave radiation and, secondly, particles indirectly influence the lifetime and physical ... -
Applicability of analytical techniques to quantify trace metals in particulate matter for source apportionment in South Africa
(North-West University (South Africa), 2020)The impacts of atmospheric trace metal species in particulate matter (PM) on human health and the environment is well documented. Rapid advances in the development of analytical techniques used for characterisation and ... -
Assessment of polar organic aerosols at a regional background site in southern Africa
(Springer, 2019)A recent paper reported GCxGC-TOFMS analysis used for the first time in southern Africa to tentatively characterise and semi-quantify ~1000 organic compounds in aerosols at Welgegund – a regional background atmospheric ... -
Background ambient atmospheric mercury concentrations for the South African interior
(North-West University (South Africa), 2021)Atmospheric mercury (Hg) pollution is a global health concern. Once emitted into the atmosphere, gaseous elemental mercury (Hg0) can be converted to highly reactive gaseous oxidised mercury (Hg2+), which is deposited to ... -
Characterisation of air masses passing over the Vredefort Dome world heritage site
(North-West University (South Africa), 2015)In 2007, it was announced that the Vredefort Dome will be proclaimed South Africa’s seventh UNESCO (United Nations Educational, Scientific and Cultural Organisation) world heritage site. It is the largest and second oldest ... -
Characterising particulate organic nitrogen at a savannah-grassland region in South Africa
(MDPI, 2019)Although atmospheric organic N compounds are considered to be important, especially in new particle formation and their contribution to brown carbon, these species are not that well understood. This can be partially ... -
Factors governing rain chemistry and wet deposition at a regional background site in South Africa
(North-West University (South Africa), 2020)Wet deposition is an atmospheric sink that is essential to sustain the Earth-atmosphere biogeochemical balance. Deposited species can either be introduced as nutrients or toxins into a surface environment, which can be ... -
Measurement of organic compounds in atmospheric aerosols collected at Welgegund, South Africa
(North-West University, 2018)Atmospheric aerosols or particulate matter (PM) are a complex mixture of solid and liquid particulates suspended in the atmosphere that originate from natural and anthropogenic sources. These species influence climate ... -
Receptor modelling and risk assessment of volatile organic compounds measured at a regional background site in South Africa
(Elsevier, 2018)Volatile organic compounds (VOCs) can have significant impacts on climate and human health. Certain VOCs are proven to be carcinogenic and toxic, which can affect human health directly and indirectly. In order to develop ... -
Size-resolved characterisation of organic compounds in atmospheric aerosols collected at Welgegund, South Africa
(Springer, 2015)The organic fraction of atmospheric aerosols is 20 to 90 % of which only a small percentage has been chemically characterised. Two-dimensional gas chromatography with a time-of-flight mass spectrometer (GCxGC-TOFMS) is a ...