Sökning: "Samuel Gaita"

Hittade 3 avhandlingar innehållade orden Samuel Gaita.

  1. 1. Air quality assessment and pollution measurements in a typical Sub-Sahara African city: Nairobi, Kenya

    Författare :Samuel Mwaniki Gaita; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Particulate matter pollutants; Source apportionment; Sub-Saharan Africa; deposition fractions;

    Sammanfattning : Exposure to air pollution is detrimental to human health and is reported to cause about 7 million premature deaths in 2012 according to the World Health Organization. In sub-Sahara Africa (SSA) cities, air quality issue is complex due to challenges resulting from the rapid growth of urban population, poor infrastructure development and an exponential increase in number of vehicles. LÄS MER

  3. 2. Airborne particulate matter in a Sub-Saharan Africa city: Nairobi, Kenya, and at an Equatorial high altitude site: Mount Kenya

    Författare :Samuel Mwaniki Gaita; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray Fluorescence XRF ; Particle Induced X-ray Emission PIXE ; Particulate matter pollutants; Source apportionment; sub-Saharan Africa; Deposition fractions; High- altitude; Free troposphere; Spatial distribution;

    Sammanfattning : In Sub-Saharan Africa (SSA), air quality is gravely understudied despite the existing influential factors such a rapid urbanization and population growth that negatively affect the environment. Majority of urban areas in SSA face challenges that include lack of social services, poor infrastructure development, exponential increase of second-hand vehicles and extensive use of biomass-based fuel for energy needs. LÄS MER

  4. 3. Isotopic and Molecular Characterization of Incomplete Combustion Products in sub-Saharan Africa

    Författare :Leonard Kirago; Örjan Gustafsson; Samuel Gaita; Sophie Haslett; Antti Hyvärinen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Air pollution; climate change; savanna; Nairobi; black carbon; Environmental Sciences; miljövetenskap;

    Sammanfattning : Sub-Saharan Africa (SSA) is a global hotspot for incomplete combustion emissions from large-scale savanna fires, agricultural burning and growing city emissions. However, air pollution is understudied in the SSA region, resulting in a gap in the scientific understanding of regional emissions, source contributions, and impacts of air pollutants on regional climate and health. LÄS MER