Sökning: "atmospheric aerosols"

Visar resultat 1 - 5 av 83 avhandlingar innehållade orden atmospheric aerosols.

  1. 1. Physico-chemical properties of atmospheric aerosols in the tropical troposphere

    Författare :Radovan Krejčí; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tropics; Atmosphere; Atmosfären; Tropikerna;

    Sammanfattning : .... LÄS MER

  3. 2. Chemical characteristics of atmospheric aerosols : the influence of natural and man-made sources and sinks

    Författare :Michael Norman; Jost Heintzenberg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Meteorology; Meteorologi; meteorologi; Meteorology;

    Sammanfattning : In order to improve the understanding of the climatic and environmental effects of atmospheric aerosol particles, knowledge about their sources, sinks, chemical and physical characteristics as well as transportation in the atmosphere is needed. This thesis examines the water-soluble chemical characteristics of aerosol particles and precipitation and their interaction with trace gases. LÄS MER

  4. 3. Regional studies of the optical, chemical and microphysical properties of atmospheric aerosols : Radiative impacts and cloud formation

    Författare :Admir Créso Targino; Douglas Nilsson; Radovan Krejci; Richard Leaitch; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; atmospheric aerosols; particles; optical properties; cloud; ice crystals; chemical composition; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap;

    Sammanfattning : Atmospheric particles are ubiquitous in the Earth’s atmosphere and have potential to influence atmospheric chemistry, visibility, global climate and human health, particularly downwind from major pollution sources. The main objective of this thesis was to investigate questions pertaining to the microphysical, chemical and optical properties of aerosol particles by using in situ data collected during four experiments carried out in different regions of the Northern Hemisphere. LÄS MER

  5. 4. Properties and Origin of Arctic Aerosols

    Författare :Ann-Christine Engvall; Jörg Gumbel; Frode Stordal; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic aerosols; Arctic troposphere; air-mass transport; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap; atmosfärvetenskap; Atmospheric Sciences;

    Sammanfattning : The present thesis deals with the origin and physics of aerosols in the Arctic atmosphere. These show a large annual variability due to changes of the photochemical and cloud processes as well as of the synoptic-scale atmospheric pressure patterns. LÄS MER

  7. 5. Nitrogen-containing products from atmospheric oxidation of volatile organic compounds

    Författare :Epameinondas Tsiligiannis; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; VOC; anthropogenic; biogenic; SOA; atmospheric oxidation; organic aerosols; CIMS; FIGAERO; TMB; isoprene; HOM; organonitrates ONs ; NOx; OH; nitrate NO3 ; Go:PAM; SAPHIR;

    Sammanfattning : Atmospheric oxidation of volatile organic compounds (VOC) produces a wide range of oxygenated organic products that lead to formation of secondary organic aerosol (SOA). SOA represents a significant fraction of the tropospheric aerosol that influence climate and human health. LÄS MER