Sökning: "soot concentrations"

Visar resultat 1 - 5 av 13 uppsatser innehållade orden soot concentrations.

  1. 1. Carbonaceous aerosols and trace metal deposition in high-latitude snow : a comparative study in Sweden and Alaska

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Anika Pinzner; [2019]
    Nyckelord :PM; carbon particles; pXRF; arctic; subarctic; EC OC; LAHM; PSAP; TOT; ICP-MS; filter; contamination; albedo;

    Sammanfattning : This study investigates the advantages and disadvantages of several destructive and non-destructive analytical methods that can be employed to characterize airborne par-ticulate matter (PM) deposited in seasonal snow. To this end, a comparative study was conducted on PM obtained from snowpack surveys in two Arctic/subarctic regions of Northern Sweden and Interior Alaska, USA. LÄS MER

  3. 2. Characterizing particulate carbon using dielectric property measurements

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Madeleine Syk; Joakim Vollmer; [2018]
    Nyckelord :black carbon; elemental carbon; carbonaceous aerosols; soot; fullerene C60; multiwalled carbon nanotubes; mesoporous carbon; impedance; dielectric; snow melting; capacitance; waveguide;

    Sammanfattning : Interest in effects of carbonaceous particles in the atmosphere has recently taken an upswing due to knowledge of how these particles affect our environment. Carbonaceous aerosols are characterized by their dark color, giving them the ability to absorb both incoming and outgoing radiation of all wavelengths in the atmosphere. LÄS MER

  4. 3. Atmospheric Particles in Kermanshah, Iran

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Rebecka Häggström; [2017]
    Nyckelord :aerosols; aerosol technology; SMPS; soot concentrations; dust; Iran; Kermanshah; PSAP; airborne particles; Technology and Engineering; Physics and Astronomy; Earth and Environmental Sciences;

    Sammanfattning : No measurements of airborne particles have been done in Iran previously. Starting characterization of aerosol particles in a completely new geographical area, a suitable and important measurement parameter is the aerosol particle number size distribution. This can be used to indirectly infer climate- and health effects of the particles. LÄS MER

  5. 4. Spatiotemporal reconstructions of black carbon, organic matter and heavy metals in coastal records of south-west Sweden

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Marcus Rudolf; [2016]
    Nyckelord :organic matter; spheroidal carbonaceous particles; black carbon; geology; physical geography; Ecosystem analysis; heavy metals; coastal sediments; Sweden; Earth and Environmental Sciences;

    Sammanfattning : This study presents reconstructions of black carbon (BC), including spheroidal and amorphous carbonaceous particles (SCP and ACP), organic matter (OM; total organic carbon, TOC; total nitrogen, TN; total sulfur, TS), and heavy metals (Fe, Zn, Pb, Cu, As and Hg) in coastal sediments off the south-west coast of Sweden. Sediment records from eight stations along a north-south transect off the south-west of Sweden were retrieved. LÄS MER

  7. 5. Distribution of black carbon and its impact on Eutrophication in Lake Victoria

    Master-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :Moses Odhiambo; Joyanto Routh; [2016]
    Nyckelord :Lake Victoria; Eutrophication; Biomass burning; Black Carbon;

    Sammanfattning : Lake Victoria (LV), is the largest tropical fresh water lake. It is however facing a myriad of challenges like eutrophication, introducing species, mass extinction and climate change. Eutrophication has mostly been seen as a result of non-point pollution from upstream agricultural areas. LÄS MER