Sökning: "dust provenance"

Hittade 4 uppsatser innehållade orden dust provenance.

  1. 1. Single-Grain Zircon U-Pb Dating and Magnetic Susceptibility of Polish Loess to Determine Late Quaternary Dust Provenance and Paleoclimate

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Engström Johansson; [2018]
    Nyckelord :dust provenance; Polish loess; paleoclimate; single-grain zircon U-Pb dating; magnetic susceptibility; härkomstområden för atmosfäriskt stoft; polsk lössjord; paleoklimat; U-Pb datering av zirkoner; magnetisk susceptibilitet;

    Sammanfattning : Windblown mineral dust has accumulated into thick loess layers across the European continent. Loess deposits are valuable paleoclimatic archives as they record climate change on centennial- to glacialinterglacial timescales. LÄS MER

  3. 2. Influence of Sample Preparation on Portable XRF-analyses of Aeolian Sediments: a Case Study

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Markus L. Fiola; [2017]
    Nyckelord :portable XRF; loess; sediment; bärbar XRF; lössjord; sediment;

    Sammanfattning : The geochemical composition of aeolian sediments like windblown dust particles is of major importance for the exploration of dust origin and weathering conditions. This allows for the reconstruction of dust transport pathways and thus wind directions and palaeoclimate conditions. LÄS MER

  4. 3. Using Bulk XRF-Analysis of Chinese Loess to Determine High-Resolution Records of Dust Provenance

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Alexandra Engström Johansson; [2017]
    Nyckelord :dust; provenance; elemental ratios; Chinese Loess Plateau;

    Sammanfattning : Understanding the sources of the dust that forms the extensive loess deposits on the Chinese Loess Plateau is crucial for reconstructing atmospheric circulation patterns and dust pathways. Dust sources are however highly debated, mainly due to the low resolution of many records and the often ambiguous nature of geochemical proxies. LÄS MER

  5. 4. Analys av ursprunget på löss från sen Pliocen – tidig Kvartär i Kina

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Kevin Pettersson; [2017]
    Nyckelord :loess; source; correlation; ratio; löss; källa; korrelation; förhållande;

    Sammanfattning : The boundary between the Pliocene and the Quaternary marks a major transition in Earth’s climate, before which relatively warm climate prevailed and after which large scale glaciation of the Northern Hemisphere developed. In China a record of windblown dust deposits on the Chinese loess plateau forms loess sequences. LÄS MER