Snow patch influence on 7 heavy metal concentrations in top soil at Kevo Subarctic Research Station, Finnish Lapland

Crutcher, Andrew (2007) Snow patch influence on 7 heavy metal concentrations in top soil at Kevo Subarctic Research Station, Finnish Lapland. BSc dissertation, University of Portsmouth.

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    Abstract

    Soil and snow samples were collected from late lying Snow patch sites in the vicinity of Kevo Subarctic Research Station. Soil samples were also collected from control sites to which comparisons could be made. Total concentrations of Cadmium, Lead, Zinc, Chromium, Copper, Iron and Nickel in snow and soil samples were determined through pseudo-total analysis by an aqua-regia extraction and AAS analysis. Metals were found in high concentrations in and on the surface of snow patches. Differences in the proportion of concentrations within and on the snow's surface suggests that atmospheric deposition of Copper, Iron and Nickel comes from dry deposition, whereas the other metals wet deposition is more likely. Mean concentrations of all metals except Cadmium were found to be significantly higher at snow patch sites by comparison to control sites. This pattern broke down at more local scales suggesting local enhanced weathering from Snow patches, vegetation and parent material are important factors in variation. However Copper and Nickel concentrations are shown to be most likely derived from atmospheric deposition onto Snow patches from industrialised areas in close proximity to the study area.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Science > Department of Geography
    Depositing User: Jane Polwin
    Date Deposited: 20 Jan 2011 12:48
    Last Modified: 28 Jan 2015 11:14
    URI: http://eprints.port.ac.uk/id/eprint/393

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