Shared more. Cited more. Safe forever.
    • advanced search
    • submit works
    • about
    • help
    • contact us
    • login
    View Item 
    •   MOspace Home
    • University of Missouri-Columbia
    • Graduate School - MU Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Theses (MU)
    • 2007 Theses (MU)
    • 2007 MU theses - Access restricted to UM
    • View Item
    •   MOspace Home
    • University of Missouri-Columbia
    • Graduate School - MU Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
    • Theses (MU)
    • 2007 Theses (MU)
    • 2007 MU theses - Access restricted to UM
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    advanced searchsubmit worksabouthelpcontact us

    Browse

    All of MOspaceCommunities & CollectionsDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis SemesterThis CollectionDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis Semester

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular AuthorsStatistics by Referrer

    A study of lightning flashes attending periods of banded heavy snowfall

    Becker, Amy E.
    View/Open
    [PDF] public.pdf (10.64Kb)
    [PDF] short.pdf (10.64Kb)
    [PDF] research.pdf (1.751Mb)
    Date
    2007
    Format
    Thesis
    Metadata
    [+] Show full item record
    Abstract
    [ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Lighting[sic] flashes associated with 24 banded thundersnow events were analyzed to document their polarity, signal strength, and multiplicity. Radar reflectivity values were recorded at each lighting flash, as well as the maximum radar reflectivity within the associated snow band. The preferred location of the lightning activity within the snow band was also noted as being either leading edge (LE), trailing edge (TE), core (C), or not correlated (NC). Vertical profiles of radar reflectivity at the location of each lightning flash were generated using the Warning Decision Support System (WDSS), looking for pronounced convective signatures. Reflectivity values at each height were recorded and used to construct a composite vertical profile of winter convection near each flash. Additionally, the height of the -10 [degree sign]C isotherm for each of these lightning flashes was obtained from skew-T log-p analysis. This level is considered critical for charging processes in winter clouds, and its height has been shown to have a strong influence over the generation of winter lightning. The radar reflectivity at the height of the -10 [degree sign]C level was taken from the WDSS analysis to determine the average radar reflectivity at the height of the -10 [degree sign]C isotherm. In the central United States, a preference for negatively charged lighting was found for winter convection, which stands in contrast to the majority of the research done on winter convection in Japan. Single and multi-banded structures were observed to be a dominant feature of thundersnow events. The most pronounced location for a lighting discharge was found to occur in the core section of the band, while the majority of lightning activity was found on the leading edge of the highest areas of radar reflectivity within the snow bands. The average height of the -10 [degree sign]C isotherm was found to be 3872 m above ground level (AGL), with a corresponding radar reflectivity of ~ 22 dBZ. Although neither slantwise nor upright precipitation were the dominant type of precipitation systems found in thundersnow cases, the radar reflectivity within convective snow systems was found to be higher than typical winter-time snow storms.
    URI
    https://hdl.handle.net/10355/6036
    https://doi.org/10.32469/10355/6036
    Degree
    M.S.
    Thesis Department
    Soil, environmental and atmospheric sciences (MU)
    Rights
    Access is limited to the campuses of the University of Missouri.
    Collections
    • 2007 MU theses - Access restricted to UM
    • Soil, Environmental and Atmospheric Sciences electronic theses and dissertations (MU)

    Send Feedback
    hosted by University of Missouri Library Systems
     

     


    Send Feedback
    hosted by University of Missouri Library Systems