rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Environmental control of cloud-to-ground lightning polarity in severe storms
  name:
    name part: Buffalo, Kurt Matthew
    name part: 1980-
    role:
      role term: creator
  name:
    name part: Carey, Lawrence D.
    role:
      role term: thesis advisor.
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: txu
    date issued: 2008
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: electronic
    form: remote
  abstract: In this study, it is hypothesized that the mesoscale environment can indirectly control the cloud-to-ground (CG) lightning polarity of severe storms by directly affecting their structural, dynamical, and microphysical properties, which in turn directly control cloud electrification and CG flash polarity. A more specific hypothesis, which has been supported by past observational and laboratory charging studies, suggests that broad, strong updrafts and associated large liquid water contents in severe storms lead to enhanced positive charging of graupel and hail via the noninductive charging mechanism, the generation of an inverted charge structure, and increased positive CG lightning production. The corollary is that environmental conditions favoring these kinematic and microphysical characteristics should support severe storms generating an anomalously high (> 25%) percentage of positive CG lightning (i.e., positive storms), while environmental conditions relatively less favorable should sustain storms characterized by a typical (< and/or =25%) percentage of positive CG lightning (i.e., negative storms). Forty-eight inflow proximity soundings were analyzed to characterize the environments of nine distinct mesoscale regions of severe storms (four positive and five negative) on six days during May - June 2002 over the central United States. This analysis clearly demonstrated significant and systematic differences in the mesoscale environments of positive and negative storms, which were consistent with the stated hypothesis. When compared to negative storms, positive storms occurred in environments associated with a drier low to midtroposphere, higher cloud base height, smaller warm cloud depth, stronger conditional instability, larger 0-3 km AGL wind shear, stronger 0-2 km AGL storm-relative wind speed, and larger buoyancy in the mixed-phase zone, at a statistically significant level. Differences in the warm cloud depth of positive and negative storms were by far the m…
  note: by Kurt Matthew Buffalo.
  note: "Major Subject: Atmospheric Sciences"
  note: Title from author supplied metadata (automated record created on Oct. 13, 2008.)
  note: Vita.
  note: Abstract.
  note: Electronic resource.
  note: Mode of access: World Wide Web.
  note: System requirements: World Wide Web access and Adobe Acrobat Reader.
  note: M. S. Texas A&M University 2007.
  note: Includes bibliographical references.
  note: Text (M. S.).
  subject:
    topic: Major atmospheric sciences
  subject:
    topic: lightning
  subject:
    topic: polarity
  subject:
    topic: thunderstorms
  subject:
    topic: environmental conditions
  subject:
    topic: storms
  subject:
    topic: mesoscale
  subject:
    topic: severe
  identifier: http://hdl.handle.net/1969.1/85783
  record info:
    record content source: TXA
    record creation date: 090403
    record change date: 20151110090356.0
    record identifier: in00002421993