Genesis and Structure of a Major Tornado in a Numerically-Simulated Supercell Storm: Importance of Vertical Vorticity in a Gust Front

• T. Noda Akira

  Ocean Research Institute,The University of Tokyo Department of Geophysics, Graduate School of Science, Tohoku University

• Niino Hiroshi

  Ocean Research Institute,The University of Tokyo

抄録

A major tornado spawned by a supercell is reproduced by a fine-resolution three-dimensional numerical simulation, and its genesis mechanism and structure are clarified. The tornado, which is associated with a maximum vertical vorticity of 0.85 s^-1 and a pressure drop of 27 hPa, originates from one of the small-scale vortices on the gust front that forms between a warm moist environmental air and a rain-cooled air produced by the storm. Only the small-scale vortex that develops into a major tornado is located right under the low-level updraft associated with the low-level mesocyclone; the others that fail to develop are not. Several interesting previously-unexamined characteristics of the threedimensional structure of the simulated tornado vortex are also reported.

収録刊行物

• SOLA

  SOLA 1 5-8, 2005

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390282680199998080
• NII論文ID: 130004448351
• NII論文ID: 80018140385
• DOI: 10.2151/sola.2005-002
• ISSN: 13496476
• Web Site: http://www.jstage.jst.go.jp/article/sola/1/0/1_0_5/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可