Representation and Localization of Gusty Winds Induced by Misocyclones with a High-Resolution Meteorological Modeling

• TAKEMI Tetsuya

  Disaster Prevention Research Institute, Kyoto University

• KUSUNOKI Kenichi

  Meteorological Research Institute

• ARAKI Keiji

  Railway Technical Research Institute

• IMAI Toshiaki

  Railway Technical Research Institute

• BESSHO Kotaro

  Meteorological Research Institute

• HOSHINO Shunsuke

  Meteorological Research Institute

• HAYASHI Syugo

  Meteorological Research Institute

抄録

The present study numerically simulates the development and evolution of a line of misocyclones embedded in winter convective storms and examines the representation and localization of surface strong winds due to the misocyclones by conducting high-resolution simulations. A case on 2 December 2007 over the Shonai Plains is chosen for the present analysis. The 120-m grid simulation well represents well-defined multiple misocyclones in a cloud band, where horizontal wind shear is significant. Since the environmental low-level atmosphere is very unstable owing to cold air over the warm ocean, the strength of convective clouds is significant enough to enhance the misocyclones. The present simulation captures observed high wind speeds and their local scales due to the strong misocyclones. A finer-grid (i.e., 80 m) simulation, however, does not better resolve and represent the vortices and associating gusty winds. These contrasting results suggest that the representation of meteorological disturbances that spawn them is primarily important.

収録刊行物

• Theoretical and Applied Mechanics Japan

  Theoretical and Applied Mechanics Japan 58 (0), 121-130, 2010

  日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」

詳細情報

• CRID: 1390001205210651904
• NII論文ID: 130004463728
• DOI: 10.11345/nctam.58.121
• ISSN: 13494244
• ISSN: 13480693
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • Crossref
• 抄録ライセンスフラグ: 使用不可