Responses of Oceanic Double-Gyre to External Wind Forcing with Noise

• SHIMOKAWA Shinya

  National Research Institute for Earth Science and Disaster Prevention

• SHIRATORI Kenta

  University of Toyama

• MATSUURA Tomonori

  University of Toyama

抄録

Stochastic resonance, in which a type of noise amplifies weak signals, has been observed in various fields, however, its oceanic applications have not been investigated in detail. Therefore, in this study, we examined basic responses of oceanic double-gyre to constant external wind forcing with noise generated by the Ornstein-Uhlenbeck equation by using a 1.5 layer quasi-geostrophic model. For cases with adequate noise, potential signals in the system appear at the front as actual signals such as intermittent large variations in energy. In addition, the flow patterns show intense meandering of strong current extension. These variations are more frequent and stronger for cases with long decorrelation time than for cases with short decorrelation time although intermittent variations can be observed even for cases with white noise.

収録刊行物

• Theoretical and Applied Mechanics Japan

  Theoretical and Applied Mechanics Japan 62 (0), 49-57, 2014

  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: 1390001205210073856
• NII論文ID: 130004463874
• DOI: 10.11345/nctam.62.49
• ISSN: 13494244
• ISSN: 13480693
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可