Hierarchical unstable structures in atmospheric general circulation

• Project/Area Number: 19740297
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Doshisha University (2008); Chiba Institute of Science (2007)
• Principal Investigator: YAMANE Shozo Doshisha University, 理工学部, 准教授 (10373466)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,100,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,800,000 (Direct Cost: ¥1,800,000)
• Keywords: 気象学 / 大気現象 / 予測可能性 / 不安定 / アンサンブル / 大気大循環モデル / リアプノフ指数 / 階層構造 / リアブノフ指数

Research Abstract

地球を取り巻く大気の運動は不規則であり、様々な時間・空間スケールの現象が存在する。このような大気場の中で発達する微小な擾乱の地理的分布・空間構造の特徴を大気大循環モデルの数値実験を通して調べた結果、擾乱のエネルギーが比較的小さいときは熱帯の対流活動に伴う擾乱の発達が顕著となり、擾乱のエネルギーが比較的大きいときは中緯度帯の移動性高・低気圧に伴う擾乱の発達が顕著となる傾向があることが分かった。

Research Products

• [Journal Article] Impact of observations from Arctic drifting buoys on the reanalysis of surface fields (2009)
  • Author(s): Inoue, J., T. Enomoto, T Miyoshi, and S. Yamane
  • Journal Title: Geophysical Research Letters 36, L08501
  • Peer Reviewed
• [Journal Article] Local ensemble Kalman filtering with an AGCM at a T159/L48 resolution (2007)
  • Author(s): Takemasa Miyoshi and Shozo Yamane
  • Journal Title: Monthly Weather Review 135,11 Pages: 3841-3861
  • Peer Reviewed
• [Journal Article] Localizing the error covariance by physical distances with a local ensemble transform Kalman filter (LETKF) (2007)
  • Author(s): Takemasa Miyoshi, Shozo Yamane, and Takeshi Enomoto
  • Journal Title: Scientific Online Letters on the Atmosphere 3 Pages: 89-92
  • Peer Reviewed
• [Journal Article] Local ensemble Kalman filtltering with an AGCM at a T159/L48 resolution (2007)
  • Author(s): Takemasa Miyoshi and Shozo Yamane
  • Journal Title: Monthly Weather Review 135,11 Pages: 3841-3861
  • Peer Reviewed
• [Journal Article] Localizing the error covariance by physical distances within a local ensemble transform Kalman filter (LETKF) (2007)
  • Author(s): Takemasa Miyoshi, Shozo Yamane and Takeshi Enomoto
  • Journal Title: Scientific Online Letters on the Atmosphere 3 Pages: 89-92
  • NAID: 130004448434
  • Peer Reviewed
• [Journal Article] Impact of observations from Arctic drifting buoys on the reanalysis of surface fields
  • Author(s): Jun Inoue, Takeshi Enomoto, Takemasa Miyoshi, and Shozo Yamane
  • Journal Title: Geophysical Research Letters
• [Presentation] 実験的再解析データALERAの解析誤差分布の特徴について (2008)
  • Author(s): 山根省三
  • Organizer: 日本気象学会2008年度秋季大会
  • Place of Presentation: 仙台
  • Year and Date: 2008-11-21