ゴルフストリームとキュロシオ流が同期している
Tsubasa Kohyama1, Yoko Yamagami2, Hiroaki Miura3
1Department of Information Sciences, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan.
まとめ
主要な海流における海面温度は10年単位で同期し,境界流同期 (BCS) と呼ばれる現象である. この気候パターンは 大気中のジェットストリームと空気と海の相互作用によるものです
科学分野:
- 海洋学
- 気候科学
- 大気科学
背景:
- ゴルフストリームやクルシオ流のような主要な境界流に沿った海面の温度は,同期した10年間の変動を示しています.
- この同期は,境界流同期 (BCS) と呼ばれ,気候システムダイナミクスの顕著な特徴です.
研究 の 目的:
- 境界電流同期 (BCS) の現象を調査する.
- 海流と大気ジェットストリームと 海面の温度間の相関性を理解するために
- BCSが気候モデルで再現可能かどうかを判断し,その基礎となるメカニズムを特定する.
主な方法:
- 海面温度に関する観測データの分析
- 高解像度の地球気候モデルシミュレーションを用いた検証
- 概念モデルと大気一般循環モデルによる数値シミュレーション
主要な成果:
- 限界電流同期 (BCS) は気候モデルで正確に再現されています.
- BCSは大気のジェットストリームのメリディアン移動と強く関連しています.
- ジェットストリームの変化に起因する 海流の強さと経路の変化は 海面の温度を同期させます
- シミュレーションでは,BCSが海と空間のコップルモードとしてサポートされています.
結論:
- 境界流同期 (Boundary current synchronization,BCS) は,空気と海の相互作用によって引き起こされる強力な気候現象である.
- 大気のジェットストリームの変動は,境界流における10年間の海面温度同期を媒介する上で重要な役割を果たします.
- 大規模な気候の変動と 遠隔接続の理解を深めています
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