Development of an inductive method for estimating momentum flux from winds to ocean waves for advancement of coastal disaster prevention

开发用于估算风到海浪动量通量的归纳方法，以促进沿海防灾

• 批准号: 20360222
• 负责人: HASHIMOTO Noriaki
• 金额: $ 10.82万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20360222/
• 关键词: データ同化; 波浪推算モデル; 大気・海洋間の運動量輸送過程; 非線形相互作用

The sea surface drag coefficient is an important parameter controlling the momentum transfer between the ocean and atmosphere. However, its characteristics under stormy winds are unknown due to difficulty of its observation. In this research, in order to deduce the quantitative characteristics of the sea surface drag coefficient under stormy winds, a new analysis method using a data assimilation method, i.e. 4th dimension variational method, was developed from the viewpoint where an internal structure of a complex natural system can be deduced through a numerical model and observation data. Accuracy and applicability of the method were examined for various conditions. As a result, the inverse estimation of the sea surface drag coefficient under stormy winds, where its observation is extremely difficult, was shown to be possible with the method applying to the wave data observed outside the storm.

海面阻力系数是控制海洋与大气之间动量传递的重要参数。然而，由于观测困难，其在暴风下的特性尚不清楚。本研究为了推导暴风雨下海面阻力系数的定量特征，从通过数值模型和观测数据推导复杂自然系统内部结构的角度出发，提出了一种采用数据同化方法的新分析方法，即四维变分法。在各种条件下检查了该方法的准确性和适用性。结果表明，通过应用于暴风雨外观测到的波浪数据的方法，可以对观测极其困难的暴风雨下的海面阻力系数进行反推算。

项目成果

Development of an Inverse Estimation Method of Sea Surface Drag Coefficient under Strong Wind Conditions.

强风条件下海面阻力系数逆估计方法的发展。

• 发表时间: 2010
• 期刊: Proceedings Of The International Conference On Coastal Engineering No.32
• 作者: 横田雅紀;橋本典明;川口浩二;河合弘泰
• 通讯作者: 河合弘泰

Development of an Inverse Estimation Method of Sea Surface Drag Coefficient under Strong Wind Condition

强风条件下海面阻力系数逆估计方法的研制

• 发表时间: 2011
• 期刊: Proc.32th Int.Conf.Coastal Eng.2010
• 作者: Masaki Yokota;et al.
• 通讯作者: et al.

Real-time Probabilistic Prediction of Storm Water Level at Japanese Ports

日本港口暴雨水位的实时概率预测

• 发表时间: 2009
• 期刊: Proc. of the 19th International Offshore and Polar Engineering Conference
• 作者: 河合弘泰;et al.
• 通讯作者: et al.

非線形相互作用の高精度化が波浪推算に及ぼす影響

更高精度的非线性相互作用对波浪估计的影响

• 发表时间: 2009
• 期刊: 海岸工学論文集 第56巻
• 作者: 橋本典明;川口浩二;鈴山勝之;山城賢;児玉充由
• 通讯作者: 児玉充由

波浪観測の位置が海面抵抗係数の逆推定精度に与える影響について

波浪观测位置对海面阻力系数反演精度的影响

• 发表时间: 2010
• 期刊: 海洋開発論文集 Vol.26
• 作者: Palmeira E. M.;Tatsuoka F.;Bathurst R. J.;Stevenson P. E.;Zornberg J. G.;横田雅紀・橋本典明・西村大右
• 通讯作者: 横田雅紀・橋本典明・西村大右