Numerical Investigation of Spectral Evolution of Wind Waves. Part I: Wind-Input Source Function
Numerical Investigation of Spectral Evolution of Wind Waves. Part I: Wind-Input Source Function
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DOI：
10.1175/2009jpo4345.1
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发表时间：
2010-04
影响因子：
3.5
通讯作者：
Kakha Tsagareli;A. Babanin;D. Walker;I. Young
中科院分区：
文献类型：
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作者：
Kakha Tsagareli;A. Babanin;D. Walker;I. Young
本文在澳大利亚乔治湖野外观测的基础上，对前人提出的风输入源项Sin的参数化形式进行了研究和定标。本研究的主要目的是获得风输入源函数Sin的谱形式，该函数结合了新的基于观测的特征，同时满足了总集成风输入必须与独立观测的风应力值一致的重要物理约束。在这种方法中，开发了一种新的方法，即动态自调整程序，用于校正风输入源函数Sin。这一修正涉及基于现场数据外推的对增长率γ(f)的频率相关调整。模型结果还表明，微风比强风需要更高的风输入调整率。
Abstract This paper is dedicated to the investigation and calibration of the parameterized form for the wind-input source term Sin proposed earlier on the basis of field observations at Lake George, Australia. The main objective of this study was to obtain spectral forms for the wind-input source function Sin, which incorporates the novel observation-based features and at the same time satisfies the important physical constraint that the total integrated wind input must agree with independently observed magnitudes of the wind stress. Within this approach, a new methodology, a dynamic self-adjusting routine, was developed for correction of the wind-input source function Sin. This correction involves a frequency-dependent adjustment to the growth rate γ( f ), based on extrapolations from field data. The model results also show that light winds require higher-rate adjustments of the wind input than strong winds.