SGER: Short Wind Waves: Shape In Relation To Energy Flux And Wind Stress

SGER：短风浪：形状与能量通量和风应力的关系

• 批准号: 0757290
• 负责人: Charles Cox
• 金额: $ 19.86万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-02-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0757290&HistoricalAwards=false
• 关键词: SGER; Short; Wind; Waves; Shape

Intellectual Merit: Slopes of the wind-blown ocean surface have a nearly Gaussian distribution, but recent satellite observations demonstrate observable non-Gaussian characteristics in the form of skewness and peakedness that vary strongly with wind speed. These properties probably arise from the very shortest gravity and capillary waves on the surface. This project is aimed to identify the wind waves which contribute to the linear increase of mean square slope of the sea surface with wind speed and to identify the non-Gaussian character of the slope distribution. Observational techniques will be developed to find the shape of the sea surface to evaluate slopes and non-Gaussian nature of short waves, and then extending those techniques to identify relations between wave energetics and wind stress. The techniques plan to develop here are promising, though engineering issues are challenging and difficult. In general, the study is exploratory, because it is aimed to quantify short gravity - capillary wave band, mainly due to difficulties associated with measuring O(mm to cm) scale surface waves in the ocean.Broader impacts: The information gain from this study would contribute to direct satellite observations of wind stress, since satellite wind fields are primarily derived from surface roughness or the short gravity - capillary wave characteristics.

智力优点：风吹过的海洋表面的坡度具有接近高斯分布的特征，但最近的卫星观测表明，可观察到的非高斯特征以偏度和峰值的形式存在，随风速的变化而强烈变化。这些特性可能源于表面上最短的重力波和毛细波。 该项目旨在识别导致海面均方斜率随风速线性增加的风浪，并识别斜率分布的非高斯特征。将开发观测技术来寻找海面的形状，以评估短波的坡度和非高斯性质，然后扩展这些技术来确定波浪能量与风应力之间的关系。尽管工程问题充满挑战和困难，但这里计划开发的技术前景广阔。总的来说，这项研究是探索性的，因为它的目的是量化短重力-毛细波波段，这主要是由于测量海洋中O(mm到cm)尺度的表面波存在困难。更广泛的影响：这项研究的信息增益将有助于直接卫星观测风应力，因为卫星风场主要来源于表面粗糙度或短重力-毛细波特征。