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Asymmetrical wind and surface mean square slope correlation observed in Hurricane Ike

机译：在飓风艾克中观测到的不对称风和地面均方斜率相关

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This paper analyzes and compares multiple techniques for estimating the mean square slope (MSS) of surface waves during Hurricane Ike in the Gulf of Mexico and studies the correlation of these estimates with co-located independent surface wind measurements. The measurements used in this analysis include a GPS reflections instrument, a Scanning Frequency Microwave Radiometer (SFMR), a Wide Swath Radar Altimeter (WSRA), and HWinds modeled wind fields. These data sets were used to study the correlation between the near-surface wind and waves during Hurricane Ike in 2008. The GPS-R, SFMR and WSRA instruments recorded temporally and spatially coincident data during two passes over the hurricane eye. This paper estimates the ocean surface waves mean square slope using GPS-R for two eye transects using: a) a least squares model fitting technique; b) a model-based waveform width method; and c) a model-based integration of the area around the reflection peak. Subsequently, the correlation between the GPS-R MSS estimates and the SFMR wind speed estimates are compared to reveal regions of high and low wind/wave correlation. Subsequently, the correlation of MSS estimates from the higher frequency WSRA instrument and SFMR wind estimates are calculated. It has been found that (generally) the wind and wave correlation is significantly better on the western side of the storm during both hurricane eye transects. A relationship between wind and waves was then derived from the GPS-R and SFMR data and is compared to existing wind/wave models, including the results obtained by Katzberg et al and with the Elfouhaily et al theoretical model.
机译：本文分析并比较了多种估算墨西哥湾艾克飓风期间地表波均方斜率（MSS）的技术，并研究了这些估算值与并置独立地表风测量的相关性。此分析中使用的测量包括GPS反射仪，扫描频率微波辐射仪（SFMR），宽幅雷达高度计（WSRA）和HWinds建模的风场。这些数据集用于研究2008年飓风艾克期间近地表风与海浪之间的相关性。GPS-R，SFMR和WSRA仪器记录了飓风眼两次经过时空和空间上的重合数据。本文使用GPS-R估计了两个眼睛样线的海洋表面波均方斜率，方法是：a）最小二乘模型拟合技术； b）基于模型的波形宽度方法； c）反射峰周围区域的基于模型的积分。随后，将GPS-R MSS估计值与SFMR风速估计值之间的相关性进行比较，以揭示高/低风/波相关性的区域。随后，计算了来自较高频率WSRA仪器的MSS估计值与SFMR风估计值之间的相关性。已经发现（通常）在两个飓风眼断面期间，风暴的西侧的风浪相关性明显更好。然后从GPS-R和SFMR数据中得出风与波之间的关系，并将其与现有的风/波模型进行比较，包括由Katzberg等人和Elfouhaily等人的理论模型获得的结果。

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