Evaluation and Validation of HF Radar Swell and Wind wave Inversion Method
Evaluation and Validation of HF Radar Swell and Wind wave Inversion Method
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DOI：
10.1175/jtech-d-20-0186.1
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发表时间：
2021-07
影响因子：
2.2
通讯作者：
Zaid R. Al-Attabi;G. Voulgaris;D. Conley
中科院分区：
文献类型：
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作者：
Zaid R. Al-Attabi;G. Voulgaris;D. Conley
检验的适用性和准确性的经验波反演方法中存在的涌浪。利用12 MHz WERA高频（HF）雷达系统的一个月数据和波浪浮标的现场数据，研究了该方法将多普勒谱反演为波浪方向谱和体波参数的能力。评估了三种不同的膨胀反演模型：LPM（利帕等人，1981年）、WFG（Wang等人，2016年）和EMP（本研究中引入的经验方法）。使用两种不同的方案进行涌浪反演：（1）来自单个雷达站点的单个波束和来自单个雷达站点的两个波束，以及（2）来自两个站点的两个波束（每个站点一个波束）在浮标位置处彼此相交。使用来自两个不同站点的两个波束的LPM方法被发现提供了膨胀参数的最佳估计（膨胀高度RMS误差0.24 m），并显示出与分区膨胀原位值的良好相关性。对于风浪反演，这里提出的经验方法与经验系数为0.3，这似乎是适合于所有的雷达工作频率的普遍应用。反演的涌浪参数用于创建涌浪谱，该涌浪谱与反演的风浪谱组合以创建全方向海浪谱。在这项研究中提出的波反演方法，虽然经验，不需要在现场数据校准，可以应用到任何波束形成系统和工作频率。
An examination of the applicability and accuracy of the empirical wave inversion method in the presence of swell waves is presented. The ability of the method to invert Doppler spectra to wave directional spectra and bulk wave parameters is investigated using one-month data from a 12 MHz WERA High Frequency (HF) radar system and in-situ data from a wave buoy. Three different swell inversion models are evaluated: LPM (Lipa et al. 1981), WFG (Wang et al. 2016) and EMP, an empirical approach introduced in this study. The swell inversions were carried out using two different scenarios: (1) a single beam from a single radar site and two beams from a single radar site, and (2) two beams from two sites (a single beam per site) intersecting each other at the buoy location. The LPM method utilized using two beams from two different sites was found to provide the best estimations of swell parameters (swell height RMS error 0.24m) and showed a good correlation with the partitioned swell in-situ values. For the wind wave inversion, the empirical method presented here is used with an empirical coefficient of 0.3 which seems to be suitable for universal application for all radar operating frequencies. The inverted swell parameters are used to create a swell spectrum which is combined with the inverted wind wave spectrum to create a full directional wave spectrum. The wave inversion method presented in this study although empirical does not require calibration with in situ data and can be applied to any beam forming system and operating frequency.