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首页> 外文期刊>Weather and forecasting >Sea waves generated by extratropical cyclones in the South Atlantic Ocean: Hindcast and validation against altimeter data
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Sea waves generated by extratropical cyclones in the South Atlantic Ocean: Hindcast and validation against altimeter data

机译：南大西洋温带气旋产生的海浪：后播和针对高度计数据的验证

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摘要

This work presents analyses of the atmospheric conditions and the hindcast of the surface wave field when six extratropical cyclones formed and displaced over the South Atlantic Ocean (10degreesN, 60degreesS; 75degreesW, 15degreesE) between April and September 1999. These events caused high sea waves associated with hazardous conditions along the south and southeast coast of Brazil. The meteorological composite fields for these cyclones show a strong near-surface wind velocity (up to 14 m s(-1)) during its mature phase. The sea-state wave hindcast was obtained using a third-generation wave model forced by the 10-m above ground level wind field from the National Centers for Environmental Prediction-National Center for Atmospheric Research reanalysis dataset. Closer to the south and southeast Brazilian coast, the hindcast results showed significant wave heights of up to 5 m in some of the events. The wave hindcast results for the significant wave height were compared against satellite altimeter data at 6 h intervals. The statistical index showed a systematic underestimation of the significant wave height by 0.5 m. The correlation between wave hindcast and altimeter measurements was greater than 90%, showing a good phase reproduction by the wave model.
机译：这项工作介绍了在1999年4月至9月之间在南大西洋（10°N，60°S; 75°W，15°E）上形成并移位了六个温带气旋时，大气情况和地表波场的后兆。这些事件引起了相关的高海浪在巴西南部和东南沿海地区处于危险状态。这些旋风的气象复合场在其成熟阶段显示出很强的近地表风速（最高14 m s（-1））。使用由国家环境预测中心-国家大气研究中心的再分析数据集在地面高10m的风场强迫下的第三代波浪模型获得海浪后兆。在一些事件中，更接近巴西南部和东南部巴西海岸的后预报结果显示，其最大波高高达5 m。在6 h的时间间隔内，将重要波高的波后预报结果与卫星高度计数据进行了比较。统计指标显示有效波高被系统低估了0.5 m。波后预报与高度计测量之间的相关性大于90％，表明该波模型具有良好的相位再现性。

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