<学術雑誌論文>
Effect of High-Frequency Sea Waves on Wave Period Retrieval from Radar Altimeter and Buoy Data

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概要 Wave periods estimated from satellite altimetry data behave differently from those calculated from buoy data, especially in low-wind conditions. In this paper, the geometric mean wave period Ta is cal...culated from buoy data, rather than the commonly used zero-crossing wave period Tz . The geometric mean wave period uses the fourth moment of the wave frequency spectrum and is related to the mean-square slope of the sea surface measured using altimeters. The values of Ta obtained from buoys and altimeters agree well (root mean square difference: 0.2 s) only when the contribution of high-frequency sea waves is estimated by a wavenumber spectral model to complement the buoy data, because a buoy cannot obtain data from waves having wavelengths that are shorter than the characteristic dimension of the buoy.続きを見る

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登録日 2019.04.09
更新日 2023.08.18

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