Effect of High-Frequency Sea Waves on Wave Period Retrieval from Radar Altimeter and Buoy Data
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 8168580, Japan
School of Marine Science and Environment Engineering, Dalian Ocean University, Dalian 116023, China
Research Institute for Applied Mechanics, Kyushu University, Fukuoka 8168580, Japan
Author to whom correspondence should be addressed.
Academic Editors: Raphael M. Kudela, Xiaofeng Li and Prasad S. Thenkabail
Received: 4 July 2016 / Revised: 19 August 2016 / Accepted: 12 September 2016 / Published: 17 September 2016
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
is calculated from buoy data, rather than the commonly used zero-crossing wave period
. 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
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.
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MDPI and ACS Style
Wang, X.; Ichikawa, K. Effect of High-Frequency Sea Waves on Wave Period Retrieval from Radar Altimeter and Buoy Data. Remote Sens. 2016, 8, 764.
Wang X, Ichikawa K. Effect of High-Frequency Sea Waves on Wave Period Retrieval from Radar Altimeter and Buoy Data. Remote Sensing. 2016; 8(9):764.
Wang, Xifeng; Ichikawa, Kaoru. 2016. "Effect of High-Frequency Sea Waves on Wave Period Retrieval from Radar Altimeter and Buoy Data." Remote Sens. 8, no. 9: 764.
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