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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25432

Title: Seasonal variations of wind and waves over Taiwan waters
Authors: Beng-Chun Lee;Li-Chung Wu;Dong-Jiing Doong;Chia Chuen Kao
Contributors: NTOU:Department of Marine Environmental Informatics
Keywords: Seasonal variations;Long-period oscillation;Spectrum Wavelet transform
Date: 2007-09
Issue Date: 2011-10-20T08:23:12Z
Publisher: Marine Geophysical Researches
Abstract: abstract:We here investigate the frequency and intensity of oscillations in oceanographic data within intraseasonal time scales using spectral analysis of surface wind and wave time-series data collected at off-island weather stations or moored buoys around Taiwan. Data from marine weather stations were used to trace atmospheric conditions, while we used buoy data to examine sea states. The spectra and wavelet scalogram of the wind fields revealed oscillations with a period of around 20–33 days, and the energy density of the wind field at the off-island stations was stronger than that at the data buoy stations. However, the wavelet scalogram of the wave height measured at the buoy stations was stronger than its associated wind field. This long-period oscillation is consistent with the wavelet scalogram of the wind field calculated from the off-island weather stations. About 20–33 day oscillations exist within intraseasonal variations, which are closely linked to the atmospheric environment and to wind and ocean wave fields. Oscillations with a period of 5–10 days are a pronounced feature over northeastern Taiwan waters during the winter season and can be interpreted as the wave pattern following synoptic weather systems.
Relation: 28(3), pp.183-190
URI: http://ntour.ntou.edu.tw/handle/987654321/25432
Appears in Collections:[海洋環境資訊系] 期刊論文

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