Research on Wind Waves Characteristics by Comparison of Regional Wind Wave Prediction System and Ocean Buoy Data

J. Ocean Eng. Technol. 2010;24(6):7-15.

You Sung-Hyup,Park Jong-Suk

Global Environment Research Division NIMR/KMA,Global Environment Research Division NIMR/KMA

지역 파랑 예측시스템과 해양기상 부이의 파랑 특성 비교 연구

유승협,박종숙

기상청 국립기상연구소 지구환경시스템연구과,기상청 국립기상연구소 지구환경시스템연구과

Keywords: Wind waves, Prediction model, Typhoon

핵심용어: 파랑, 예측 모델, 태풍

Abstract

Analyses of wind wave characteristics near the Korean marginal seas were performed in 2008 and 2009 by comparisons of an operational wind wave forecast model and ocean buoy data. In order to evaluate the model performance, its results were compared with the observed data from an ocean buoy. The model used in this study was very good at predicting the characteristics of wind waves near the Korean Peninsula, with correlation coefficients between the model and observations of over 0.8. The averaged Root Mean Square Error (RMSE) for 48 hrs of forecasting between the modeled and observed waves and storm surges/tide were 0.540 m and 0.609 m in 2008 and 2009, respectively. In the spatial and seasonal analysis of wind waves, long waves were found in July and September at the southern coast of Korea in 2008, while in 2009 long waves were found in the winter season at the eastern coast of Korea. Simulated significant wave heights showed evident variations caused by Typhoons in the summer season. When Typhoons Kalmaegi and Morakot in 2008 and 2009 approached to Korean Peninsula, the accuracy of the model predictions was good compared to the annual mean value.