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Abstract

In this study, temporal variation in significant wave height are studied using ERA-Interim reanalysis data from ECMWF (European Centre for Medium-Range Weather Forecasts) for 35 years period from 1980-2014 to support energy assessment in Indonesia Sea. The ERA-Interim reanalysis data provides wind speed and wave height data with resolution of 0,750 x 0,750. This paper studied monthly variation in significant wave height and wind speed by creating monthly data and taking the mean of those months over a period 35 years. A statistical analysis of wave and wind time series data has been performed to test the significance of trend during 35 years period. Mann-Kendall test is used to evaluate the trend of time series data in terms of mean value. The results show that temporal variations in wave height have an associated pattern with monsoonal wind cycle. In addition, the mean significant wave height in the South of Java Sea show statistically significant increasing trend for all months. The result indicated that the wave energy have the potentiality to contribute in the Indonesian energy demand.