Characteristic Analysis on the Wind Data in the Pohang Coastal Zone

摘要

The estimation method of the sea wind information using the nearby land wind data have been widely used.However,it is insufficient to examine the limitation of the method based on the characteristics of the wind data.In this study,the characteristics of the wind data are analysed and compared to check the limitation of the existing conventional method.The data are observed at the same time period in the land and sea stations in Pohang coastal zone.In particular,the analysis are focused on the direction data simply overlooked in the analysis target.The method is suggested as a useful tool for the various analysis of the wind direction data.The results show that the statistical informations between the land and sea wind data are quite different though the lineal distance between stations are not large (≒ 3.8 km).The difference is attributed to come from the geometrical gradient and elevation difference between land and sea areas.As a consequence,the quantitative estimation error should be checked preliminarily using the land-sea monitoring data sets because the sea wind estimation using land data is essentially unacceptable.