ESTIMATING ACCURACY OF MSM-BASED WINDS DATA BY JMA USING BUOY-BASED MEASUREMENT WINDS DATA AT OFFSHORE STATIONS AROUND KOREA

Abstract

 For further accuracy verification of MSM(Meso Scale Model)-based winds data samples released by JMA(Japan Meteorological Agency), buoy-based measurement data samples acquired by KMA(Korea Meteorological Administration) at 9 stations deployed along almost all offshore areas of Korea are used, in cases where the period of hourly data sample ranges from 4 to 13 years. The comparison between both samples is conducted using the wind statistics such as mean value and standard deviation of wind speed and the error indices such as correlation coefficient, slope value in correlation diagram and root-mean square error. Main conclusions are that 1) MSM winds are in overall agreement with measurement winds at 9 stations, 2) in details, MSM wind speeds tend to be slightly smaller than measured speeds at the East and South stations and slightly greater at the West stations and 3) the error indices also suggest somewhat lower accuracy at the West stations than at the East and South stations.