Empirical Relationship Between Maximum Sustained Wind And Central Pressure For Typhoons In Northeast Asia

Abstract

An empirical relationship between minimum central pressures and maximum wind speeds for Northeast Asian tropical cyclones was obtained by analyzing typhoon parameters and sea-surface winds observed at the East China Sea, the South Sea and the East (Japan) Sea of Korea for 20 years (1979 - 1999). The resulting empirical equation was compared with other relationships obtained from previous studies. The result shows a very close agreement with SPM's(1984) relation although it was lower in wind intensity compared with Atkinson et al’s relation as the minimum central pressures are decreased. The main cause of the differences may lie in the quality of sea-surface wind data obtained by either direct measurement or indirect estimation from coastal wind observations.