강우량과 풍속에 따른 한반도 영향태풍의 분류 및 특성분석

Abstract

This study classfied the typhoons that influenced the Korean Peninsula (KP) between 1971 and 2012 in order to predict damage of approaching typhoons and analyzed their characteristics. Based on a statistical analysis of rain and wind intensity for each typhoon from entering stage into emergency area to its dissipation stage, typhoons were objectively classified as rain-dominant, wind-dominant, and rain-wind dominant typhoon. The analysis of rain and wind intensity for each month showed that the rain-wind dominant typhoons were frequently occurred in August and September, and while the rain-dominant typhoons were observed mainly in August but rarely in September. The number of wind-dominant typhoons in September was larger than that in August. To explore this case, we compared monthly mean field for August, September particularly for atmospheric variables such 500 hPa geopotential height, 200 hPa Divergence, Jet stream, 850 hPa Equivalent Potential Temperature and 700 hPa Vertical velocity. we found that in August when typhoons moved northward to the middle latitudes where a jet stream is located, a divergence region is created with heavy precipitation. In September, relating a dry condition and hence less precipitation were shown up tropical air masses move southward as cold air masses approach the Korean Peninsula.