충청지방 호우의 종관적 특성

Abstract

In order to clarify the characteristics of heavy rainfall over Chung -chong province topographical influence, synoptic system track, and the distribution of precipitation depending on wind flow were analysed using synoptic data. The data used in this study are precipitation for ten years from 1995 to 2004, movement of low pressure, and pressure pattern statics. Heavy rainfall patterns were classified into several group according to pressure distribution, temporal and spatial pattern for ten years data. And the pattern of heavy rainfall were also compared with topographical pattern, synoptic chart, static tables, and remote sensing data. The results are as follows; The amount of precipitation increase over middle and south par of Chungchongnamdo and middle and north part of chungchongbukdo because of high mountains like Noryeong and Sobaek mountains. Rainfall characteristic of heavy rainfall at low pressure passing through were analyzed that heavy rainfall often occur due to south-westerly with huge moisture and low pressure system mainly move to east-north-east or north-east direction. The deviation of precipitation between Honam and Chungchong province is large and this deviation almost depends on direction of low pressure inflow. High frequency of heavy rainfall over Chungchong province occur at June to September and its maximum value is from August and September. The time of maximum value of precipitation in a day occur at midnight to 0900LST. The frequency of Pressure pattern with heavy rainfall is in order like low pressure, Typhoon, Changma front, and Northern Pacific High. But atmospheric instability of each pattern was also compared and instability with Northern Pacific High apparence show maximum And more detail analysis of several auxiliary data like remote sensing, satellite, and radar data is necessary for improvement of accuracy of heavy rainfall prediction.