호남지방의 태풍 전면 수렴대에 의한 호우 특성

Abstract

The 15th typhoon "MEGI" brought loss of 25.08 billion￦ and 6 lives throughout the country. Especially, 13 billion￦ and 3 lives were lost in Honam Province. This typhoon did a great deal of damage to the crops and people with heavy rainfall at the front region of typhoon without direct effect. In this study, 3 cases about heavy rainfall at the front region of typhoon in Honam province were analyzed. These 3 cases occurred for recent 5 years(2000~2004). Case 1 is typhoon "MEGI" passaged southwest by west Honam province in 18th~19th August, 2004. Case 2 is typhoon "MINDULLE" became weakened to the tropical storm near the sea 200 ㎞ far from Seogwipo in 3rd ~ 5th June, 2004. Case 3 is typhoon "BILIS" passaged through China and west side Honam province in 24th~27th August, 2000. In these 3 cases common factors were searched, 1) upstair jet stream which passaged from Sandung peninsula to Yodong peninsula helped the low stair conversion and an upwardly current was strengthened by second circulation, heavy rainfall occurred. 2) During heavy rain is falling in the conversions zone, typhoon was located from 27N to 31N. 3) In the 700 hPa T-T_(d) chart, strong dry zone was located near the Balhae bay and Sandung peninsula, such reason lead the heavy rainfall in the conversion zone was made by hot and moist air and dry air. 4) In the 500 hPa chart strong vorticity was located, this vorticity lead the growth low stair conversion. This means not only low stair conversion but also upstair conditions are important to form the heavy rainfall. 5) More than 50㎜ rain fell in these 3 cases. As the typhoon passaged from 27N to 31N, although the distance from typhoon to the Honam province is far, the upstair condition is enough to develop the low stair conversion, be careful the heavy rainfall possibility. In conclusion, more data and more research is needed to find factors that lead the heavy rainfall in Honam province.