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종관적 특징에 따른 남한 강수 특성 분석:30년 (1973-2002) 기후 통계
나득균,곽종흠,서명석,홍윤 한국지구과학회 2005 韓國地球科學會誌 Vol.26 No.7
The characteristics of precipitation over South Korea from 1973 to 2002 were investigated. The synopticannual mean frequency of the total precipitation, its duration time and amount for 30 years are 179 times, 2.9 hours, and7.1 m, respectively. About 59% of the total precipitation events were associated with a synoptic low. The dominantpatterns are identified with respect to seasons: A synoptic mobile low pressure pattern is frequent in spring, fall, andwinter, whereas low pressure embedded within the Changma and orography induced precipitation are dominant in sumerand in winter. For the amount of precipitation, precipitation originated from tropical air associated with typhoon, tropicalconvergence, and Changma is more significant than that with other pressure patterns. The statistical elapse time reachingto 80 m, which is the threshold amount of heavy rainfall watch at KMA, takes 12.9 hours after the onset ofprecipitation. The probability distribution function of the precipitation shows that the maximum probability for heavyof the Korean peninsula plays an important role in occurrence of heavy rainfall. For example, heavy precipitation isfrequently occurred at Youngdong area, when typhoon passes along the coastal region of the back borne mountains in thepeninsula. The climatological classification of synoptic patterns associated with heavy rainfall over South Korea can beused to provide a guidance to operational forecast of heavy rainfall in KMA 본연구에서는 2003년기상청에서분류한강수유발기압유형을근거로 1973년부터 2002년까지 30년간전국 61 소의시간별강수자료를사용하여우리나라강수의특성을살펴보았다. 시간강수자료를이용하여강수의시작과종료를정의하여지속시간과집중호우까지의도달시간을조사하였고집중호우발생확률을분석하였다. 지난 30년동안한반도의강수현상을조사한결과연평균약 179회의강수가발생하였으며, 강수지속시간과강수량은각 2.9시간과 7.1 mm 로나타났다. 저기압형에의한강수가전체의약 59%를차지했고, 여름에는장마형, 가을에는전선형과태풍형, 겨울에는지세형의강수가나타나는계절적특징을보여주었다. 태풍과장마등열대기류와관련된강수유형들은 10 mm 이상의강수량을보인반면에, 국지적인규모로나타나는유형들은 5mm 미만의약한강수량을보였다. 전체강수현상중집중호우로이어진경우는 1.24%로호우기준까지약 12.9 시간이소요되었다. 집중호우를자주유발하는유형은장마형과저기압형으로나타났으나, 발생확률은태풍직접형, 태풍변질형, 열대류수렴형이높았다. 지역별로는남해안지역은태풍직접형과태풍변질형, 영동지역은태풍직접형, 경기및강원북부는태풍변질형, 열대류수렴형과장마형이, 종관적 특징에따른남한 강수특성분석년 기후 통계733 : 30 (1973~2002) 그리고충청지역은태풍변질형과열대류수렴형에의한집중호우의가능성이큰것으로분석되었다기상청에서분류하였던강수의유형은다소주관적인면을가지고있으나한반도강수의특성을파악하는데별무리가없었다특히새롭게분류를시도한열대류수렴형은여름철에많은강수를유발하는기압계로주목할필요가있다고본다