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기후요소의 엔트로피와 그 순변화형에 의한 기후지역 구분
박현욱 국토지리학회 2007 국토지리학회지 Vol.41 No.1
The seasonal variation and frequency of precipitation phenomenon of the Korean Peninsula over a period of 10 days during summer show strong local weather phenomena because of its mathematical location and geographic factors. The data used for this study are daily precipitation over a period of 10 days of summer during the recent fifteen years (1991-2005) at 68 stations in Korea. It is divided into four class of no rain,1-10.0mm/day, 10.1-30.0mm/day, 30.1mm over/day. The purpose of this paper is to induce the entropy of climatic elements over a period 10 days during summer, clarify the variation patterns of their space scale, and study the classification of climatic region in Korea, according to the combinations of the entropy and variation pattern, using the entropy and amplitude coefficient (Rs) calculated on basis of the information theory and the principal component analysis. The characteristics of variation pattern over a period of 10 days during summer can be chiefly divided into four categories (Rs1, Rs2, Rs3, Rs4) and the accumulated contributory rate of this is 84.1%. The variation pattern of entropy during a period of 10 days in Korea classified into 9 types from A to j. And Climatic region established by the entropy of climatic elements during summer in Korea can be classified into 14 types. 본 연구는 한반도의 수리적 위치와 지리적 요인의 영향을 명확히 반영하여 우리나라의 날씨 및 기후특성을 잘 나타내는, 하계의 탁월일기 및 강수현상의 순별 다소 {강수 없음, 소우(0.1-10.0mm/일), 중우(10.1-30.0mm/일), 대우(30.1mm 이상/일)}와 그 변화에 대해, 정보이론과 주성분 분석법을 응용하여 기후요소의 엔트로피와 주성분 진폭계수(Rs)를 추출하고 적용하여 그 공간스케일의 시간적 변동을 살핀다. 이를 토대로 한국 내 68개 관측지점 별 하계 순(1991-2005)의 기후요소의 엔트로피의 기후대표성을 구명하고 기후지역 구분을 시도한 것이다. 그 결과, 기후요소의 엔트로피의 순변화의 전형적 특징은 상위 4개의 순변화형(Rs1, Rs2, Rs3, Rs4)으로 표현되며 그 누적 기여율은 84.1%이다. 또한 한국의 기후요소의 엔트로피의 순변화형은 A-j형 까지 9개가 추출되었고 기후지역은 14개 형으로 분류되었다.
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朴鉉旭 대한지리학회 1986 대한지리학회지 Vol.21 No.1
The purpose of this treatise was to induce the annual variation pattern of precipitation (that is one of the important elements of the precipitation characteristics), clarify the variation of its space scale, and study the subdivision of precipitation region in South Korea according to the combinations of annual precipitation amounts and annual variation pattern of monthly precipitation, using the mean values for the years 1954∼1984 at 70 stations of South Korea. The classified annual precipitation, and the principal component vector and the amplitude coefficent by the principal component analysis were used for this study. The results of this study can be summarized as follows: 1) The annual precitation of South Korea reaches the greatest in the southern parts below tat. 35.3°N, the high snowfall areas of east coastal region, and the eastern parts of the Kwangju mountains, and tile smallest in Yeongnam inland area of the southern part of the Soback mountains. The amplitudes of annual variaion becomes great where the precipitation is great. 2) The characteristics of annual precipitation variation can be divided into two pattern. One is that precipitation reaches its great amount in summer, small in winter, to which actually all of the areas of South Korea partains. The other is that precipitation reaches its great amount during July and August, and becomes greater when the winter comes, to which the heavy snow area of winter pertains. 3) 16 subdivisions (from Ⅰa_2 to Ⅲㅗ_3) were produced based on the above two characteristics and the volume of annual precipitation amounts, and resulted in 9 types of annual precipitation variation. 4) It can be divided the central east coastal area into Ⅱe_1, Ⅱe_2 sections and Cheiu island into Ⅱa_5, Ⅲa_2, Ⅲa_3, Ⅲc_1 Sections. This is one of the results of the principal component analysis of annual precipitation variation pattern, and suggest that annual precipitation and its characteristics of seasonal distribution can be the important index of climatic regional division.
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