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Research Article

An Examination on Characteristics of Extreme High Temperature Events by their Types of the Geographic Extent over the Republic of Korea

지리적 공간범위 유형에 따른 우리나라 극한고온현상의 특성 분석에 관한 연구

Yujin Kima
,
Youngeun Choib*
김 유진a
,
최 영은b*
aGraduate Student, Department of Geography, Konkuk University
bProfessor, Department of Geography, Konkuk University
a건국대학교 지리학과 박사과정
b건국대학교 지리학과 교수
* Corresponding Author
30 April 2020. pp. 83-95
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Abstract

In this study, the extreme high temperature days (EHD) in the Republic of Korea (ROK) were classified according to their spatial extent at a regional scale. The characteristics of EHD such as intensity, frequency and duration by each type and the mechanism of EHD were identified. A extreme high temperature day in the ROK (EHDk) was defined as a day when the daily maximum temperature of 33°C or higher occurred at three or more stations. Total 1,488 EHDks were selected and classified into four types (Broad-inland, Midwestern, Gyeongsang and the eastern coastal area, Southern types) using the cluster analysis. The Broad-inland type had not only the greatest spatial extent but also the greatest intensity, as extreme temperature events occurred throughout the whole regions of ROK except for Jeju Island and minor coastal areas. The second greatest area of EHDk, the Midwestern type, had a spatial extent including many metropolitan areas, the Yongsu area of Gangwon Province, Chungcheongnam-do, and Jeollabuk-do Province. The most frequent type Gyeongsang and the eastern coastal area one showed the spatial distribution opposite to the Midwestern type. Lastly, the Southern type occurred in the smaller area with the weakest intensity. The spatial extent of EHDk were mainly determined by the synoptic circulation patterns and the topographic effects.

Keywords
extreme high temperature day
spatial extent
intensity and frequency
duration
the Republic of Korea

본 연구에서는 공간범위를 고려하여 우리나라에서 발생한 극한고온일의 빈도, 강도, 지속기간 등의 특성과 그 발생 메커니즘을 밝히고자 했다. 3개 이상의 지점에서 일최고기온 33℃ 이상이 발생한 날을 극한고온일(EHDk)로 정의하고, 기상청 60개 기상관측지점 자료를 이용하여 1,488개의 극한고온일을 산출하였다. 군집분석을 이용하여 극한고온일의 공간범위를 4개(내륙형, 중서부형, 경상·동해형, 남부형) 유형으로 분류하였다. 내륙형은 발생면적이 가장 넓고, 강도가 가장 강한 유형으로 제주도와 일부 해안지역을 제외한 우리나라 전역에 극한고온현상이 발생한다. 두 번째로 넓은 면적으로 발생하는 중서부형은 수도권과 영서지역, 충청남·북도, 전라북도에 해당하는 공간범위를 가진다. 경상·동해형은 가장 빈번하게 발생하는 유형으로 중서부형과 반대의 공간범위를 가지며, 마지막으로 남부형은 가장 좁은 면적에 발생하고 강도 또한 가장 약하다. 각 유형에 따라 대기의 종관패턴이 차이가 나며, 주요 산맥의 지형효과와 결합하여 극한고온일의 공간범위에 영향을 미치는 것으로 나타났다.

키워드
극한고온일
공간범위
강도와 빈도
지속기간
우리나라
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Information
  • Publisher :The Korean Geographical Society
  • Publisher(Ko) :대한지리학회
  • Journal Title :Journal of the Korean Geographical Society
  • Journal Title(Ko) :대한지리학회지
  • Volume : 55
  • No :2
  • Pages :83-95
  • Received Date : 2020-04-07
  • Revised Date : 2020-04-25
  • Accepted Date : 2020-04-25
  • DOI :https://doi.org/10.22776/kgs.2020.55.2.83
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