한국지구과학회지 (Journal of the Korean earth science society)

  • 제28권1호
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  • Pages.35-44
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  • 2007
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  • 1225-6692(pISSN)
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  • 2287-4518(eISSN)
한국지구과학회 (The Korean Earth Science Society)
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엘니뇨-남방진동, 인도양 쌍극자 모드, 두 현상의 관련성, 그리고 한반도 기후에 대한 영향

El Niño-Southern Oscillation, Indian Ocean Dipole Mode, a Relationship between the Two Phenomena, and Their Impact on the Climate over the Korean Peninsula

  • 발행 : 2007.02.28
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초록

본 연구에서는 엘니뇨현상과 인도양 쌍극자 모드(Indian Ocean Dipole, IOD) 현상의 상호 관련성과, 우리나라 기온, 강수량에 대한 두 현상의 영향을 분석하였다. 1954년부터 2004년까지 51년간 NINO 3 지수, IOD지수, 그리고 전국 11개 지점 지역평균한 월별 평균기온과 강수량 자료를 사용하였다. 엘니뇨현상과 IOD현상은 봄과 가을에는 동시 상관관계가 존재한다. 인도양에서 해수면온도 분포는 엘니뇨 해에는 남북진동이, IOD 해에는 동서진동 형태가 뚜렷하였다. 엘니뇨 해 우리나라에서는, 여름철에 냉하다우, 겨울철에 온난다우 경향이 뚜렷한 반면에, IOD 해에는 유의한 상관성을 찾을 수 없었다. 대기대순환에서도 엘니뇨 해에는 우리나라를 포함한 중위도에 통계적으로 신뢰할 만한 편차패턴이 나타나지만, IOD 해에는 그렇지 않았다.

This paper investigated the relationship between El $Ni\widetilde{n}o-Southern$ Oscillation (ENSO) and Indian Ocean Dipole (IOD) mode events and the impacts of these two phenomena on the climate, temperature and precipitation, of the Korean Peninsula. Data gathered from 1954 to 2004 were used for analysis, which included NINO 3 index, IOD index, and monthly mean precipitation and temperature at eleven locations in Korea. Statistical results showed that the IOD and ENSO were significantly correlated in Spring and Fall. It was clearly shown that the distribution of the sea surface temperature in the Indian Ocean has seen the Southern and Northern Oscillation in El $Ni\widetilde{n}o$ year, and Eastern and Western in IOD year. On the other hand, in El $Ni\widetilde{n}o$ you, the mean temperature of the Korea Peninsula was lower than normal in Summer and higher in Winter and its precipitation was more than normal in both Summer and Winter. However, significant correlation was not found in IOD year. In addition, the global atmospheric circulations during the major IOD years are less influential, unlike those of El $Ni\widetilde{n}o$ events.

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