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논문 기본 정보

자료유형
학술저널
저자정보
김민수 (국립공주대학교) 서명석 (국립공주대학교)
저널정보
한국기상학회 대기 대기 Vol.34 No.4
발행연도
2024.11
수록면
429 - 444 (16page)

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초록· 키워드

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The frequency and intensity of extreme weather events are increasing due to climate change, causing significant social and economic damage. Consequently, understanding the climatological atmospheric environment and trends in Korea is becoming important. This study analyzes diurnal and intra-seasonal variations of instability indices and environmental parameters (Inst_Inds) using rainy season (May to September) upper-air data from seven stations in Korea. We also analyzed trends in the mean of the Inst_Inds and the counts over the moderately unstable threshold (MUT). CAPE, LI, and TPW exhibit diurnal variation more unstable at 1200 UTC, while KI, SWEAT, and SSI show the most stable at 0600 UTC. Most Inst_Inds show stronger instability in July and August compared to May, June and September, indicating significant intra-seasonal variations. SWEAT and TPW generally show destabilizing trends regardless of station and month, whereas other indices do not exhibit consistent trends. CAPE and LI show destabilizing trends at Baengnyeongdo and Bukgangneung, but stabilizing trends at Osan, Gwangju, and National Typhoon Center. These trends are particularly strong in July and August, and at Baengnyeongdo and Bukgangneung stations, indicating increased instability in northern Korea. The tendency of MUT excess frequency varies from station to station in most instability indices, but TPW shows an increasing trend regardless of the station. The inconsistent trend of counts over MUT in Inst_Inds with the recent increase in frequency and intensity of heavy rain in Korea suggests the need to adjust thresholds that currently do not reflect changes in extreme precipitation characteristics.

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Abstract
1. 서론
2. 자료 및 연구방법
3. 결과
4. 요약 및 결론
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