In this study, we analyzed the characteristics of climate variability in summer rainfall during Changma over three sub-sector regions (Middle, Southern, Jeju) in South Korea for the new climatological period of 1991- 2020 using observation data from 60 ASOS stations. There was a significant interannual variability in rainfall, wet days, and rainfall intensity but the long-term trend of rainfall was not significant over the three sectors in South Korea. Comparing the new climatology (P2: 1991-2020) with the old one (P1: 1981-2010), it was found that the precipitation during Changma in new climatology (P2) was enhanced in Middle sector but reduced in Southern and Jeju sectors. In P2, wet days increased only a few stations in the Middle sector but the rainfall intensity was strengthened over the 50% stations including Middle sector, south and west coast of the Southern sector. Wet days above 25, 50, 75, 95%ile rainfall during Changma in Southern and Jeju sectors all decreased in P2. Climatological change from P1 to P2 showed a large variability not only in temporal frame but also in the spatial distribution in South Korea.

Abstract
1. 서론
2. 자료 및 연구방법
    1) 연구자료
    2) 연구방법
3. 장마 기간의 강수의 시계열 변동특성
4. 신 기후값(1991~2020년)에 나타난장마 기간 강수의 특성
5. 요약 및 결론
References

• 문자연((주)포디솔루션 기업부설연구소) | Ja-Yeon Moon (Principal Research Scientist, Research Institute, 4D Solution, Co., Ltd.)
• 김기영((주)포디솔루션) | Ki-Young Kim (CEO, 4D Solution, Co., Ltd.)
• 최영은(건국대학교 지리학과) | Youngeun Choi (Department of Geography, Konkuk University) Correspondence
• 민숙주(건국대학교 기후연구소) | Sookjoo Min (Research Scientist, Climate Research Institute, Konkuk University)