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- 2013.09.09
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서울대학교 지구환경과학과 전종갑 교수가 오는 9월 13일 APEC 기후센터(APCC)를 방문한다. 전종갑 교수는 “Overview of the Variability of the East Asian Summer Monsoon: Intraseasonal to Centennial Variation”라는 제목으로 오후 3시 APCC 2층에 위치한 국제회의실에서 세미나를 주재한다.
세미나 일정 등 상세 정보는 아래와 같다.
1. 발표자: 전종갑 교수 (서울대학교 지구환경과학과)
2. 발표 제목: Overview of the Variability of the East Asian Summer Monsoon: Intraseasonal to Centennial Variation
3. 일시: 2013년 9월 13일 금요일 오후 15시
4. 장소: APEC 기후센터 국제회의실 (2층)
5. Abstract
The East Asian monsoon is a part of the global monsoon system, which has great impacts on society and the economy in the East Asian region. Particularly, the East Asian summer monsoon is characterized by a combination of influences from the tropics and the midlatitudes, in contrast with other parts of the global monsoon system. Our study indicates that rainfall associated with stationary fronts, such as Meiyu, Changma, and Baiu, over East Asia is connected to the tropical activity and the remaining rainfall in summer is related to the midlatitudinal convective activity. The former is well correlated with ENSO, while the latter is associated with the EU pattern.
Korea has the longest historical rainfall record in the world. Its rainfall was measured by Chukwookee, which is a rain gauge from ancient times. The rainfall data from Chukwookee is available from 1771 and has been analyzed in order to study the long-term variability of the summer monsoon. Although Chukwookee rainfall data was obtained from only one observation station (Seoul), it is still very useful to understand the trends and long-term variations of the East Asian summer monsoon. Furthermore, summer rainfall data from Seoul from modern rain gauges, which are fortunately connected to the Chukwookee data without any gaps, have been analyzed and some features of rainfall variability have been compared between the ancient and modern times. It was found that there were two dry epochs and two wet epochs during the total period from ancient to modern times and rainfall-peak dates have been much delayed from Julian pentad 37 to Julian pentad 44.
The negative correlation between the East Asian summer monsoon (EASM) and the western North Pacific summer monsoon (WNPSM) was observed to make a decadal change in the mid-1990s. After the mid-1990s, this negative correlation was significantly strengthened. The regressed geopotential height fields against the WNPSM index also
support this strengthened relationship after the mid-1990s, indicating a clear East Asia/Pacific teleconnection pattern.
Furthermore, a significant increase in rainfall in August over the Korean peninsula was observed after the mid-1990s.
The East Asian summer monsoon is expected to intensify under global warming. The rain band may become more activated and the duration of summer rain extended. Moreover, rainfall due to cumulus convection is anticipated to increase more significantly than that due to large-scale condensation.
6. Brief CV
- Education
1981 – 1987: Ph.D. Atmospheric Sciences, University of Wisconsin-Madison, USA
1973 – 1975: M.Sc. Atmospheric Sciences, Seoul National University, South Korea
- Professional Experience
1998 – Present: Professor in Atmospheric Sciences, Seoul National University, South Korea
1993 - 1998: Associate Professor in Atmospheric Sciences, Seoul National University, South Korea
1989 – 1993: Assistant Professor in Atmospheric Sciences, Seoul National University, South Korea
1987 – 1988: Researcher in Atmospheric Sciences, University of Wisconsin-Madison, USA