서울대학교 지구환경과학부의 손병주 교수가 오는 2월 14일 APEC 기후센터를 방문한다. 손병주 교수는 "Decadal variation of El Niño over the last three decades causing strengthened Walker circulation"라는 제목으로 APCC 2층 로터스 국제회의장에서 오전 11시에 세미나 발표를 진행한다.

손병주 교수 세미나 주요 내용은 다음과 같다.

1. 발표자: 손병주 교수 (서울대학교 지구환경과학부)
 

2. 제목: Decadal variation of El Niño over the last three decades causing strengthened Walker circulation

3. 일시: 2013년 2월 14일 오전 11시

4. 장소: APEC 기후센터 3층 로터스 국제회의장

5. 초록

In order to examine the changes in the Walker circulation over recent decades, we analyzed sea surface temperature (SST), deep convective activities, upper tropospheric moistening, sea level pressure (SLP), and effective wind in the boundary layer over the 30-year period from 1979 - 2008. The analysis showed that the eastern tropical Pacific has undergone cooling while the western Pacific has undergone warming over the past three decades, causing an increase in the east-west SST gradient. It is indicated that the tropical atmosphere has responded to these SST changes; through increased deep convective activities and associated upper tropospheric moistening over the western Pacific ascending region, increased SLP over the eastern Pacific descending region in contrast to decreased SLP over the western Pacific ascending region, and enhanced easterly wind in the boundary layer, in response to the SLP change. These variations, recognized from different data sets, occur in tandem with each other, strongly supporting the intensified Walker circulation over the tropical Pacific Ocean. Since the SST trend was attributed to more frequent occurrences of the central Pacific-type El Niño in recent decades, it is suggested that the decadal variation of El Niño caused the intensified Walker circulation over the past 30 years. An analysis of current climate models shows that model results deviate greatly from the observed intensified Walker circulation. The uncertainties in the current climate models may be due to the natural variability dominating the forced signal over the tropical Pacific during the last three decades of the 20th century climate scenario runs by CMIP3 CGCMs.

6. 교수 약력
 

1) Education

1990: Ph.D. (Meteorology), Florida State University, USA

Thesis: Cloud and surface control on the Earth's net radiation balance and the role of atmospheric/oceanic energy transports: A satellite perspective (Advisor: Prof. Eric A. Smith)

1985: M.S. (Meteorology), Seoul National University

1980: B.S. (Earth Sciences), Seoul National University
 

2) Professional Experience

2012. 9. - 2016. 12: Vice President of the International Radiation Commission (IRC), IAMAS

2009. 1. - 2012. 12: Secretary of the International Radiation Commission (IRC), IAMAS

2010. 12. - 2012. 11: Director of the Atmospheric Environment Research Institute, SNU, Korea

2010. 1. - 2011. 12: Vice President of the Korean Meteorological Society

2008. 3. - 2009. 2: Visiting Professor, CCSR, University of Tokyo, Japan

2006. 10. - 2008. 9: Vice Director, University Computing Center, Seoul National University, Seoul, Korea

2003. 10. - Present: Professor, School of Earth and Environmental Sciences, Seoul University, Korea

1997. 10. - 2003. 9: Associate Professor, School of Earth and Environmental Sciences, Seoul University, Korea

1993. 8. - 1997. 9: Assistant Professor, Department of Earth Sciences, Seoul University, Korea

1993. 3. - 1994. 8: Associate Research Scientist, USRA/NASA Marshall Space Flight Center

1991. 4. - 1993. 2: Research Associate, USRA/NASA Marshall Space Flight Center

1990. 5. - 1991. 3: Research Associate, Department of Meteorology, Florida State University

1986. 8. – 1990. 4: Research Assistant, Department of Meteorology, Florida State University

* 세미나 관련 문의: APEC 기후센터 대외협력실 주수양 (051-745-3925)