공주대학교 김맹기 교수가 "Examination of the global Lorenz energy cycle and preliminary applications for regime shift"라는 제목으로 오는 7월 27일 금요일 16시에 APEC 기후센터 중회의실에서 세미나를 발표합니다. 관심있는 분들의 많은 참석 부탁드립니다.

1. 발표자: 김맹기 교수, 공주대학교 대기과학과

2. 발표제목: Examination of the global Lorenz energy cycle and preliminary applications for regime shift

3. 일시: 2012년 7월 27일 목요일 16시

4. 장소: APEC 기후센터 2층 중회의실

5. 초록
 

In this talk, we will present the global Lorenz atmospheric energy cycle evaluated using the Modern Era Retrospective analysis for Research and Applications (MERRA) and the National Center for Environmental Prediction and the Department of Energy (NCEP R2) reanalysis datasets over a 30-year period (1979–2008) for the annual, JJA, and DJF means. The energy cycle calculated from the two reanalysis datasets is largely consistent, but the energy cycle determined using the MERRA dataset is more active than that determined from the NCEP R2 dataset. For instance, with regard to the annual mean, the general discrepancy between the energy components in the global integral is about 5 %, whereas the discrepancy between the conversion components is about 16 %, with the exception of C(PM, KM), which has a different sign in the global integrals. The latitude-altitude cross-section indicates that the difference in the energy cycle of the two reanalysis datasets is larger in the southern hemisphere than in the northern hemisphere. The conversion rates of mean available potential energy to mean kinetic energy [C(PM, KM)] and eddy available potential energy to eddy kinetic energy [C(PE, KE)] are also calculated using two formulations (so called ‘v∙grad z’ and ‘ω∙α’) for the two reanalysis datasets. The differences in the conversion rate between the two reanalysis datasets for the global integral are not appreciable for the two formulations.

In addition, we will present an approach to address the possible cause of winter temperature regime shift in the northern hemisphere in the late 1980s from a different point of view, namely energy cycle including atmospheric circulation and large-scale climate indices.

5. Brief CV

학력

1988. 공주대학교 지구과학교육과 학사
1990. 서울대학교 대기과학과 석사
1997. 서울대학교 대기과학과 이학 박사

경력

1997. 공주대학교 대기과학과 전임강사
2000. 공주대학교 대기과학과 조교수
2003. NASA/GSFC Laboratory for Atmospheres (Visiting Fellow)
2004. 공주대학교 대기과학과 부교수
2009. 공주대학교 대기과학과 교수

* 문의 : 대외협력실 주수양 (T. 051-745-3925)