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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국기상학회 Asia-Pacific Journal of Atmospheric Sciences Journal of the Korean Meteorological Society Vol.43 No.3
- 발행연도
- 2007.8
- 수록면
- 253 - 265 (13page)
이용수
초록· 키워드
오류제보하기
The interannual variability of sea surface temperature (SST) in the tropics induces changes in global-scale atmospheric circulation not only in seasonal-to-interannual time scale but also in sub-seasonal time scale such as Madden-Julian Oscillation (MJO). The present study investigates the response of Northern Hemisphere (NH) atmospheric circulation to the tropical forcing in order to explain the mechanism of the features found from the interannual variability of tropical convection and extratropical circulation in intraseasonal time scale which showed distinctive differences between warm and cold episodes of El Nino and Southern Oscillation (ENSO). The tropical convection associated with MJO are found to have latitudinal and longitudinal movement as the western Pacific warm pool evolves by the interannual variability of SST. As a mid-latitude response, the extratropical circulation experiences large contrast in the magnitude of variability between the cold and warm episodes of ENSO. To explain the cause of the magnitude difference in the NH atmospheric circulation between opposite phases of ENSO, several tropical SST forcing experiments are performed. The sensitivity experiments forced by dipole SST anomalies with maximum centered at the equator and 10 degree north with the longitudinal locations varying from the Indian Ocean to the central and eastern Pacific are integrated with 8 ensemble members. The simulated mid- to high-latitude geopotential height is shown to be in good accordance with the observation especially over the Asia-Pacific-North America sector and the magnitude of the extratropical variability is enhanced when the tropical forcing was located to the north. From the experiments, it is confirmed that the atmospheric variability in the extratropics is largely contributed by the latitudinal migration of the tropical forcing as well as the changes in longitudinal location.
목차
Abstract
1. Introduction
2. The Model and Experiments
3. Interannual variability of MJO and MJO-associated extratropical variability
4. Response of mid-latitude atmospheric circulation to the eastward evolution of tropical dipole heating
5. Contrasts in the mid-latitude atmospheric variability to the northward migration of MJO-like forcing
6. Summary and Conclusion
Acknowledgement
REFERENCES
참고문헌 (27)
참고문헌 신청
1. [학술지(정기간행물)] - / 1983 / Horizontal Energy propagation in a Barotropic Atmosphere with Meridional and Zonal Structure : 1689 ~ 1708
2. [학술지(정기간행물)] - / 2003 / Remote response to tropical heating via the subtropical jet waveguide
3. [학술지(정기간행물)] - / 2006 / The formulation and atmospheric simulation of the Comunity Atmosphere Model version 3 (CAM3) 19 : 2144 ~ 2161
4. [학술지(정기간행물)] - / 1979 / Lanczos filter in one and two dimensions : 1016 ~ 1022
5. [학술지(정기간행물)] - / 1990 / Tropical-extratropical interaction associated with the 30-60 day oscillation and its impact on medium and ex-tended range prediction : 2177 ~ 2199
2. [학술지(정기간행물)] - / 2003 / Remote response to tropical heating via the subtropical jet waveguide
3. [학술지(정기간행물)] - / 2006 / The formulation and atmospheric simulation of the Comunity Atmosphere Model version 3 (CAM3) 19 : 2144 ~ 2161
4. [학술지(정기간행물)] - / 1979 / Lanczos filter in one and two dimensions : 1016 ~ 1022
5. [학술지(정기간행물)] - / 1990 / Tropical-extratropical interaction associated with the 30-60 day oscillation and its impact on medium and ex-tended range prediction : 2177 ~ 2199
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UCI(KEPA) : I410-ECN-0101-2009-453-016241041