지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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
- 285 - 298 (14page)
이용수
초록· 키워드
오류제보하기
Satellite-derived rain rates could have a positive effect on numerical model simulations in which precipitation processes play an important role. This study investigates data assimilation impacts of SSM/I derived rain rates in a nonhydrostatic mesoscale model (MM5) for a convective system over the ocean and a typhoon approaching the Korean Peninsula through the latent heat nudging method. To implement the method, the temperature tendency calculated by the model is scaled in accordance with the ratio between model simulated and satellite derived rain rates. The assimilation experiment shows positive impacts on the rainfall forecasts of a mesoscale convective system over the southern sea of Korea. Due to the assimilation, it is found that the mixing ratio at lower levels is increased, and vertical velocity is intensified. It is interpreted that the amount of rainfall increases mainly over the area of the convective rain as a result of the assimilation. Although the effect of the rain rates assimilation decreases with time, this approach produces better rainfall forecast up to 10 h. A typhoon case is also applied to investigate the effect of the rain rates assimilation on track and intensity forecasts. In this case, the rain rates assimilation shows a better impact on typhoon intensity than the track. During the assimilation, the simulated central pressure decreases and approaches the observed pressure. The minimum pressure arising from the assimilation of three path observations decreases more rapidly than one path. The effect of assimilation for the typhoon case lasts up to about 60 h, which is longer than that of mesoscale convective system case.
목차
Abstract
1. Introduction
2. Methodology and Data
3. Numerical Experiments
4. Results
5. Summary and Conclusion
Acknowledgements
REFERENCES
참고문헌 (16)
참고문헌 신청
1. [학술지(정기간행물)] - / 1999 / The effect of asimilat-ing rain rates derived from satellites and lightning on forecasts of the 193 Superstorm 127 : 1433 ~ 1457
2. [학술지(정기간행물)] - / 2001 / The efect of spaceborne microwave and ground-based continuous lightning measurements on forecasts of the 1998 Groundhog Day Storm 129 : 1809 ~ 1833
3. [학술지(정기간행물)] - / 1994 / Impact of assimilating SSM/I rainfal rates on numerical prediction of winter cyclones : 151 ~ 164
4. [학술지(정기간행물)] - / 2004 / A nudging scheme for the assimilation of precipitation data into a mesoscale model 19 : 855 ~ 871
5. [학술지(정기간행물)] - / 2000 / A new method of observed rainfall assimilation in forecast models 39 : 1282 ~ 1298
2. [학술지(정기간행물)] - / 2001 / The efect of spaceborne microwave and ground-based continuous lightning measurements on forecasts of the 1998 Groundhog Day Storm 129 : 1809 ~ 1833
3. [학술지(정기간행물)] - / 1994 / Impact of assimilating SSM/I rainfal rates on numerical prediction of winter cyclones : 151 ~ 164
4. [학술지(정기간행물)] - / 2004 / A nudging scheme for the assimilation of precipitation data into a mesoscale model 19 : 855 ~ 871
5. [학술지(정기간행물)] - / 2000 / A new method of observed rainfall assimilation in forecast models 39 : 1282 ~ 1298
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