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자료유형
학술저널
저자정보
저널정보
한국기상학회 Asia-Pacific Journal of Atmospheric Sciences Journal of the Korean Meteorological Society Vol.42 No.6
발행연도
2006.12
수록면
379 - 388 (10page)

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초록· 키워드

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The sensitivity of rainfall amount and maximum rainfall point to the integration time-step sizes was examined in the simulations of two heavy rainfall cases during summer using Weather Research and Forecasting (WRF) model. Optimal ranges of the integration time-step sizes between accuracy and efficiency was also suggested for simulations of heavy precipitation. The sensitivity of area-mean spatial patterns and temporal variations in rainfall were relatively small for the time-step sizes. But the maximum rainfall amount and points were sensitive to the time-step sizes, The difference of the maximum rainfall was attributed to the grid-scale-resolvable rain and thus the difference tended to be large in the simulation of heavy rainfall with more non-convective rain than convective rain. Explicit moisture was more sensitive to the time-step sizes than the cumulus parameterization scheme. This is because the former uses a time-dependent formulism. The time-step sizes of 90-150 s corresponding to a horizontal resolution of 30 ㎞ can be used to simulate heavy rainfall over Korea and a large time-step size can be used for operational purposes if the time-step size is within the linear stability condition.

목차

Abstract
1. Introduction
2. Experiments
3. Results
4. Discussion and Conclusion
Acknowledgements
REFERENCES

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