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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.2
발행연도
2007.5
수록면
77 - 89 (13page)

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In December 2005, there was a climate extreme over the southwestern part of the Korean peninsula (Ho-Nam province), accompanied by unusual long-lasting snow days. The objective of this paper is to examine the capability of the WRF (Weather Research and Forecasting) model in simulating such a winter climate extreme over Korea, and subsequently to identify the role of above-normal SST (sea surface temperature) over the Yellow Sea during this period. The sensitivity of the results to the vertical resolution and the comparison of results from the MM5 (the fifth-generation Mesoscale Model) are also discussed. The WRF model captures the spatial distribution of monthly accumulated snowfall over the Ho-Nam province, but its amount is exaggerated by a factor of about 10. It is found that abnormal warm SST over the Yellow Sea in December 2005 contributes 46% of the variance represented by the extreme snowfall over the Ho-Nam province. Such a high bias is alleviated as the vertical resolution in the lower troposphere is increased. The loss of mass in the model is observed during the simulation period, particularly, during heavy snowy days. The MM5 shows behavior similar to the WRF, but with better performance. This study further indicates that fundamental studies on the model’s vertical resolution and surface processes in the model are needed to improve snow forecasting over Korea.

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Abstract
1. Introduction
2. Synoptic Features of December 2005
3. Numerical Experimental Setup
4. Results
5. Conclusion
Acknowledgements
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