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학술저널
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한국기상학회 Asia-Pacific Journal of Atmospheric Sciences 한국기상학회지 제41권 제6호
발행연도
2005.12
수록면
943 - 954 (12page)

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In this study, predictability of winter seasonal temperature over Ease Asia region including Korea Peninsula (110°~145°E, 20~50°N) hindcasted for the period of 1971 ~ 2000 by CME/PNU CGCM is investigated. The predictability of the model has been evaluated based on EOF analysis in terms of Artic Oscillation, East Asia winter monsoon and Nino 3.4 SST anomaly. CME/PNU CGCM used in this research is a fully coupled and physically based ocean-atmosphere-sea ice-land model, in which neither any flux adjustment nor anomaly coupling methods are adapted. Each of the hindcast experiment consists of 0~12-month lead integration started from September first of each year for the period 1971-2000 (30 years). Of the 0~12 -month leads, 3 to 5-month lead prediction are used for the study of winter temperature predictability. The synoptic features of mean DJF temperature and its interannual variance obtained from CME/PNU CGCM over East Asia are generally similar to the observations. The prediction and observation are significantly correlated with confidence level of 95% over Korea Peninsula, Japan and East Sea region, in particular, illustrating high predictability of winter temperature with CME/PNU CGCM over the area. In order to find out the prominent variations that would contribute to the high predictability, EOF analysis has been performed. The analysis shows that the most dominant mode which contribute to the variations of winter temperature of model and observation over East Asia are identical and that the mode is highly related with East Asia Winter Monsoon. It implies that the high correlation between model prediction and observation is due to the model capability of depicting the first dominant mode associated with the East Asia Monsoon variation. At least, however, it turns out that Arctic Oscillation and ENSO seem not to be the factors that influence the winter temperature over the region significantly. Coincidently the model does not depict the AO- or ENSO-related modes which might be due to the reason that they are either within the range of model uncertainties or insignificant relationship with the temperature variations over the area. As a conclusion, this research shows that CME/PNU CGCM illustrates its ability to predict the leading mode of East Asia Winter temperature related to East Asia Winter Monsoon variation with leading months of 3~5.

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Abstract
1. 서론
2. 모형의 개요 및 검증 자료
3. 실험 방법
4. 분석 결과
5. 요약 및 결론
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