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동아시아의 겨울철 일평균 기온 변화에 나타난 계절 내 변동의 군집분석에 의한 지역 분류

Regional Classification of Intra-seasonal Fluctuations Appeared in Wintertime Daily Mean Temperature Change in East Asia by Cluster Analysis

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기후연구소 (KU Climate Research Institute)|2017.03|기후연구 (Journal of Climate Research)|제12권 제1호|pp. 1-16|DOI http://dx.doi.org/10.14383/cri.2017.12.1.1

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참고문헌

키워드

군집분석cluster analysis동아시아East Asia계절 내 변동계절 내 변동 유형intra-seasonal fluctuationpatterns of intra-seasonal fluctuationwintertime temperature change겨울철 기온변화

초록

In this study, the intra-seasonal fluctuation (ISF) of wintertime temperature change in East Asia was classified by a cluster analysis of complete linkage. A ISF of temperature change was defined as a difference of synthesized harmonics (1 to 36 harmonic) of daily temperature averaged for 30 years (1951~1980, 1981~2010). Eight clusters were gained from the ISF curves of 96 stations in East Asia. Regions of the cluster C, G and A1 seem to be affected by the Siberian High (SH) center, whereas the cluster A1, A2, D, B and F by the SH main pathways. Regions of the cluster E are apart from the SH main pathways and appear to be in the area of influence of other factors. Wintertime temperatures in Northwest China (clusters C, G) and Northeast China (cluster A1) were increased very largely. In most clusters, around late January there were less warming periods than the winter mean of the mean ISF of the clusters, before and after this time there were more warming periods than the winter mean.

Abstract

In this study, the intra-seasonal fluctuation (ISF) of wintertime temperature change in East Asia was classified by a cluster analysis of complete linkage. A ISF of temperature change was defined as a difference of synthesized harmonics (1 to 36 harmonic) of daily temperature averaged for 30 years (1951~1980, 1981~2010). Eight clusters were gained from the ISF curves of 96 stations in East Asia. Regions of the cluster C, G and A1 seem to be affected by the Siberian High (SH) center, whereas the cluster A1, A2, D, B and F by the SH main pathways. Regions of the cluster E are apart from the SH main pathways and appear to be in the area of influence of other factors. Wintertime temperatures in Northwest China (clusters C, G) and Northeast China (cluster A1) were increased very largely. In most clusters, around late January there were less warming periods than the winter mean of the mean ISF of the clusters, before and after this time there were more warming periods than the winter mean.

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