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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Study of Year-to-Year Variations in Seasonal Progression over Japan Using Frontal Zone Indices
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Study of Year-to-Year Variations in Seasonal Progression over Japan Using Frontal Zone Indices

机译：利用额叶区域指数研究日本季节性进展的逐年变化

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References(14) The purpose of this work is to create indices to represent the atmospheric conditions throughout Japan based on frontal zone data at 5-day intervals for the period 1948-2013. The index was created by conducting principal component analyses of the distribution of frontal frequencies near frontal zones. The distribution of the factor loadings were interpreted as variations of the frontal zone in the following manner: PC1, northward/southward shift of the frontal zone; PC2, increase/decrease of frontal frequencies near the frontal zone; PC3, the extending direction of the frontal zone, whether northwest-southeast or southwest-northeast; and PC4, west-east variations of the frontal frequencies near the frontal zone. The result of correlation analyses between the indices defined as the factor scores and those representing global climatic and oceanic phenomena or teleconnection patterns revealed, in detail, periods with strong connections and comprehensive relationships reported by previous works. Furthermore, trends were found in the recent climate, such as southward shift of the frontal zones in mid- and late spring and increased frontal frequencies around frontal zones in mid- and late summer.
机译：参考文献（14）这项工作的目的是基于1948-2013年期间每隔5天的额叶地带数据创建代表整个日本大气状况的指数。该指数是通过对额叶区域附近的额叶频率分布进行主成分分析而创建的。因子负荷的分布以以下方式解释为额叶区域的变化：PC1，额叶区域向北/向南移动; PC2，增加/减少额叶区域附近的额叶频率; PC3，额叶区域的延伸方向，无论是西南偏东南还是西南偏东北;和PC4，额叶区域附近的额叶频率的东西向变化。在定义为因子得分的指数与代表全球气候和海洋现象或遥相关型的那些指数之间的相关分析结果，详细揭示了先前研究报道的具有强烈联系和全面关系的时期。此外，在最近的气候中发现了趋势，例如春季中后期和春季末期额叶区域向南移动，以及夏季中旬和末期额叶区域周围的额叶频率增加。

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