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Primary Analysis of the Northern Hemisphere Circumpolar Vortex Indices at 500 hPa Geopotential Height Field

Tang Qiu-yan

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Abstract

运用NCEP/NCAR1958～2006年的500hPa月平均再分析高度场资料,结合500hPa北极极涡的特征等直线对北极极涡环流指数(面积、强度、中心位置)进行了计算.根据所得的计算结果比较分析了500hPa北极极涡环流指数的年际及季节变化,得到了一些北极极涡系统的变化规律:冬季500hPa北极极涡面积有明显的年际变化.从长期趋势来看,1958～2006年极涡面积呈现出显著减小的趋势；500hP...

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运用NCEP/NCAR1958～2006年的500hPa月平均再分析高度场资料,结合500hPa北极极涡的特征等直线对北极极涡环流指数(面积、强度、中心位置)进行了计算.根据所得的计算结果比较分析了500hPa北极极涡环流指数的年际及季节变化,得到了一些北极极涡系统的变化规律:冬季500hPa北极极涡面积有明显的年际变化.从长期趋势来看,1958～2006年极涡面积呈现出显著减小的趋势；500hP...

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Available abstract

运用NCEP/NCAR1958～2006年的500hPa月平均再分析高度场资料,结合500hPa北极极涡的特征等直线对北极极涡环流指数(面积、强度、中心位置)进行了计算.根据所得的计算结果比较分析了500hPa北极极涡环流指数的年际及季节变化,得到了一些北极极涡系统的变化规律:冬季500hPa北极极涡面积有明显的年际变化.从长期趋势来看,1958～2006年极涡面积呈现出显著减小的趋势；500hP...

Key concepts: Geopotential height, Circumpolar star, Geopotential, Northern Hemisphere, Climatology, Vortex, Field (mathematics), Polar vortex

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