北半球1月和7月纬偏场遥相关结构分析

TELECONNETIONS OF THE ZONAL ANOMALY FIELD OF 500 hPa HEIGHT OVER THE NORTHERN HEMISPHERE IN JANUARY AND JULY

本文利用1951—1986共36年资料对北半球500hPa1月和7月纬偏场的遥相关结构进行了分析结果表明:冬季纬偏场的遥相关结构与位势高度场的遥相关结构一致,都存在5种呈经向分布的遥相关型。但在夏季,位势高度场中的遥相关现象不明显,纬偏场中却存在4种呈纬向分布的遥相关型。对比纬偏场1月和7月的遥相关结构,发现两者存在明显差异。

The teleconnection structures of zonal anomaly fields of 500 hPa height over the Northern Hemisphere in January and July were studied by using a 36梱ear period data set (1951-1986). The results show that in January the teleconnection structures in zonal anomaly fields of monthly mean height are the same as that in their own monthly mean height field , but in July, the teleconnections in their own height fields are not so obviously, however, in zonal anomaly fields of them there exist four significant teleconnection patterns which present the zonal symmetric feature. The intercomparisons of the teleconnections of the zonal anomaly fieids of height in January with that in July show there ere seasonal variation in these phenomena.