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地理科学 2010

北半球过去2000年气温变化的多尺度分析

, PP. 295-299

杨周,林振山

Keywords: 北半球,气温,太阳活动,多尺度

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Abstract:

对北半球过去2000a重建气温变化的多尺度分析,发现(1)北半球过去2000a气温变化存在准6a、准11a、准21a、准43a、准86a、准247a、准914a等7个不同时间尺度的波动,并且以年际变化、年代际变化和近千年周期为主,不只是在数百年尺度上受太阳活动的驱动,在数十年尺度上也受到太阳活动的影响;(2)北半球在中世纪暖期波动幅度较小,小冰期气温振荡幅度相对较大,1400~1800A.D.这400a间是北半球最寒冷的时期;(3)在未来的几十年里,北半球气温的自然波动将极大地减低因人类活动而导致的全球气候变暖效应。

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