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近百年东亚冬季风的突变性和周期性
引用本文:徐建军,朱乾根.近百年东亚冬季风的突变性和周期性[J].应用气象学报,1999,10(1):1-8.
作者姓名:徐建军  朱乾根
作者单位:1.南京气象学院
摘    要:该文利用海平面气压场资料,计算了1873~1990年的东亚冬季风强度指数,并用滑动t检验和奇异谱分析方法(SSA)对近百年的东亚冬季风的突变性和周期性进行了研究。研究表明:东亚冬季风强度具有显著的年际及年代际变化。当冬季风强时,中国大部分地区温度降低,蒙古高压升高,阿留申低压加深。当冬季风弱时,天气及环流特点几乎与之相反。东亚冬季风存在QBO、LFO和IDO现象,各振荡分量都具有年代际的差别。

关 键 词:东亚冬季风    年际变化    年代际变化

Sudden and Periodic Changes of East Asian Winter Monsoon in the Past Century
Xu Jianjun,Zhu Qiangen,Zhou Tiehan.Sudden and Periodic Changes of East Asian Winter Monsoon in the Past Century[J].Quarterly Journal of Applied Meteorology,1999,10(1):1-8.
Authors:Xu Jianjun  Zhu Qiangen  Zhou Tiehan
Affiliation:1.(Nanjing Institute of Meteorology, Nanjing 210044)
Abstract:Based on mean sea level pressure (MSLP) data, the East Asian winter monsoon intensity indexes were calculated from 1873 to 1990. The sudden and periodic changes of East Asian winter monsoon were studied by the method of sliding t-test and singular spectral analysis (SSA). The results show that East Asian winter monsoon intensity displays obvious interannual and interdecadal variations. When winter monsoon increases, the temperature in the most regions of China decreases. Mongolian high raises and Aleutian low deepens, and reverse in weak winter monsoon year. Meanwhile, East Asian winter monsoon shows quasi-biennial oscillation (QBO), low frequency oscillation (3~7 years) and interdecadal oscillation (more than 10 years). These three periodic oscillations appear to have strong interdecadal variability.
Keywords:East Asian winter monsoon  Interannual variation  Interdecadal variation  
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