| 王红雷,陈瑶,梁艳，等.华东地区降水时频变化特征与ENSO关系[J].沙漠与绿洲气象,2012,6(1):36~40 |
| 华东地区降水时频变化特征与ENSO关系 |
| Relationship between ENSO and the Precipitation Change in Eastern China |
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| DOI： |
| 中文关键词: ENSO 降水 气温 小波变换 |
| 英文关键词:ENSO precipitation temperature wavelet transformation |
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| 摘要点击次数: 1490 |
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| 中文摘要: |
| 利用Morlet小波变换方法分析了近56a来华东地区降水、气温变化以及ENSO的变化，结果表明，华东地区的降水、温度、海温(ΔSST)以及南方涛动指数(ΔSOI)的月距平序列中都存在多时间层次结构，并且各时间尺度周期分量的强度是不同的。同时又采用交叉小波变换方法，分别分析研究了ΔR、ΔT与ΔSST、ΔSOI相关关系，发现华东地区降水与ENSO在准2～4a周期变化上呈正相关关系，在年代际和8a以上年际间呈正负有规律交替且以正相关为主，而气温与ENSO存在多时间尺度特征。 |
| 英文摘要: |
| In this paper, the variations of precipitation, air temperature and ENSO during recent 56 years in Eastern China are analyzed by the method of Morlet wavelet transformation. Results show that multi-time scale characteristics appeared in all the monthly anomaly series of precipitation, air temperature, sea surface temperature (ΔSST) and southern oscillation index (ΔSOI), while each time-scale period’s intensity is different yet. Meanwhile , cross wavelet transformation was also used to study the correlations of ΔR，ΔT with ΔSST，ΔSOI. It shows positive correlations between precipitation and ENSO at quasi-biennial 2-4 yeas periodic scale, while positive and negative correlations change regularly at inter-decade scale and annual scale above 8 years and positive correlations is more important .The correlations between temperature and ENSO show multi-time scale characteristics. |
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