CAJ | 학술논문

利用Morlet小波变换方法分析了近56 a来华东地区的降水时频变化特征及其与ENSO关系,结果表明,华东地区的降水、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,分别分析了ΔR、ΔT与ΔSST、ΔSOI相关关系,发现华东地区降水与ENSO在准2~4 a周期变化上呈正相关关系,在年代际和8 a以上年际间呈正负有规律交替且以正相关为主。
이용Morlet소파변환방법분석료근56 a래화동지구적강수시빈변화특정급기여ENSO관계,결과표명,화동지구적강수、해온（ΔSST）이급남방도동지수（ΔSOI）적월거평서렬중도존재다시간층차결구,병차각시간척도주기분량적강도시불동적。동시우채용교차소파변환방법,분별분석료ΔR、ΔT여ΔSST、ΔSOI상관관계,발현화동지구강수여ENSO재준2~4 a주기변화상정정상관관계,재년대제화8 a이상년제간정정부유규률교체차이정상관위주。
In this paper, the variations of precipitation, air temperature and ENSO in Eastern China during recent 56 years were analyzed using the method of Morlet wavelet transformation. The results showed that multi-time scale characteristics appeared in all the monthly anomaly series of precipitation, air temperature, sea surface temperature （ASST） and southern oscillation index （ASOI）,while each time-scale period＇s intensity was different. Meanwhile, cross wavelet transformation was also used to study the correlations of AR,AT with ASST, ASOI. It showed positive correlations between precipitation and ENSO at quasi-biennial 2-4 years periodic scale, while positive and negative correlations aherred regularly at inter-decade scale and annual scale above 8 years and positive correlations dominated showed multi-time scale characteristics. The correlations between temperature and ENSO showed multi-time scale characteristics.