西北太平洋夏季风的季节内振荡特征  

The Feature of Climatological Intraseasonal Oscillations of Summer Monsoon over Western North Pacific

作　　者：刘静 龚振彬 王慧[2,3] 陈筱涵 

机构地区：[1]福建省福州市气象局,福州350014 [2]国家气候中心气候研究开放实验室,北京100081 [3]国家气象中心,北京100081

出　　处：《福建气象》2007年第5期1-4,共4页

摘　　要：本文采用OLR资料，通过带通滤波方法分析了西北太平洋夏季风的低频振荡特征，分别讨论了在西北太平洋地区夏季风的季节内振荡（30-60d）准双周振荡（10-20d）的性质，发现了在低频振荡的第3位相时对流是最旺盛的，也就表明此时西北太平洋夏季风是最强盛的；而第7位相时，对流是最弱的，西北太平洋夏季风也就是最弱的。这些都表明西北太平洋的夏季风明显受30-60d和10-20d的季节内振荡影响。Using OLR data with band-pass filter method, the low-frequency fluctuation of summer monsoon of the climatological intraseasonal oscillations over Western North Pacific （WNP） is analyzed, and the features of intraseasonal oscillations （30-60days） and quasi-two weeks oscillations （10-20days） were discussed either.The results show that convection in the third-phase of low-frequency fluctuation is the strongest, that＇s to say the summer monsoon over the WNP is the strongest moment.Convection in the 7thphase is the weakest and the summer monsoon is the weakest too.All facts indicate that the summer monsoon over WNP was obviously inflected by the 30-60day and 10-20day intraseasonal oscillations.

关 键 词：带通滤波 西北太平洋 夏季风 季节内振荡 OLR 

分 类 号：P444[天文地球—大气科学及气象学] P433