【摘要】 利用1951～2000年北太平洋海温和副高特征量资料,探讨夏半年副高与前期海温的关系,发现影响副高活动的海温关键区赤道东太平洋前期信息最明显,从前期秋季持续至春季都保持与夏半年各月副高强度、西伸脊点位置的高相关;ENSO事件的形成超前于副高强度的转折约半年时间;El Nino年副高持续偏强偏西,La Nina年则相反,脊线位置也有所反映,但不如强度与西伸显著。在此基础上进一步分析表明,福建雨季降水、副高强度与Nino 3区海温存在着大约相一致的年代际振荡与突变时间;雨季降水分布的异常直接受到副高活动的影响,而副高活动又明显受ENSO循环的制约,因而关注赤道东太平洋海温异常及ENSO信息对福建雨季降水分布趋势的预测具有重要意义。更多还原

【Abstract】 Relationship between the variations of West Pacific subtropical high indices in the summer half of the year and SST in North Pacific during previous stage was examined based on a data set of 1951～2000. The correlation between the subtropical high indices and preceding SST in the equatorial East Pacific was the strongest among the others, and has great persistency from last autumn to spring. It is indicated that ENSO events appeared about a half year earlier than the change of the subtropical high activities, and the subtropical high intensities enhanced(weakened) and western ridge point was westward (eastward) in the year of El Nino (La Nina) events. It was also observed that there were similar interdecadal oscillation and abrupt variations of Nino 3 SST、subtropical high intensities and rainfall of rainy season in Fujian therefore, experiments were made on rainfall distribution of rainy season in Fujian. The results showed that the distribution was directly affected by the subtropical high activities, pronouncedly caused by ENSO effect.更多还原