SPECTRUM—90时期大气10──20天准周期振荡对热带气旋转向路径的影响  

The Effect of the Atmospheric 10-20 Day Oscillation on the Recurving Tropical Cyclones during SPECTRUM-90

作　　者：胡坚[1] 陈雪峰[1] 费亮[1] 

机构地区：[1]上海台风研究所

出　　处：《大气科学》1994年第5期520-526,共7页Chinese Journal of Atmospheric Sciences

摘　　要：本文研究了ＳＰＥＣＴＲＵＭ—９０时期，大气１０－２０天周期振荡对西北太平洋转向台风路径的影响，结果表明，这种影响是显著的。在ＳＰＥＣＴＲＵＭ－９０时期，１０－２０天周期振荡比较活跃，西北太平洋副热带高压的周期性退缩现象是来自中、高纬和热带的１０－２０天周期低压扰动共同影响所致，这也是导致热带气旋转向运动的一个重要原因。进一步研究还发现，在ＳＰＥＣＴＲＵＭ—９０时期，存在着一支源于热带西北太平洋上呈经向排列的纬向风波列，热带波动沿此波列向北传播，在一定程度上，可以推动热带气旋北上转向。The effect of the 10-20 day oscillation in the atmosphere on the recurving typhoon tracks over the northWestern Pacific during SPECTRUM -90 has been studied. Results show that the effect is remarkable. During the SPECTRUM-90 period, the 10-20 day oscillation was very active and was the important cause for the periodical change of the advance or retreat of the subtropical high and for the recurying typhoon motion. It is found from further studies that there existed a wavetrain originating at the tropical East Asia in a meridional arrangement. The tropical wave propagated northward along the wavetrain, which could result in the northward motion of the recurving typhoon to some extent.

关 键 词：大气 准周期振荡 热带气旋 路径 

分 类 号：P444[天文地球—大气科学及气象学]