赤道平流层纬向风的准2年振荡与浙江台风的初步研究

通过研究赤道平流层线同风的准2年振荡（QBO）和浙江台风的关系，指出：浙江台风多发生在赤道平流层纬向风的东西风转向时期；在赤道平流层QBO为西风年时，浙江发生台风的总天数较多，在赤道平流层QBO的西风时段的内发生台风的总个数和总天数都较多，在东风时段，每个台风的生命史较长，厄尔尼诺和拉尼妇使当年浙江台风的总天数编少，厄尔尼诺年使浙江台风的生命史较长，而拉尼娜则相反。

Preliminary analysis of the quasi-biennial oscillation and Zhejiang typhoon

Frequency of the Zhejiang typhoon is related to the equatorial quasi\|biennial oscillation (QBO) of stratospheric zonal wind, the El nino and La nina events from 1949 to 1978 are discussed. It shows: (1) Frequency of the Zhejiang typhoon takes place largely in period of QBO when zonal wind blows from one direction to another; (2) A similar positive anomaly in Zhejiang typhoon days occurs when equatorial winds at 50 hPa are in phase of westerly wind; (3) The number of Zhejiang typhoon, Zhejiang typhoon days are above the normal in period of westerly winds in equatorial stratosphere; (4) Lifespan of every the Zhejiang typhoon is long in the phase of easterly winds period and vice versa in the westerly winds period; (5) Zhejiang typhoon days are less in El nino and La nina events; (6) Lifepsan of every Zhejiang typhoon is long in El nino event, but conversely in La nina event.