后秋西太平洋赤道对流雨探讨  

PRELIMINARY STUDY OF RAINFALL IN WEST EQUATORIAL PACIFIC DURING LATE AUTUMN

作　　者：王昭正[1] 张庆荣[1] 

机构地区：[1]中国科学院南海海洋研究所

出　　处：《热带海洋》1990年第1期1-8,共8页

摘　　要：本文利用“实验3”号船1986-1988年对西太平洋3次考察的洋面气象资料,结合天气图和卫星云图,对后秋季节西太平洋赤道地区的对流雨进行统计学、天气学和动力学分析。分别阐明了后秋西太平洋赤道对流雨和大尺度热带环流以及中尺度天气系统的相关关系;指出了赤道对流雨的日变化规律;探讨了引起赤道对流雨的中尺度涡旋的动力成因和前期西太平洋对流雨偏多可能是导致厄尔尼诺发生的重要原因之一。The convective rainfall is analysed in statistics, synoptic meteorology, and dynamics in this paper by using meteorological data obtained from R.V.'Shiyan 3' in West Equatorial Pacific during the late autumn of 1986, 1987 and 1988, in combination with weather charts and satellite images. The relationship between the tropical circulation, the meso-scale weathei system and the rainfall in West Equatorial Pacific during late autumn is elucidated lespectively in the paper. The diurnal change of rainfall in West Equatorial Pacific is indicated. We also discussed the dynamic cause of the meso-scale voitex that caused lain-fall in the West Equatorial Pacific, and the interaction between the rainfall inWest Equatorial Pacific and El Nino. In paiticular, more rainfall than normally during pre-El Nino period in the West Equatorial Pacific, might be one of the important reasons for the occurance of El Nino.

关 键 词：秋季 太平洋 热带环流 动力成因 赤道对流雨 厄尔尼诺 

分 类 号：P732[天文地球—海洋科学]