EI Nino类型年对低纬大气环流及我国天气的影响

INFLUENCES OF EL NINO TYPICAL YEARS ON THE ATMOSPHERIC CIRCULATION IN LOW LATITUDE AND THE WEATHER IN CHINA

应用热带格点风及OLR资料,通过统计和物理量诊断,讨论了El Nino不同过程类别的低纬环流的差异和季节性特征以及对我国天气气候的影响。得到如下主要结果:(1)El Nino年的不同类型间存在着差异。它们在常定动能、动量和温度的分布特征等方面都存在着明显的差异。(2)El Nino不同的过程类别对我国降水、气温的影响不同,且表现出明显的季节变化。

By statistic and physical quantity diagnosis, differences between groups of low - latitude circulation processes corresponding to El Nino events and their seasonal characteristics are discussed using tropical grid point winds and OLR data . It is found that there are significant difference between them in the distribution of constant kinetic energy , momentum and temperature . The groups of circulation processes have different effects on procipitation and temperature in China, showing marked seasonal variations.