THE IMPACTS OF MADDEN–JULIAN OSCILLATION ON SPRING RAINFALL IN EAST CHINA  

作　　者：白旭旭 李崇银 谭言科 关志佳 

机构地区：[1]Institute of Meteorology,PLA University of Science and Technology [2]Unit 61741 of People’s Liberation Army [3]LASG,Institute of Atmospheric Physics,Chinese Academy of Sciences

出　　处：《Journal of Tropical Meteorology》2013年第3期214-222,共9页热带气象学报（英文版）

基　　金：National Natural Science Foundation of China(U0833602)

摘　　要：Phase composite analyses are conducted to investigate the possible effect of the Madden–Julian oscillation(MJO)on the spring rainfall anomalies in East China by using the Real-time Multivariate MJO(RMM)index from Australian Meteorological Bureau.The results show that the rainfall anomalies over the mid-and lower-valley of Yangtze River are positive when the MJO shifts eastward to the mid-and eastern-Indian Ocean,and anomalous precipitation over South China are positive when the MJO moves further eastward to the maritime continent,whereas spring rainfall anomalies over East China are negative in the other MJO episodes.The MJO impacts on the precipitation over East China result from the changes in large-scale atmospheric circulation as well as vorticity and water vapor transportation in the mid-and lower-troposphere.Phase composite analyses are conducted to investigate the possible effect of the Madden–Julian oscillation(MJO)on the spring rainfall anomalies in East China by using the Real-time Multivariate MJO(RMM)index from Australian Meteorological Bureau.The results show that the rainfall anomalies over the mid-and lower-valley of Yangtze River are positive when the MJO shifts eastward to the mid-and eastern-Indian Ocean,and anomalous precipitation over South China are positive when the MJO moves further eastward to the maritime continent,whereas spring rainfall anomalies over East China are negative in the other MJO episodes.The MJO impacts on the precipitation over East China result from the changes in large-scale atmospheric circulation as well as vorticity and water vapor transportation in the mid-and lower-troposphere.

关 键 词：MJO activities spring precipitation over East China atmospheric CIRCULATION ANOMALIES DIVERGENCE of water vapor flux 

分 类 号：P426.6[天文地球—大气科学及气象学]