东亚副热带西风急流的变化特征  

Variation characteristics of subtropical westerly jet in East Asia

作　　者：王天奇 王鹏凯[2] WANG Tian-qi;WANG Peng-kai(CMA Public Meteorological Service Center, Beijing 100081;Zouping Meteorological Bureau, Shandong Zouping 256200)

机构地区：[1]华风集团,北京100081 [2]邹平县气象局,山东邹平256200

出　　处：《黑龙江气象》2019年第1期21-23,共3页Heilongjiang Meteorology

摘　　要：利用1979-2013年NCEP/NCAR再分析资料研究了东亚副热带西风急流的变化特征。结果表明:东亚副热带西风急流中心位置、强度有明显的季节变化,冬季偏东偏南、强度最强,夏季偏北偏西、强度最弱。冬半年东亚副热带西风急流南界、北界年际变化的幅度大,夏半年幅度较小。冬季、春季东亚副热带西风急流范围较大,秋季、夏季小,一年内,偏大年或偏小年的出现不具有季节的连续性。Using NCEP/NCAR reanalysis data of 1979 to 2013, analyze the variation characteristics of the subtropical westerly jet in East Asia. The results show that the central position and intensity of the subtropical westerly jet in East Asia have obvious seasonal variations. In winter, it is eastward to the South and the intensity is the strongest, while in summer, it is northward to the West and the intensity is the weakest. The interannual variations of the southern and northern boundaries of the East Asian subtropical westerly jet in the winter half year are larger than those in the summer half year. In winter and spring, the East Asian subtropical westerly jet has a large range, but it is small in autumn and summer. Within one year, the emergence of bigger or smaller years does not have seasonal continuity.

关 键 词：东亚副热带西风急流 西风急流位置 西风急流强度 

分 类 号：P468.0[天文地球—大气科学及气象学]