夏季亚澳季风区两支越赤道气流年(代)际变化及其与夏季风活动的联系  

Interannual(Interdecadal) Variabilities of Two Cross-Equ atorial Flows in Association with the Asia Summer Monsoon Variations

作　　者：丛菁[1] 管兆勇[1] 王黎娟[1] 

机构地区：[1]南京信息工程大学大气科学学院

出　　处：《南京气象学院学报》2007年第6期779-785,共7页Journal of Nanjing Institute of Meteorology

基　　金：国家自然科学基金资助项目(40675025);江苏省高等学校研究生创新计划项目(E30000008098-3)

摘　　要：利用NCEP/NCAR再分析资料,分析了夏季索马里急流和105°E越赤道气流变化的异同及它们与亚洲夏季风的关系。结果表明:两者强度的年际变化、年代际变化、突变时间及周期都明显不同;两者的年际变化在某些年代显示出很强的负相关关系;索马里急流与亚洲夏季风的南亚夏季风、东亚副热带夏季风和南海夏季风有很好的相关关系,而105°E越赤道气流仅与南海夏季风关系密切;两支越赤道气流对亚洲夏季风系统各成员的影响存在明显差异。The NCEP/NCAR reanalysis data have been used to study differences between the Somali jet and the cross-equatorial flow at 105°E in association with the Asian summer monsoon variations. The results demonstrate that there are significant differences in periodicities as well as the time of climatic jumps of the interannual and interdecadal variations between the two cross-equatorial flows. The strong negative correlations are found between the two cross-equatorial flows in some decades. The Somali jet is closely related to the subsystems including the Indian summer monsoon, East Asian subtropical summer monsoon and South China Sea summer monsoon in the Asian summer monsoon regimes. However, the cross-equatorial flow at 105°E is only closely related to the South China Sea summer monsoon variations. The two cross-equatorial flows are found to have different influences on the circulation changes related to different members of the Asian summer monsoon system.

关 键 词：越赤道气流 亚洲夏季风 年际变化 

分 类 号：P434[天文地球—大气科学及气象学]