春季青藏高原东部热力异常与东亚夏季风关系的年代际变化  

Interdecadal Variations of the Relationship of Spring Thermal Anomaly over Eastern Tibetan Plateau and East Asian Summer Monsoon

作　　者：王群[1,2] 郭品文[1] 曹艳艳 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室 [2]盐城市气象局 [3]宁波市气象局

出　　处：《南京气象学院学报》2007年第2期259-265,共7页Journal of Nanjing Institute of Meteorology

基　　金：江苏省高校自然科学研究计划项目(05KJB170072)

摘　　要：利用1948—2002年NCEP/NCAR逐日再分析及月平均资料,分析了春季青藏高原地区大气热源的气候分布和高原东部大气热源的年代际变化特征及其异常与东亚夏季大气环流关系的年代际变化。结果表明:春季青藏高原东部大气热源在1965年存在加强突变,且1970年以后热源加强趋势十分显著。此外,春季青藏高原东部大气热源异常与东亚夏季风强弱具有年代际关系,表现为1977/1978年前春季高原东部大气热源与东亚夏季风存在负相关关系,1977/1978年后两者的关系不明显。Using the NCEP/NCAR daily and monthly reanalysis data from 1948 to 2002, the climatic distribution of heat source over the Tibetan Plateau in spring, the interdecadal variation of the heat source over the eastern Tibetan Plateau, and the relationship of its anomaly to the East Asian summer monsoon are analyzed. The results show that there was an abrupt change in the spring atmospheric appearent heat source over the eastern Tibetan Plateau in 1965 ,and especially ,the increasing trend of the heat source was remarkable after 1970. Furthermore there was an interdecadal relationship between the spring heat source over the eastern Tibetan Plateau and the East Asian summer monsoon. That is to say, there exited a negative correlation between them before 1978, but the relationship has become blurred after 1977.

关 键 词：青藏高原 春季热源异常 东亚夏季风 年代际 

分 类 号：P463.1[天文地球—大气科学及气象学]