摘要
应用一个在NCARCCM3(T42L18)气候模式基础上发展的CCM3(R15L9)长期预报模式,模拟研究了北太平洋海区持续暖海温对东亚初夏大气环流的影响。结果表明,北太平洋海区海温持续偏暖引起亚洲—太平洋地区(20～40°N)对流层出现明显的增温带,有利于初夏东亚南支西风急流的减弱、北跳,东风急流加强北移和西太平洋副热带高压加强北抬,还有利于亚洲夏季风发展和东亚大陆近地面平均温度回升。上述环流特征,加速了东亚初夏季节转换过程。
By employing the CCM3(R15L9) long-rang spectral model developed on the basis of CCM3 climate model,study is undertaken of the effects of the persistent positive sea surface temperature anomaly(SSTA) in the Northern Pacific ocean on East Asian atmospheric circulation in the early summer.The results indicate that the persistent positive SSTA in the North Pacific indues the warming in the middle and upper troposphere in the Asia-Pacific region between 20～40°N,thus favorable to the weakening and north Jump of the East Asian subtropical westerly jet in the early summer,the strongthening and northward advance of the tropical upper-level easterlies and the northwest Pacific subtropical high;and also favorable to the development of the Asian summer monsoon and the surface mean temperature rising overEast Asian land.All those circulation characters are beneficial to accelerating the season transition in East Asia in the early summer.
出处
《南京气象学院学报》
CSCD
北大核心
2004年第5期623-631,共9页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金资助项目(40375024)
山东省气象局重点科研项目(5030376)
关键词
持续暖海温
东亚初夏季节
环流转换
数值试验
persistent warm SSTA
season transition in the early summer
numerical simulation
