春季赤道东太平洋海温异常对东亚大气环流春夏季节演变的影响
INFLUENCE OF SPRING EQUATORIAL EASTERN PACIFIC SSTA ONTHE SEASONAL CHANGE FROM SPRING TO SUMMEROF EASTERN ASIAN CIRCULATION
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摘要: 利用NCEP高度场、风场及OLR资料,分析了春季赤道东太平洋海温异常对东亚大气环流春夏季节演变的影响,结果表明春季赤道东太平洋海温偏暖年,南海-菲律宾附近出现异常反气旋,西太平详副高偏强偏西(副高5月占据南海),南海季风爆发迟;而春季海温偏冷年,南海-菲律宾附近出现异常气旋,西太平洋副高偏弱偏东(副高5月东移出南海),南海季风爆发早。数值试验说明春季赤道东太平洋海温异常不仅对东亚大气环流春季季节变化有明显影响,而且此影响可持续到夏季。
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关键词:
- 赤道东太平洋海温异常 /
- 东亚大气环流 /
- 季节演变
Abstract: On the basis of NCEP height,wind and OLR data,the influence of spring equatorial eastern Pacific SSTA on the seasonal change from spring to summer of eastern Asian circulation is studied. Results show that related to the warm (cold) spring SSTA in the equatorial eastern Pacific,the abnormal anticyclone (cyclone) circulation emerges around the South China Sea and the Philippines,the strong (weak) west Pacific subtropical high locates to the west (east) of its normal position,which induces to the late (early) burst of the South China Sea monsoon. The numerical simulations show that the remarkable influence of spring SSTA in the equatorial eastern Pacific on the spring seasonal change of eastern Asian circulation will continue to summer.-
Key words:
- SSTA /
- eastern Asian circulation /
- seasonal change
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[1] 赵振国,陈国珍.初夏西太平洋副高南北位置长期变化的成因及预报[J].热带气象学报,1995,11:223-230. [2] 彭加毅.ENSO对西太平洋副高的影响及与东亚季风的相互作用研究[D].南京:南京气象学院大气科学系,1999,18-21. [3] 彭加毅,孙照渤.春季赤道东太平洋海温异常对西太平洋副高的影响[J].南京气象学院学报,2000,23:191-195. [4] 彭加毅,孙照渤,倪东鸿.春季赤道东太平洋海温异常与东亚夏季风的关系[J].南京气象学院学报,2000,23:385-390. [5] Wu Guoxiong,Liu Hui,Zhao Yucheng,and Li Weiping.A nine-layer atmosphere general circulation model and its performance[J].Adv Atmos Sci,1996,13:1-18. [6] WU Guo-xiong,LAU Ngar-Cheung.A GCM simulation of the relationship between tropical storm formation and ENSO[J].Mon Wea Rev,1992,120:958-977. -
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