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

作　　者：彭加毅[1] 孙照渤[1] 

机构地区：[1]南京气象学院大气科学系,江苏南京210044

出　　处：《热带气象学报》2001年第4期398-404,共7页Journal of Tropical Meteorology

基　　金：国家重点基础研究发展规划G1998040901-3与南京大学博士后基金联合资助

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。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.

关 键 词：赤道东太平洋海温异常 东亚 大气环流 季节演变 春季 

分 类 号：P732.6[天文地球—海洋科学] P434