2005年5—6月西北太平洋副热带高压位置异常可能原因浅析  

Analysis of the subtropic-high ridge anomaly in the mid latitude over the northwestern Pacific in May to June 2005

作　　者：翟亮[1] 张秀芝[2] 孙即霖[3] 吕心艳 

机构地区：[1]北京市气象局,北京100089 [2]国家气候中心,北京100081 [3]中国海洋大学海洋环境学院,山东青岛266003 [4]国家气象中心,北京100081

出　　处：《热带海洋学报》2012年第4期58-65,共8页Journal of Tropical Oceanography

基　　金：国家自然科学基金重点项目(40930844;10735030);国家自然科学基金项目(40676012)

摘　　要：通过奇异值分解(SVD)分析表明,20o—35oN、120o—165oE为强海气相互作用区(简称为关键区);该区域SST变化与500hPa位势高度场有较密切的关系,分析发现2005年5—6月关键区存在较强的上升运动和强烈的潜热释放,并初步认为这是造成副热带高压稳定偏南的原因之一,且关键区SST的偏冷与副热带高压持续偏南之间存在一个正反馈机制。关键区北部海面温度升高也可能是西北太平洋副热带高压在6月底的最终北抬的原因之一。The singular value decomposition（SVD） analysis showed that the air-sea interaction is strong in 20o 35oN and 120o 165oE（referred to as the the key area）.There is significant connection between sea-surface temperature（SST） change and 500-hPa geopotential height in the region.Analysis also showed that there is a strong upward motion and a strong latent-heat release in the key area in May and June 2005,and that it is one of the reasons that caused the subtropical high southerly and stably.A positive feedback may exist between the SST and the subtropical high in the key area.SST increased north of the key area,which may also be a reason that led to the northwestern Pacific subtropical high to rapidly move northward by the end of June.

关 键 词：奇异值分解 海温异常 副热带高压 海气相互作用 

分 类 号：P732[天文地球—海洋科学]