Ni~■o1+2海区冷、暖水期西太平洋副高的特征及其对东亚季风的影晌  

Features of the Western Pacific Subtropical High duringthe Warm and Cool Periods of Nino 1+2 Area andIts Influence on the East Asian Monsoon

作　　者：陈月娟[1] 周任君[1] 武海峰[1] 

机构地区：[1]中国科学技术大学地球和空间科学系,合肥230026

出　　处：《大气科学》2002年第3期373-386,共14页Chinese Journal of Atmospheric Sciences

基　　金：国家重点基础研究发展规划项目G1998040900第一部分;国家自然科学基金资助项目49635170共同资助

摘　　要：摘 要 通过对海温资料和500 hPa位势高度、垂直速度、850hPa的水平风分量资料的分析，探讨ENSO的各不同阶段西太平洋副高和东亚季风的变化特征。结果表明：办道东太平洋海温与两太平洋副高有密切的关系。Nino 1+2区海温有明显的10年际变化，与西太平洋副高的10年际变化非常吻合；前期Nino 1＋2区为冷、暖水期时西太平洋副高的强度和位置有明显差异，前期为暖水期时夏季的太平洋副高较强、范围向西和向南伸展，冷水期反之、西太平洋副高较弱，位置偏东偏北。西太平洋副高的变化进一步影响东业季风和我国的降水。这种影响在Nino 1＋2区海温变化后4～6个月最明显。 因此，前即Nino 1+2区海温的变化可以为东亚季风和我国降水的长期预报提供依据。Abstract Based on the data of geopolential height and vertical velocity of 500 hPa, wind field of 850 hPa and SST, the features of the western Pacific subtropical high and the east Asian monsoon at different stage of ENSO arc discussed. The results show that there is a close relationship between the western Pacific subtropical high and SST in the eastern equatorial Pacific. The decade variations of SST in Nino 1+2 area is coincident with the variations of the western Pacific subtropical high. The strength and position of the western Pacific subtropical high in the period following warm SST in Nino 1+2 area are very different from those in the period following cool Nino 1+2 SST. In ihc period following the warm SST, the western Pacific subtropical high is stronger, extends westward and southward, while it is reverse in the period following the cool SST, The subtropical high is weaker and its location is usually to the north and east. The changes of the western Pacific subtropical high will impact the Asian monsoon and the precipitation of China. These influences are clearest in 4-6 months after the SST in Nino 1+2 area is changed. Therefore, the variations of SST in Nino 1+2 area of the previous period can be a basis for the long-term prediction of the western Pacific subtropical high and the east Asian monsoon.

关 键 词：海温变化 西太平洋 副热带高压 东亚季风 冷水期 厄尔尼诺 暖水期 

分 类 号：P732[天文地球—海洋科学]