热带太平洋海表面高度特征及其与ENSO事件的关系分析  

Characteristics of Sea Surface Height in Tropical Pacific and Its Relationship With ENSO Events

作　　者：赵加华[1] 刘喜迎[1] 姜皓严 李丽平[3] 

机构地区：[1]解放军理工大学气象学院,南京211101 [2]天津市东丽区气象局,天津东丽300300 [3]南京信息工程大学大气科学学院,南京210044

出　　处：《气象与环境科学》2012年第2期33-39,共7页Meteorological and Environmental Sciences

基　　金：国家自然科学基金主任基金项目(40940008)资助

摘　　要：利用1980-2008年Godas的逐月海表面高度(SSH)资料,分析了热带太平洋不同季节海表面高度季节及年际变化特征,并初步探讨了海表面高度异常与ENSO事件的关系。结果表明:1)就赤道地区而言,东太平洋区域海表面最低,西北太平洋和西南太平洋海表面最高,中太平洋区域较低。2)西北太平洋和西南太平洋海表面高度年际异常大,赤道中东太平洋区域在秋季和冬季的异常较大。3)1、4、10月热带太平洋海表面高度年际异常与ENSO事件有良好的对应关系:在El Nio事件期间,热带太平洋东部海表面高度增加,西部和西南部减小,不同季节异常区略有区别;7月海表面高度异常与ENSO事件关系不密切。Using the monthly sea surface height （SSH） data of Godas between 1980 and 2008, the paper analyzed the different seasons of tropical Pacific sea surface height of seasonal and the annual variations, and preliminarily discussed the correlation between anomalies of the sea surface height and the ENSO events. The results are as follows. 1 ） To the equatorial regions, the sea surface height of East Pacific area is lowest, the Northwest Pacific and Southwest Pacific are highest, the central Pacific region is lower. 2） The interannual variability of sea surface height in Northwest Pacific and Southwest Pacific is large, and the eastern equatorial Pacific in the fall and winter is large. 3） In the tropical Pacific interannual variability of sea surface height at 1,4,10 months have a good correspondence with the ENSO events. When E1 Niflo events occur, the sea surface height of eastern tropical Pacific increased, west and southwest decreased, and the anomalous areas are slightly different in different season. The anomaly spatial form of sea surface height is not close with the ENSO events in July.

关 键 词：热带太平洋 海表面高度异常 时空特征 EOF分解 ENSO 

分 类 号：P732[天文地球—海洋科学]