热带太平洋海面风的年际变化对海平面变化的影响  

The Influence of Interannual Wind in the Tropical Pacific on Sea Level Variation During El Nino

作　　者：李艳芳[1] 左军成[2] 李娟[2] 陈美香[2] 

机构地区：[1]中国海洋大学海洋环境学院,山东青岛266100 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《中国海洋大学学报（自然科学版）》2012年第12期1-7,共7页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41276018;40976006;40906002);海洋公益性行业科研专项(201005019);国家水体污染控制与治理科技重大专项(2009ZX07423-001-2)资助

摘　　要：海平面变化研究的意义在于掌握其变化规律,预测其未来变化及其可能对人类生存生活环境产生的影响。本文使用随机动态和相关分析方法分析卫星高度计资料,结果发现,除了显著的季节信号外,全球海平面存在显著的2～7a的年际周期,相关分析结果显示,这一年际周期跟ENSO密切相关。在太平洋不同纬度海平面对ENSO事件的响应整体上呈现出高纬衰减的变化特征。ENSO期间海平面变化剧烈,在热带太平洋区域,海平面变化受纬向风应力的调制,具有区域特征,海平面的年际变化与赤道流相关达0.6以上,揭示了风主要是通过Ekman作用影响海平面变化。The purpose of the research on sea level variation change is to grasp its variation law and forecast its variation in the future and evaluate its influence on the living environment of human beings. In this paper, the altimeter data of Topex/Poseidon satellite are analyzed by using random dynamic and correlative analysis methods. The results show that except for obvious seasonal signal, there are notable interannual cycle of 2-7 a in global and each oceans sea level variations. Correlation results reveal that the interannual cycle is close related to ENSO. In the Pacific sea level in different latitudes decays with high latitude responded to El Nino. During El Nino sea level variation changed dramatically, in tropical Pacific region, sea level variation is modulated by zonal wind stress with regional characteristics, interannual sea level signal correlated to equatorial currents, with coefficients more than 0. 6, it indicates that wind influences sea level variation mainly in form of Ekman action.

关 键 词：EL Nino 海平面变化 年际变化 热带太平洋 赤道流 纬向风应力异常 

分 类 号：P731[天文地球—海洋科学]