CAJ | 학술논문

为了解北太平洋海面高度年际、年代际变化特征及其影响，基于1961年1月至2010年12月的简单海洋资料同化(SODA)海面高度再分析资料，采用经验正交函数(EOF)、小波分析、交叉小波等方法研究北太平洋海面高度低频时空变化特征及其影响因素.结果表明：1961－2010年期间，北太平洋沿岸地区和副热带海域海面高度存在明显上升趋势，而中纬度太平洋存在下降趋势；海面高度EOF第一模态为年际变化，呈东西反位相分布；第二模态为年代际变化，以黑潮主轴(约30°N)为界，呈“跷跷板”式分布；海面高度异常与Nino3．4指数在热带太平洋和东太平洋呈正相关，在西太平洋为负相关，且相关性随纬度升高而减弱；海面高度异常与太平洋10年涛动(PDO)指数在大洋中纬度海域显著相关，热带中东太平洋海域二者为正相关；北太平洋海面高度年代际变化和年际变化的主要影响因素分别为PDO振荡、厄尔尼诺/南方涛动现象(ENSO).
위료해북태평양해면고도년제、년대제변화특정급기영향，기우1961년1월지2010년12월적간단해양자료동화(SODA)해면고도재분석자료，채용경험정교함수(EOF)、소파분석、교차소파등방법연구북태평양해면고도저빈시공변화특정급기영향인소.결과표명：1961－2010년기간，북태평양연안지구화부열대해역해면고도존재명현상승추세，이중위도태평양존재하강추세；해면고도EOF제일모태위년제변화，정동서반위상분포；제이모태위년대제변화，이흑조주축(약30°N)위계，정“교교판”식분포；해면고도이상여Nino3．4지수재열대태평양화동태평양정정상관，재서태평양위부상관，차상관성수위도승고이감약；해면고도이상여태평양10년도동(PDO)지수재대양중위도해역현저상관，열대중동태평양해역이자위정상관；북태평양해면고도년대제변화화년제변화적주요영향인소분별위PDO진탕、액이니낙/남방도동현상(ENSO).
In order to understand our surrounding environment fully,based on simple ocean data assimila-tion(SODA)reanalysis data,used empirical orthogonal function(EOF),wavelet analysis,cross wavelet and other methods were to study the low frequency variation of sea surface height in the North Pacific O-cean and its impact factors.The results are as follows:the sea surface height trend in coastal areas and sub-tropical waters is rising clearly;the spatial structure of the first EOF mode indicates anti-phase along east-west direction,and the second EOF mode presents"seesaw"distribution which is separated by the Kurishion axis(nearly 30°N );in the north-east Pacific the correlation between sea surface height variation and Nino3 .4 index is positive,but with negative correlation in the north-east Pacific,and the correlation is weakened with latitude increasing;in the mid-latitude Pacific the correlation between sea surface height and Pacific Decadal Osoillation(PDO)index is significantly negative,and the correlation in western tropical Pacific is negative while the correlation in the eastern tropical Pacific is positive;the main factors of North Pacific Sea surface height decadal changes and inter-annual changes are PDO oscillation and EI Nino/La Nina-Southern Oscillation(ENSO).