CAJ | 학술논문

基于海面温度与海面高度异常的月均数据，采用 EOF、SVD 和功率谱分析等方法，对热带印度洋海面温度与海面高度进行特征分析，研究两者在时空结构上的相关性。利用 EOF 方法分析出海面温度第二模态与海面高度第一模态的空间结构类似，呈现偶极型。相关分析与功率谱表明，两模态的时间序列存在滞后相关和类似的周期结构。SVD 结果显示，第一耦合模态的相关系数达0.7左右，且左右场的空间形态呈现东西反相。这表明，海面高度偶极型与海面温度的单极型和偶极型存在着相关。同时，海面高度指数也表现与偶极子指数类似的结构特征。针对上述诊断分析事实特征，对海面温度和海面高度偶极子形成的物理机制进行了初步分析，总结了前人所做的一些工作，指出其中可能的影响因素。
기우해면온도여해면고도이상적월균수거，채용 EOF、SVD 화공솔보분석등방법，대열대인도양해면온도여해면고도진행특정분석，연구량자재시공결구상적상관성。이용 EOF 방법분석출해면온도제이모태여해면고도제일모태적공간결구유사，정현우겁형。상관분석여공솔보표명，량모태적시간서렬존재체후상관화유사적주기결구。SVD 결과현시，제일우합모태적상관계수체0.7좌우，차좌우장적공간형태정현동서반상。저표명，해면고도우겁형여해면온도적단겁형화우겁형존재착상관。동시，해면고도지수야표현여우겁자지수유사적결구특정。침대상술진단분석사실특정，대해면온도화해면고도우겁자형성적물리궤제진행료초보분석，총결료전인소주적일사공작，지출기중가능적영향인소。
Based on the monthly SST and sea level anomaly (SLA)data,the objective of this study is to in-vestigate the correlation between sea surface temperature (SST)and sea surface height in Tropical-Indian Ocean in spatial-temporal structure,with the application of empirical orthogonal function(EOF),singular value decompusition(SVD)and power spectrum method.The EOF results show that the 2nd mode of SST and the 1st mode of SLA share a dipole distribution in spatial structure.Moreover,the two modes demon-strate a lag-correlation and a similar temporal structure by the use of correlation analysis and power spec-trum method.The correlation coefficient of the first coupled mode of SST and SLA based on SVD analysis reaches 0.7,and the spatial structures exhibit a reverse distribution on west and east sides of Indian O-cean.The results indicate that the dipole mode of SLA correlates with the monopole mode and dipole mode of SST.Meanwhile,the SLA index and the Indian Ocean dipole(IOD)index (DMI)both share a similar structure.In addition,a preliminary analysis of the physical mechanism explaining the correlations be-tween the above diagnostic facts was conducted.Possible elements that contribute to the above facts were pointed out by making a summary of the other authors’work.