本项目基于南印度洋海温异常模态在南半球海气相互作用中发挥的积极作用，通过重构技术，分析南印度洋两种典型海温异常模态-南印度洋单极子(SIOU)及南印度洋偶极子(SIOD)的气候特征，以提高对南印度洋两种海温异常型态的认识。分别建立SIOU，SIOD与南半球季风环流系统的耦合场，通过应用MTM-SVD方法研究两种典型海温异常模态与南半球季风环流系统之间的时空耦合关系，动态追踪南半球季风环流系统对南印度洋海温异常变化的响应特征。在统计分析的基础上，设计气候动力模式数值试验，进一步探讨南印度洋海温异常模态影响南半球季风环流系统异常的物理机制，有助于深入了解与东亚季风系统密切相关的南半球海气相互作用，为提高短期气候预测准确率提供科学依据。

According to the active effect of the Southern Indian Ocean on the interaction between the atmosphere and ocean in the Southern Hemisphere, two priciple modes of sea surface temperature anomalies over the Southern Indian Ocean were rebuilded: one is the Southern Indian Ocean Unipole (SIOU), the other one is the Southern Indian Ocean Dipole (SIOD). The climate characteristics of SIOU and SIOD were analyzed respectly. By using the MTM-SVD analysis method, the coupled temporal and spatial evolution features of the SIOU/SIOD and the monsoon circulation system have been analyzed.On the basis of the statistical analysis, the possible physical mechanisms of influences of the SIOU/SIOD on the monoon circualtion in the Southern Hemisphere were studied through the numerical tests. This study will be helpful for a deeper understanding of the interaction between the atmosphere and ocean in the Southern Hemisphere which is closely related to the East Asian Monsoon circulation, and provide a basis for improving the rate of accuracy of short-term climate forecast.