Mechanisms and Effects of Tropical Indian Ocean Variability

热带印度洋（TIO）电容效应在印度洋和太平洋盆地之间的相互作用中出现了一个新的概念：厄尔尼诺遥相关导致TIO变暖，而TIO变暖持续存在，并像放电电容器一样在厄尔尼诺衰减后施加气候影响。目前对电容效应的研究多是诊断性的，需要有针对性的模型实验来取得进一步的进展。该项目将研究TIO对厄尔尼诺/南方涛动（ENSO）响应的海洋-大气过程和机制，特别是在ENSO事件衰减期间和之后这种响应的长期持续和气候影响；探索TIO平均状态和变率的年代际变化，并确定其原因。本文将使用最先进的耦合环流模式进行实验和验证关于海洋罗斯比波在维持TIO增温和通过大气开尔文波从TIO到西北太平洋的湿润遥相关中的作用的假设。TIO变暖的远相关效应包括副热带西北太平洋（包括美国附属的北马里亚纳群岛和关岛）降水减少，以及从中国东部到日本的梅雨-白雨雨季异常活跃。该研究是对TIO在气候中的作用的系统研究，将对TIO变率和变化的机制产生新的见解。该项目的成功完成有可能提高对气候变率和变化的认识和预测，从而使东太平洋和西北太平洋内部及其周边的国家/社区受益。培养和支持研究生和博士后。

A new concept of the tropical Indian Ocean (TIO) capacitor effect is emerging for interactions between the Indian and Pacific basins: El Nino teleconnection causes the TIO to warm, and the TIO warming persists and like a discharging capacitor, exerts climatic influences after El Nino decays. Studies of the capacitor effect so far tend to be diagnostic, and targeted model experiments are necessary to make further progress.This project will study ocean-atmospheric processes and mechanisms for the TIO response to El Nino/the Southern Oscillation (ENSO), especially the long persistence and climatic effects of this response during and after the decay of an ENSO event; and to explore interdecadal changes in TIO mean state and variability and determine their cause. A state-of-the-art coupled general circulation model will be used to conduct experiments and test hypotheses regarding the role of ocean Rossby waves in sustaining the TIO warming and moist teleconnection from the TIO to the Northwest Pacific via atmospheric Kelvin wave. Among teleconnective effects of the TIO warming are reduced precipitation over the subtropical Northwest Pacific (including the U.S. affiliated Northern Mariana Islands and Guam), and an anomalously active Meiyu-Baiu rainy season from eastern China to Japan. The proposed research represents a systematic investigation into the TIO's role in climate and will yield new insights into the mechanisms for TIO variability and changes. The successful completion of this project has the potential in improving understanding and prediction of climate variability and change, which benefits countries/communities within and rimming the TIO and Northwest Pacific. Graduate students and postdoctoral will be trained and supported.