Mechanisms and Effects of Tropical Indian Ocean Variability

热带印度洋变化的机制和影响

• 批准号: 0854365
• 负责人: Shang-Ping Xie
• 金额: $ 52.54万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-15 至 2013-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0854365&HistoricalAwards=false
• 关键词: Mechanisms; Effects; Tropical; Indian; Ocean

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.

热带印度洋（TIO）电容器效应的新概念正在出现在印度和太平洋盆地之间的相互作用：El Nino Teleconnection使TIO变暖，Tio变暖仍然存在，就像放电电容器一样，在El Nino eel Nino Elino Elino Emborcts eel Nino Empact eel Nino Empacters持续发展。腐烂。到目前为止，对电容器效应的研究往往是诊断性的，有针对性的模型实验对于进一步的进展是必要的。该项目将研究海洋 - 大气过程和TIO对El Nino/Southern振荡（ENSO）的TIO响应的机制，尤其是在ENSO事件衰减期间和之后，这种反应的长期持久性和气候影响；并探索TIO平均状态和可变性的次数变化并确定其原因。最先进的耦合一般循环模型将用于进行实验和检验假设，以了解海洋罗斯比通过大气开尔文波从TIO到西北太平洋的TIO变暖和潮湿的远程连接中的作用。在TIO变暖的链球化作用中，西北太平洋（包括美国附属北部玛丽安娜群岛和关岛）的降水量减少，以及从中国东部到日本的众所周知的Meiyu-Baiu雨季。拟议的研究代表了对TIO在气候中作用的系统研究，并将对TIO变异性和变化的机制产生新的见解。该项目的成功完成有可能改善对气候变化和变化的理解和预测，这使TIO和西北太平洋地区的国家/社区受益。研究生和博士后将接受培训和支持。