Dynamics of the Boreal Summer Intraseasonal Oscillation: Multiscale Interactions

北方夏季季节内振荡的动力学：多尺度相互作用

• 批准号: 1005599
• 负责人: Bin Wang
• 金额: $ 59.74万
• 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: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1005599&HistoricalAwards=false
• 关键词: Dynamics; Boreal; Summer; Intraseasonal; Oscillation

This project examines the Boreal Summer Intraseasonal Oscillation (BSISO), a tropical mode of variation in precipitation, cloudiness, and winds of large spatial extent. The work examines the impact of the BSISO on the Asian summer monsoon and the extent to which this impact is predictable. The research also considers the relationship between the BSISO and the Quasi-Biweekly (QBW) Oscillation, which is of interest because the combined activity of the BSISO and QBW oscillation is associated with droughts and floods over northern India. The BSISO can be regarded as a large and slow moving envelope of cloud systems and precipitation, and a specific focus of the work is the extent to which upscale transports of heat and momentum from the cloud systems within the BSISO are responsible for its development and propagation. The research will be conducted using a combination of statistical diagnostic analysis, experiments with a global cloud resolving model, and a coupled ocean-atmosphere general circulation model.The BSISO is thought to be important for determining the active and break periods of the Asian monsoon and may thus be of great agricultural importance for a large and densely populated region of the earth. A better understanding of the BSISO may lead to improvements in forecasts of precipitation, floods, and droughts for South and Southeast Asia. in addition, the project provides support and training for a postdoctoral researcher, thereby providing for the development of the scientific work force in this area.

该项目研究了北方夏季季内振荡（BSISO），这是一种在大空间范围内降水、云量和风力变化的热带模式。这项工作研究了BSISO对亚洲夏季风的影响，以及这种影响可预测的程度。该研究还考虑了BSISO和准双周振荡之间的关系，这是有趣的，因为BSISO和QBW振荡的联合活动与印度北部的干旱和洪水有关。BSISO可以被看作是云系统和降水的一个大而缓慢的移动包络，而工作的一个具体重点是BSISO内来自云系统的热量和动量的高级传输在多大程度上负责其发展和传播。研究将采用统计诊断分析、全球云解析模式实验和海洋-大气耦合环流模式相结合的方法进行。BSISO被认为对确定亚洲季风的活跃期和中断期很重要，因此可能对地球上一个人口稠密的大地区具有重要的农业意义。更好地了解BSISO可能会改善南亚和东南亚的降水、洪水和干旱预报。此外，该项目还为博士后研究人员提供支持和培训，从而为该领域的科学劳动力的发展提供支持。