The Mechanisms for Extratropical Atmospheric Response to SST Anomaly: Interaction Between Direct and Indirect Responses

温带大气对海温异常的响应机制：直接响应与间接响应之间的相互作用

• 批准号: 9422507
• 负责人: Sumant Nigam
• 金额: $ 26.33万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1999-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9422507&HistoricalAwards=false
• 关键词: Mechanisms; Extratropical; Atmospheric; Response; SST

This grant aims at achieving deeper understanding of the direct and indirect extratropical response to tropical SST anomalies. The novelty here is to examine the global response to tropical SST anomalies as a slowly evolving dynamical process (instead of a steady process as in the previous studies). The indirect response includes the process of organizing extra tropical transient eddies in to stormtrack anomalies and the subsequent symbiotic development of the anomalies in both large-scale quasi-stationary waves and storm tracks. In practical terms, this research is important for improving seasonal to interannual climate forecasting by dynamical physical methods and, in theoretical terms, this is basic research that leads to a better understanding of dynamical processes at work in the long range evolution of climate and weather.***

这项资助旨在加深对热带海温异常的直接和间接温带反应的了解。这里的新颖之处在于将全球对热带海温异常的响应作为一个缓慢演变的动力过程来研究（而不是像以前的研究那样是一个稳定的过程）。间接响应包括将热带外瞬变涡旋组织到风暴路径异常的过程，以及随后大尺度准平稳波和风暴路径异常的共生发展。在实践中，本研究对于利用动力物理方法改进季节到年际气候预报具有重要意义；在理论方面，本研究是基础研究，有助于更好地理解气候和天气长期演变中的动力过程