Low-Frequency Zonally-Averaged Flow Variability Studied with Models and Observations

通过模型和观测研究低频区域平均流量变化

• 批准号: 9416701
• 负责人: Steven Feldstein
• 金额: $ 28.88万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416701&HistoricalAwards=false
• 关键词: Low; Frequency; Zonally; Averaged; Flow

Abstract ATM-9416701 Feldstein, Steven Pennsylvania State University Title: Low-Frequency Zonally-Averaged Flow Variability Studied with Models and Observations The primary objective of the proposed research is to investigate the role of the zonally averaged flow on atmospheric low frequency variability. A combined approach of examining the real observations, the outputs of idealized simple models and realistic complex global models is being adopted to achieve this goal. This approach can enhance our understanding of the fundamental dynamics of low frequency variability of the atmosphere. Details of dynamical mechanisms associated with the maintenance, onset and decay of both high and low zonal index phases will be examined. Regional teleconnection patterns and blocking and their relationship with zonal index will be studied. The role of SST in the interannual variability of the zonal index will also be investigated. Low frequency oscillations of the atmosphere are intimately related to medium and extended range forecasting. This research has potential for improving forecast models and in turn forecasts.

摘要ATM-9416701 Feldstein，史蒂芬宾夕法尼亚州立大学标题：使用模型和观察研究的低频划分划分的流量变异性是拟议研究的主要目的是研究区域平均流动流对大气低频可变性的作用。 一种合并的方法来研究实际观察结果，正在采用理想化的简单模型和现实的复杂全球模型的输出来实现这一目标。 这种方法可以增强我们对大气低频变异性基本动力学的理解。 将检查与高层和低区域指数阶段的维护，发作和衰减相关的动力学机制的细节。 将研究区域远程连接模式和阻塞及其与区域指数的关系。 SST在区域指数的年际变异性中的作用也将进行研究。 大气的低频振荡与中等和扩展范围预测密切相关。这项研究具有改善预测模型和预测的潜力。