Dynamics of Teleconnection Patterns

遥联系模式的动态

• 批准号: 0351044
• 负责人: Steven Feldstein
• 金额: $ 40.23万
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-03-15 至 2008-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0351044&HistoricalAwards=false
• 关键词: Dynamics; Teleconnection; Patterns

Teleconnection patterns such as the Pacific/North American and North Atlantic Oscillation play an important role in climate variability. Contrary to the research that focused on the monthly and seasonal averaged characteristics, the dynamical properties of these patterns will be studied on the two-week time-scale which underlies their cycles of growth and decay. The various teleconnection patterns will be examined to find out if their dynamics can be unified into a single coherent framework. Using reanalysis data and a numerical model, the life cycle of teleconnection patterns will be studied using the hypothesis of wave breaking. The grant will also address the question of the relation of the North Atlantic Oscillation to the annular mode, how the North Atlantic Oscillation influences the stratospheric jet, and what dynamical processes determine the lower tropospheric temperature anomalies associated with the teleconnections if the oscillation is driven by wave breaking aloft.This research has the potential to improve weather and climate predictions, which would have great benefit for societal activities. A graduate student will be educated and trained under this grant.

太平洋/北美和北大西洋涛动等遥相关模式在气候变化中发挥着重要作用。与侧重于月度和季节平均特征的研究相反，这些模式的动态特性将在两周的时间尺度上进行研究，这是其增长和衰退周期的基础。将检查各种远程连接模式，以确定它们的动态是否可以统一到一个单一的连贯框架中。利用再分析数据和数值模型，将利用波浪破碎假设来研究遥相关模式的生命周期。该拨款还将解决北大西洋涛动与环形模式的关系问题，北大西洋涛动如何影响平流层急流，以及如果振荡是由以下因素驱动的，那么什么动力过程决定与遥相关相关的较低对流层温度异常高空波浪破碎。这项研究有可能改善天气和气候预测，这对社会活动有很大好处。研究生将在这笔资助下接受教育和培训。