Dynamics of Teleconnection Patterns

太平洋/北美和北大西洋涛动等相互联系的模式在气候变率中起着重要作用。相反的研究，侧重于每月和季节的平均特征，这些模式的动力学特性将研究的两个星期的时间尺度，其增长和衰减的周期。各种遥相关模式将被检查，以找出它们的动态是否可以统一到一个单一的连贯框架。利用再分析数据和数值模式，将利用波破碎假设研究遥相关型的生命周期。该赠款还将解决北大西洋涛动与环形模式的关系，北大西洋涛动如何影响平流层急流，以及如果振荡是由高空波浪破碎驱动的，什么动力学过程决定与遥相关相关的低对流层温度异常的问题。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的好处。研究生将根据这项赠款接受教育和培训。

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.