北半球夏季急流遥相关:进展与展望  

Waveguide Teleconnections in the Boreal Summer:Progress and Perspectives

作　　者：王林[1] 徐霈强 WANG Lin;XU Peiqiang(Center for Monsoon System Research,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029)

机构地区：[1]中国科学院大气物理研究所季风系统研究中心,北京100029

出　　处：《大气科学》2024年第1期287-304,共18页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金项目41925020,42005057,42261134532。

摘　　要：急流遥相关是沿急流波导传播的准静止行星尺度波列,在大气环流的维持和演变中有重要作用,其异常活动常伴随极端天气气候事件的发生。研究急流遥相关在不同时间尺度的变异特征和机理不仅可以加深对大气环流变化规律的理解,还可以为相应时间尺度上的天气预报、气候预测乃至气候预估提供科学依据。根据波导的性质,北半球夏季的急流波导可以分为以正压效应为主要维持机制的副热带急流波导和以斜压效应为维持机制的极锋急流波导。本文聚焦夏季急流遥相关活动最为活跃的欧亚大陆地区,在回顾急流遥相关理论的基础上,简要总结了近年来关于夏季副热带急流遥相关和极锋急流遥相关的形成条件、动力机制、气候影响和未来变化的研究进展,并展望了一些未来值得继续深入研究的问题。Waveguide teleconnections are quasi-stationary planetary waves propagating along the jet stream waveguide.They play a crucial role in the maintenance and evolution of atmospheric circulation,and their unusual activities often lead to extreme weather and climate events.Exploring the variation and mechanism of waveguide teleconnections on various timescales can not only deepen our understanding of atmospheric circulation dynamics but also serve as a scientific basis for weather forecasting,climate prediction,and climate projection on different timescales.Based on the dynamic properties of the jet stream waveguide,the atmospheric waveguide can be classified into subtropical and polarfront jet waveguides,which are primarily maintained by the barotropic and baroclinic effects,respectively.This paper focuses on the waveguide teleconnections in the boreal summer over the Eurasian region and when and where waveguide teleconnections are most active.The history and theory of waveguide teleconnections are first reviewed,followed by the summary of recent advances in the study of waveguide teleconnections along subtropical and polar-front jets,including their formation conditions,dynamic mechanisms,climate impacts,and future changes.Finally,issues regarding the waveguide teleconnection that warrant future investigation are discussed.

关 键 词：急流 大气波导 大气遥相关 行星波 波流相互作用 

分 类 号：P44[天文地球—大气科学及气象学]