Theory of three-pattern decomposition of global atmospheric circulation  

作　　者：Shujuan HU Bingqian ZHOU Chenbin GAO Zhihang XU Qingwan WANG Jifan CHOU 

机构地区：[1]Key Laboratory for Semi-Arid Climate Change of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China

出　　处：《Science China Earth Sciences》2020年第9期1248-1267,共20页中国科学（地球科学英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2017YFC1502305);the National Natural Science Foundation of China(Grant Nos.41775069&41975076)。

摘　　要：This paper reviews the three-pattern decomposition of global atmospheric circulation(3P-DGAC)developed in recent years,including the decomposition model and the dynamical equations of global horizontal,meridional,and zonal circulations.Compared with the traditional two-dimensional(2D)circulation decomposition method,the 3P-DGAC can effectively decompose the actual vertical vorticity into two components that are caused by the horizontal circulation and convergent/divergent movement(associated with the meridional and zonal circulations).It also decomposes the vertical velocity into the components of the meridional vertical circulation and the zonal vertical circulation,thus providing a new method to study the dynamical influences of convergent/divergent motions on the evolution of actual vertical vorticity and an accurate description of local vertical circulations.The 3P-DGAC is a three-dimensional(3D)circulation decomposition method based on the main characteristics of the actual atmospheric movements.The horizontal,meridional,and zonal circulations after the 3P-DGAC are the global generalization of Rossby waves in the middle-high latitudes and Hadley and Walker circulations in low latitudes.Therefore,the three-pattern decomposition model and its dynamical equations provide novel theoretical tools for studying complex interactions between middle-high and low latitude circulations as well as the physical mechanisms of the abnormal evolution of large-scale atmospheric circulations under the background of global warming.

关 键 词：Horizontal circulation Meridional circulation Zonal circulation Three-pattern decomposition of global atmospheric circulation(3P-DGAC) Dynamical equations 

分 类 号：P434[天文地球—大气科学及气象学]