从北极高压、南极低压到南北极间的三维异宿轨道  

From Arctic high, Antarctic low to three-dimensional heteroclinic orbit connecting south pole and north pole

作　　者：刘式达[1] 付遵涛[1] 刘式适[1] 

机构地区：[1]北京大学物理学院大气与海洋科学系,气候与海-气实验室,北京100871

出　　处：《物理学报》2014年第21期225-228,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:40975027)资助的课题~~

摘　　要：本文利用球坐标系(λ,φ,r)中的球面地转风关系,说明当等压线形成最简单的纬向分布时,此时南极是低压,北极是高压.但是,当在地转风关系中加入摩擦力后,则南北极由闭合涡旋变成螺旋涡旋,且两极之间形成一条球面上的三维异宿轨道.Under the steady condition, the spherical geostrophic wind relationship in spherical coordinates（λ,φ,r） is applied to illustrate that when isobars take the simplest zonal distribution, the Antarctic is at a low ambient pressure, while the Arctic is at high. However, when friction is incorporated into the geostrophic wind relationship, the closed vortex over Antarctic and Arctic will turn to a spiral vortex, and there will exist a three-dimensional heteroclinic orbit between Antarctic and Arctic on the spherical surface.

关 键 词：北极高压 南极低压 摩擦力 异宿轨道 

分 类 号：P424[天文地球—大气科学及气象学]