地形强迫对偶极型阻塞形势的影响分析  

Analysis of the Effect of Topography Forcing on Dipole Blocking Situation

作　　者：刘春 刘自牧 叶秣麟 LIU Chun;LIU Zimu;YE Molin(Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China;World Meteorological Organication(WMO)Regional Training Center/China Meteorological Administralion Training Center,Beijing 100081,China;Nejiang Meteorological Bureau,Neijiang 641000,China;Sichuan Meteorological Service Center,Chengdu 610072,China)

机构地区：[1]高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072 [2]中国气象局气象干部培训学院/WMO区域培训中心,北京100081 [3]四川省内江市气象局,内江641000 [4]四川省气象局气象服务中心,成都610072

出　　处：《高原山地气象研究》2020年第2期18-25,共8页Plateau and Mountain Meteorology Research

基　　金：国家自然科学资金项目(41675095、41730959)。

摘　　要：本研究运用多尺度变换和摄动法简化具有地形强迫的正压准地转涡度方程,得到带有扰动项的非线性Shr?dinger方程,在此基础上,采用孤立子直接微扰理论研究地形强迫对偶极型阻塞结构的作用。研究表明:地形强迫对偶极型阻塞发展具有增强和持续作用,其增长率与大地形山体的斜率成正比。In this study,the multi-scale transformation and perturbation method are used to simplify the quasi-geostrophic baratropic vorticity equation with topographic forcing.And the nonlinear Shr?dinger equation with disturbance term is obtained.On this basis,the effect of topographic forcing on the dipole blocking structure is analyzed with the soliton direct perturbation theory.The results show that topographic forcing have enhanced and sustained effect on the development of dipole-type obstructions,which growth rate is proportional to the slope of large topography.

关 键 词：非线性Shrodinger方程 孤立子直接微扰理论 偶极型阻塞形势 

分 类 号：P461[天文地球—大气科学及气象学]