Nonlinear Oscillations of Semigeostrophic Eady Waves in the Presence of Diffusivity

查看全文 作　　者：[1]QinXU;[2]WeiGU;[3]高守亭

机构地区：[1]NationalSevereStormsLaboratory,Norman,OK73069;[2]CooperativeInstituteforMesoscaleMeteorologicalStudies,UniversityofOklahoma/ScienceApplicationsInternationalCorp.,GlobalModelingandAssimilationOffice,NASAGoddardSpaceFlightCenter,MD20771;[3]InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beifing100029

出　　处：《Advances in Atmospheric Sciences》索引2005年第22卷第1期,共9页

摘　　要：Analyses are performed to examine the physical processes involved in nonlinear oscillations of Eady baroclinic waves obtained from viscous semigeostrophic models with two types of boundary conditions (freeslip and non-slip). By comparing with previous studies for the case of the free-slip boundary condition, it is shown that the nonlinear oscillations are produced mainly by the interaction between the baroclinic wave and zonal-mean state (total zonal-mean flow velocity and buoyancy stratification) but the timescale of the nonlinear oscillations is largely controlled by the diffusivity. When the boundary condition is non-slip, the nonlinear oscillations are further damped and slowed by the diffusive process. Since the free-slip (non-slip)boundary condition is the zero drag (infinite drag) limit of the more realistic drag boundary condition,the nonlinear oscillations obtained with the two types of boundary conditions are two extremes for more realistic nonlinear oscillations. 关键词：非线性振动半地转风波扩散率旋涡势能力学

相关文献

参考文献（30）
引证文献（1）
耦合文献（0）

参考文献(30)

引证文献(1)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Nonlinear Oscillations of Semigeostrophic Eady Waves in the Presence of Diffusivity

参考文献(30)

引证文献(1)

用户提示