摘要
运用一个包含Wave-CISK机制的斜压半地转8层模式和本征函数展开方法,研究了三种不同的对流凝结加热廓线对低纬大气的30~60天低频振荡的影响。研究表明,不同的加热廓线分布时30~60天低频振荡具有不同的相速和周期,并且低频振荡特征相速的量级都是o(10 m/s),由Wave^CISK机制激发的低频CISK-Kelvin波和CISK-Rossby波都是稳定的。同时,还进一步揭示了不同加热廓线对低纬大气30~60天低频振荡垂直结构的影响。
Based on a baroclinic semi-geostrophic model including Wave-CISK, we discuss the influences of different vertical distribution of heating profiles on 30 ~ 60-day low-frequency oscillation(LFO) in the tropics, with a 8-layer dynamic model and eigenfunction method. The results show that the phase velocity and period of the LFO is sensitive to the heating profiles, and the phase velocity is in order of o(10 m/s). The low-frequency CISK-Kelvin wave and CISK-Rossby wave, triggered by Wave-CISK mechanism, are stable. The influence of different heating profiles on the phase velocity and the vertical structure of LFO are also revealed.
出处
《热带气象学报》
CSCD
北大核心
2003年第4期397-404,共8页
Journal of Tropical Meteorology
基金
中国科学院资源与环境领域知识创新工程重要方向项目(KZCX2-203)
国家自然科学基金项目(40275021
49805004)资助
