对流凝结加热的垂直分布与低纬大气的30～60天低频振荡  

VERTICAL DISTRIBUTION OF CONVECTIONAL HEAT AND 30~60-DAY LOW-FREQUENCY OSCILLATION IN THE TROPICS

作　　者：薛洪斌[1] 钟中[1] 薛峰[2] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]中国科学院大气物理研究所,lasg北京100029

出　　处：《热带气象学报》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

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.

关 键 词：Wave—CISK机制 对流凝结加热 CISK—Kelvin波 CISK—Rossby波 30~60天低频振荡 

分 类 号：P425.81[天文地球—大气科学及气象学]