The influence of eddy viscosity on the distribution of subtropical quasi-stationary planetary waves in summeris analysed theoretically.It is found that since the basic flow is very weak,the eddy viscosity may play an impor-tant role for the subtropical planetary-scale motion in summer.A linear,quasi-geostrophic,34-level spherical coordinate model is also utilized to calculate the differencesof quasi-stationary planetary waves and of quasi-stationary disturbance pattern responding to forcing bytopography and heat sources under the different eddy viscosities.The computed results show that thecoefficient of eddy viscosity considerably influences the strength of the subtropical planetary-scale circulationin summer.
展开▼
