不同形式的加热对冷锋环流影响的数值研究

THE NUMERICAL STUDIES OF THE EFFECTS OF HEATING ON THE COLD FRONTAL CIRCULATION

利用原始方程模式对３种加热形式影响冷锋环流的情形作了数值计算，结果显示，大尺度凝结潜热释放对冷锋非地转环流和锋区垂直运动的影响最大，使之明显增强，它有可能在短时间内使冷锋暧区中产生强的暴雨系统；积云对流加热也能使锋面环流增强，但影响较小；感热加热增强冷锋环流。

The influences of heating in three forms on the cold frontal circulation are discussed using the numerical solutions of a primitive equation model, the results show that the large scale condensational heating has the most significant effect on the cold frontal ageostrophic circulation and vertical motion in the frontal zone,and causes them enhance evidently and it is a possible factor in generating rainstorm system of sufficient intensity in warm sector in a short time;the cumulus convection heating also enhances the frontal circulation,however,its effect is not important;the surface sensible heating has effect on the enhancement of the frontal circulation,and it may be a triggering factor in producing multiple mesoscale rainbands in the frontal zone.