Feature Analysis and Numerical Experiments of the Persistent Diabatic Heating in the Summer Monsoon Regions in Eastern China

The NCEP/NCAR reanalysis data is firstly used to analyse the persistent diabatic heating in the summer monsoon regions including South China, the Changjiang River-Huaihe River valley and North China. Seeing that condensation heating is the main part of diabatic heating in the monsoon region, then related numerical experiments in the above three regions are made so as to discuss the possible impacting approaches of condensation heating on general circulation. All numerical experiments reveal that, the condensation heating can firstly induce cyclonic anomaly nearby the heating region in the mid-low troposphere, then the anomaly propagates northeastward, and the wave train forms in mid-high latitudes finally, which indicates the northeastward dissipation of latent heat energy. Moreover, the difference of instance experiments shows that the initial response of atmosphere to the condensation heating depends a lot on the general circulation in the initial stage of heating, and the anomaly distribution similar to the vertical circulation structure may be one of the possible response modes.