NUMERICAL SIMULATION OF SEASONAL MOVEMENTS OF SUBTROPICAL HIGH RIDGE LINE Ⅱ.VAPOR CONDENSATION HEATING

The seasonal movement and jumping of subtropical high ridge line were simulated in the previous paper by using the two-dimensional zonal average model to consider the solar radiation heating.In this paper,the simulation is made by means of the same model considering water vapor condensation heating released from the rainfall belt north of subtropical high in addition to the solar radiation heating.The basic characteristics such as the northward seasonal jumping can still be simulated,and the condensation heating in the model can make the subtropical high ridge line move to the position a little further south than that without the condensation heating.Therefore,it may be realized that the basic characteristics of seasonal movement of subtropical high depend mainly on the solar radiation heating,but the meridional departure of ridge line from its normal latitude position is due to the feedback of drought-waterlogging in the precipitation area to the north of subtropical high.