STUDY OF THE POSSIBILITIES OF USING AN AIR MASS TRANSFORMATION MODEL IN TAIYUAN

An AMT-model,consisting of a trajectory model and a one-dimensional boundary layer model,is tested for trajectories arriving in Taiyuan to study the possibility of using it in Taiyuan.The sensitivity of the model to the different processes was studied.Some parameters of the model were modified for the purpose of forecasting in specific mountainous terrain and dry climate conditions.Results of examples which we have worked out for Taiyuan circumstances for the periods of July(summer)1985 and January(winter)1986,show that the 12h runs of the AMT-model are able to reproduce(on historical data)the sounding of Taiyuan.The AMT-model contributes fruitfully to short-range weather forecasts(12-36h ahead)during periods of severe air pollution and when cold waves occur.