通过数值模拟方法，研究了降水和气温对模式分辨率、初始和边界条件的敏感性。结果表明：区域模式RegCM3对新疆1996年冬季和夏季的降水和气温具有一定的模拟能力，气温的模拟要优于降水。分辨率、初始和边界条件对区域模式的模拟结果有较大的影响。模式分辨率的提高，可以增强对气温的模拟能力，尤其是气温随地形变化的特点。分辨率的提高，同样可以改进降水的量级和落区。相同分辨率下，不同初始和边界条件，对降水的模拟结果影响不大。无论分辨率和初始，边界条件如何变化，塔克拉玛干沙漠南麓均有虚假降水出现，说明该模式在刻画复杂地形方面，还存在不足。%The Sensitivities of precipitation and air temperature to several key physical processes, such as resolution, initial and lateral boundary conditions, were studied. The results showed the regional climate model (RegCM3) in some extent could simulate the pattern of precipitation and air temperature in winter and summer in Xinjiang in 1996,and the simulation of air temperature was better than precipitation. The resolution, initial and lateral boundary conditions of model had effects on the simulation results in some extent. With higher resolution,it could improve simulating capacities of air temperature,especially around big terrains. When increasing resolution, the precipitation grade and area also could be improved. Under the same resolution, the initial and lateral boundary conditions of model had no effects on precipitation. In spite of any resolution or initial and lateral boundary conditions,there were false precipitation in southern area of taklimakan desert, which indicated that the model had some deficiencies of depicting complex terrain.
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