中文摘要：

在实际大气中凝结加热对中尺度系统的发展起着重要作用，通过数值计算方法研究了扰动的波谱和谱函数，重点讨论在凝结加热条件下扰动不稳定的性质及特征。研究结果表明：考虑凝结加热时，在相同垂直切变条件下，随着波长的减小，不稳定增长率增大，即加热放宽了不稳定出现的条件，且尺度越小的扰动，对不稳定的条件要求越低。当Nse2〈0时，在大尺度和中口尺度波段，风切变有利于不稳定的发展，由风切变造成的动力学不稳定是主要的，而凝结加热造成的热力学不稳定处于次要地位；而在中卢尺度波段，风切变则抑制不稳定发展，此时凝结加热造成的热力学不稳定处于主要地位。

英文摘要：

The condensation heating has an important effect on the development of mesoscale systems in a real turbulent atmosphere. In this work, the spectrum and spectral function of the disturbance was studied by a numerical calculation method, and the character and structure of instability in non-adiabatic disturbance was discussed. The result was as follows. When heating was considered, the unstable growth rate increased with the decrease of wavelength under the same vertical shear. Thus heating broadened the conditions that cause instability, and the smaller the scale of the disturbance, the lower the unstable conditions required. When N2 〈 O, the wind in large-scale and meso-a scale band shear was conducive to the development of instability, and the dynamic instability caused by wind shear was primary, and the thermodynamic instability caused by condensation heating was secondary. In the meso-fl scale band, the wind shear produced inhibition on the development of the instability, and the thermodynamic instability was primary.