雅安地区整体具有典型的“迎风坡”和“喇叭口”地形，对雅安地区云-降水的观测和研究一直是中国山地气象的热点问题之一。本文利用2023年雅安地区秋雨期的Ka波段毫米波云雷达、K波段微雨雷达和 DSG4 型激光雨滴谱仪观测资料，对雅安秋雨期的冷暖两类云-降水展开了研究和对比。结果表明：（1）雅安秋雨期暖云-降水（WCP）的发生频次高于冷云-降水（CCP），但降水强度普遍较弱，累计雨量更少。（2）在垂直结构和宏观特征方面，WCP与CCP存在明显差异。CCP的雷达回波反射率因子Z高频区分布更广、回波更强，不同高度 Z高频区斜率大小反映出冰相粒子增长机制和速率与 WCP液态云雨滴碰并增长速率的差异；CCP的线性退极化比 LDR在零度层附近因冰相粒子融化突增，平均多普勒速度Vm高频区值更小，速度谱宽W高频区值更大，表明其雨滴平均尺度更大、浓度分布更宽。宏观参数上，CCP的云底和云顶明显更高，云层更厚，且数值分布更分散。（3）在微观特征方面，两类云-降水的雨滴谱随高度变化不同。随高度下降，CCP的小雨滴浓度因冰相粒子融化和雨滴碰并作用，呈先增后减趋势；WCP的小雨滴浓度受蒸发、碰并、水汽输送和上升气流托举高度影响，呈波动式变化。两类云-降水的中大雨滴浓度整体上都随高度下降而升高。从不同高度雨滴浓度差异来看，在455 m以上，WCP所有粒径雨滴浓度几乎都低于CCP；在455 m以下，WCP的小雨滴和大雨滴浓度高于CCP，中雨滴浓度较低。（4）不同降水强度下的雨滴谱对比表明，降水较弱时，WCP所有粒径雨滴浓度都较CCP低，但当降水达到一定强度后（雨强 R≥5 mm·h-1），WCP 会产生更多的小雨滴和少部分更大的雨滴。在 3 km 以下高度，WCP的Z、LDR、Vm和W的少部分极大值均较CCP大，这是由于该地区低空急流与地形抬升的协同作用，使得WCP小雨滴在上升气流中反复碰并形成中大雨滴。

The Ya'an area has a typical "windward slope" and "trumpet" topography，the observation and study of cloud-precipitation in the Ya'an area has always been one of the hot issues of mountain meteorology in China. In this paper，using the observation data of Ka-band millimeter-wave cloud radar，K-band micro-rain radar and DSG4 laser raindrop spectrometer during the autumn rainy season in Ya'an area in 2023，the two types of cloudprecipitation in Ya'an during the autumn rainy period are studied and compared. The results show that（1）the frequency of warm cloud-precipitation（WCP）is higher than that of cold cloud-precipitation（CCP）during the autumn rainy period in Ya'an，but the intensity of precipitation is generally weaker and the cumulative rainfall is less.（2）In terms of vertical structure and macroscopic features，there are obvious differences between WCP and CCP：the radar echo reflectivity factor Z high-frequency region of CCP has a wider distribution and stronger echo，and the magnitude of the slope of Z high-frequency region at different heights reflects the difference be‐ tween the ice-phase particles' growth mechanism and rate and that of WCP's liquid cloud raindrops' touch-and-go growth rate；CCP's linear depolarization ratio，LDR，increases abruptly near the zero-degree layer due to the melting of ice-phase particles. The mean Doppler velocity Vm has a smaller value in the high-frequency region and the velocity spectral width W has a larger value in the high-frequency region，suggesting a larger mean drop‐ let scale and a wider concentration distribution. In terms of macroscopic parameters，the cloud base and cloud top of the CCP are significantly higher，the cloud layer is thicker，and the distribution of values is more dispersed.（3）In terms of microscopic characteristics，the raindrop spectra of the two types of cloud-precipitation are different with altitude：the concentration of small raindrops in the CCP increases and then decreases with de‐ creasing altitude due to the melting of ice-phase particles and raindrops merging，whereas that in the WCP fluctuates due to the effects of evaporation，merging，water vapor transport，and updraft lifting altitude. The mediumand large-sized raindrop concentrations of both types of cloud-precipitation increase with decreasing altitude on the whole. In terms of the differences in raindrop concentrations at different heights，above 455 m，the concentration of raindrops of all grain sizes in WCP is almost lower than that in CCP；below 455 m，the concentration of small and large raindrops in WCP is higher than that in CCP，and the concentration of medium raindrops is low‐ er.（4）Comparison of the raindrop spectra under different precipitation intensities showed that when the precipitation is weak，the WCP had lower concentrations of raindrops of all particle sizes than the CCP，but when the precipitation reached a certain intensity（rainfall intensity R≥5 mm·h-1），the WCP produced more small rain‐ drops and a small number of larger raindrops. The few extreme values of Z，LDR，Vm and W of WCP are larger than those of CCP at altitudes below 3 km due to the synergistic effect of low-altitude rapids and topographic up‐ lift in the region，which makes the small WCP raindrops repeatedly touch and form medium-to-large raindrops in the re-uplift airflow.