六盘山区冬季典型降水过程碘化银扩散研究

Study on silver iodide diffusion during typical precipitation process in winter in Liupan Mountain

文章针对人工影响天气地面碘化银发生器作业技术研究需求,使用微波辐射计、激光云高仪等地面观测资料分析了六盘山冬季一次典型降水过程。结合观测数据,利用高斯点源扩散模型对位于六盘山顶部的地面碘化银发生器生成催化剂扩散范围进行了模拟。本次降水过程人工作业装置直接安装于降水云团中,温度在-13~-6℃,上空1 km处温度能达到-26℃;碘化银催化剂有效密度为10^(3)个/m^(3),水平扩散范围达到40 km,垂直扩散范围可达10 km;碘化银催化剂能够进入降水云团-25~-15℃作业窗口高度,并达到有效密度以上,为六盘山冬季地面碘化银发生器人工影响天气作业提供了技术支撑。

In response to the research requirements of the operation technology of ground silver iodide generator to artificially affect weather,a typical winter precipitation process in Liupan Mountain was analyzed by using ground observation data such as microwave radiometer and laser altimeter.Based on the observation data,the diffusion range of catalyst generated by ground silver iodide generator located at the top of Liupan Mountain was simulated by using Gaussian point source diffusion model.The artificial impact operation device during this precipitation process is directly located in the precipitation cloud cluster,with a temperature of-13℃to-6℃.The temperature at a distance of 1 km above can reach-26℃.The effective density of the catalyst is 10^(3) pieces per square meter,with a horizontal diffusion range is up to 40 km and a vertical diffusion range is up to 8 km.The silver iodide catalyst can enter the precipitation cloud cluster at a height of-25℃to-15℃and reach an effective density above,providing technical support for the weather modification operation of the silver iodide generator on the ground in winter in Liupan Mountain.