大气与环境光学学报2025，Vol.20Issue(3)：367-384,18.DOI:10.3969/j.issn.1673-6141.2025.03.010
卷云空心冰晶后向散射特性仿真
Simulation of backscattering properties of hollow ice crystals in cirrus clouds
摘要
Abstract
Cirrus clouds,typically found at altitudes above 6 km,consist of non-spherical ice crystals and play a crucial role in the earth's radiation balance.Previous in-situ observation experiments have revealed a significant presence of hollow ice crystals in cirrus clouds.However,due to the absence of appropriate forward model,the existence of these hollow ice crystals is often overlooked in lidar observation studies.Based on prior in-situ observations,this paper establishes an empirical relationship between the hollowness and the length of hollow ice crystals,addressing the limitations of the fixed hollowness assumption used in previous hollow ice crystal models.The derivation of the physical optics approximation method based on beam-splitting and the calculation process for the backscattering properties of hollow ice crystals are introduced in detail.The simulation results show that both the wavelength depolarization ratio and the color ratio of ice crystals at 532 nm and 1064 nm are dependent on crystal size,and especially,the color ratio of ice crystal dooecreases monotonically with the increase of crystal size.关键词
卷云/冰晶/非球形粒子散射/激光雷达Key words
cirrus cloud/ice crystal/scattering properties of non-spherical particle/lidar分类
大气科学引用本文复制引用
祝宣浩,刘东..卷云空心冰晶后向散射特性仿真[J].大气与环境光学学报,2025,20(3):367-384,18.基金项目
安徽省自然科学基金资助项目(2208085UQ01),合肥研究院院长基金拔尖人才培育项目(BJPY2021A03) （2208085UQ01）
