空间科学学报2025，Vol.45Issue(3)：729-735,7.DOI:10.11728/cjss2025.03.2024-0046
基于中高层大气激光雷达的汤加火山灰探测
Detection of Tonga Volcanic Ash Using Middle and Upper Atmospheric Lidar
摘要
Abstract
This study presents the first report of detecting Tonga volcanic ash over Wuhan(30.5°N,114.3°E)using a middle and upper atmospheric lidar system.The research analyzes the intensity varia-tions of Tonga volcanic ash as it spread over Wuhan from March to July 2022,and also examines the volcanic ash's Ångström exponent.The findings reveal that from 8 March to 7 April 2022,the detected volcanic ash signals were relatively weak.However,starting on 10 April 2022,the lidar detected a sud-den increase in the strength of the volcanic ash return signals,which remained consistently strong be-tween altitudes of 20～25 km over the following months.This phenomenon suggests a significant change in the volcanic ash's propagation during this period,which may be closely related to atmospheric flow patterns.Further analysis of the detected volcanic ash heights revealed an uneven,layered structure in the stratosphere,indicating a distinct distribution of volcanic ash at different altitudes.This provides important insights into the mechanisms of volcanic ash propagation in the atmosphere and its environ-mental impact.Additionally,the lidar data analysis from April to July 2022 shows a weak correlation between the detected volcanic ash altitude and the particle size.This suggests that the movement and settling behavior of volcanic ash particles are likely influenced by various complex factors,rather than being governed solely by their size.关键词
激光雷达/汤加火山灰/气溶胶/大气观测Key words
Lidar/Tonga volcanic ash/Aerosol/Atmospheric observation分类
天文与地球科学引用本文复制引用
汪为,王积勤,季凯俊,程学武,林鑫,杨勇,李发泉..基于中高层大气激光雷达的汤加火山灰探测[J].空间科学学报,2025,45(3):729-735,7.基金项目
国家自然科学基金项目(42305152)和科技部重点研发计划项目(2022YFC2807201)共同资助 （42305152）
