热带气象学报2025，Vol.41Issue(2)：178-188,11.DOI:10.16032/j.issn.1004-4965.2025.015
粤北冬季气溶胶垂直分布航测研究
Airborne Observation of Wintertime Aerosols Vertical Distributions in Northern Guangdong
摘要
Abstract
From 18 to 20 January 2024,aerial observations of atmospheric aerosol spatial distribution were conducted for the first time in northern Guangdong using a weather modification aircraft,establishing baseline data to assess the region's ecological barrier effectiveness.This study analyzes the vertical distribution characteristics of aerosol number concentration,effective diameter,and particle size distribution in winter in northern Guangdong utilizing the data from two flights(including aerosol,cloud droplet,and comprehensive meteorological observations),wind profile radar data and ERA5 reanalysis data,combined with synoptic weather analysis.The results indicate that during the observation period,under stable and clear weather conditions the aerosol number concentration in the northern Guangdong region reached a maximum of 1 679 cm-3,with a mean value of approximately 1 000 cm-3 below 1 500 m and an average effective diameter of 0.3 μm.The average aerosol size distribution exhibited a bimodal structure,with peaks at 0.14-0.15 μm and 0.20-0.22 μm.The average aerosol size distribution width decreased with altitude,measuring 3 μm below 1 800 m and 1 μm above 1 800 m.The peak concentration of aerosol particle size distribution below 500 m was approximately 140-160 particles·cm-3.Overall,aerosol number concentration decreased with altitude,exhibiting a sharp drop at the top of the boundary layer.The presence of an inversion layer resulted in relatively high concentration zones at multiple altitudes.Long-range transport influenced the variation of aerosol number concentration in the upper atmosphere.From the surface to high altitudes,atmospheric conditions with a relative humidity greater than 80％throughout the entire layer facilitated the hygroscopic growth of soluble aerosol particles during their upward transport.关键词
粤北冬季/气溶胶数浓度/垂直分布/有效直径/飞机观测Key words
Winter in Northern Guangdong/Aerosol number concentration/vertical distribution/effective diameter/aircraft observation分类
大气科学引用本文复制引用
高建秋,李军霞,何松蔚,杜家铭,崔毅,王梧熠,王刚..粤北冬季气溶胶垂直分布航测研究[J].热带气象学报,2025,41(2):178-188,11.基金项目
国家重点研发计划项目(2019YFC1510301) （2019YFC1510301）
风云卫星应用先行计划项目(FY-APP-ZX-2023.02) （FY-APP-ZX-2023.02）
基于飞机观测的广东省层状云微物理特征分析项目(GRMC2022M10) （GRMC2022M10）
广州气象卫星地面站科研课题(2302)共同资助 （2302）
