摘要
利用沈阳地区2010年全年大气总消光系数、气体分子吸收系数、气溶胶吸收和散射系数以及大气可吸入颗粒物数浓度的小时数据,对沈阳地区的大气消光特别是气溶胶消光性质进行了高时间分辨率的研究。结果表明:总消光系数和气溶胶散射系数在一天内呈单周期峰谷型分布,05—06时(北京时间,下同)达到峰值,15时达到谷值。大气总消光系数在雪天最大、霾天次之、晴天最小。气溶胶消光系数与粒子数浓度的相关性随着粒径的减小而增大。
This paper studies the high-temporal-resolution properties of atmospheric extinction, especially aerosol extinction, with the hourly data of relevant factors （including total atmospheric extinction coefficient, absorption coefficient of gas molecule, absorption and scattering coefficients of aerosol, and inhalable particle number concentration） for the year of 2010 in Shenyang area.Results show that the total extinction and aerosol scattering coefficients both show a single cycle pattern with a peak in 05：00-06：00 BST and a valley at 15：00 BST in one day.The total extinction coefficient is the highest in snowy days ,then in hazy days, and it is the lowest in sunny days.The correlation coefficient between the aerosol extinction coefficient and the particle number concentration increases with the decreasing of particle size.
出处
《大气科学学报》
CSCD
北大核心
2015年第4期458-464,共7页
Transactions of Atmospheric Sciences
基金
沈阳大气环境研究所基本科研业务经费项目(2013IAE-CMA05)
气象关键技术集成与应用(面上)项目(CMAGJ2014M12)
公益性行业(气象)科研专项(GYHY201406031)
辽宁省科技攻关项目(2013229031)
关键词
气溶胶
消光系数
散射系数
粒子数浓度
aerosol
extinction coefficient
scattering coefficient
particle number concentration
