摘要
对 Anderson分级采样器采集的 PM1 0 进行了谱特征的分析 ,研究了 PM2 .5在 PM1 0 中所占的比例 ,并从实测的大气气溶胶光学厚度资料出发 ,应用消光法反演了兰州城市冬季大气柱气溶胶粒子谱 .结果表明 :低层大气和整层大气的气溶胶粒子数密度谱分布都具有 3峰型特征 .兰州城市冬季的大气污染主要是由于燃煤和汽车尾气造成的 。
The characteristics of size distributions of PM 10 ,which were collected by Anderson cascade,are analyzed.The proportions of PM 2.5 over PM 10 are investigated.The measured data of the aerosol optical depths are used to invert the columnar aerosol size distributions in Lanzhou City in winter by inversion method.The results show that the aerosol size distributions of lower layer atmosphere and total layer atmosphere are all characterized by three modes,with the conclusion that air pollution in Lanzhou City in winter is mainly caused by coal combustion and tail gas from cars and sometimes by dust,too.
出处
《兰州大学学报(自然科学版)》
CAS
CSCD
北大核心
2003年第4期104-108,共5页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金资助项目 ( 4 9875 0 2 7)