一次稳定天气系统下气溶胶沉降过程分析
Analysis of Aerosol Deposition Process under a Stable Weather System
张嘉霖 1刘东2
作者信息
- 1. 成都信息工程大学大气科学系,四川成都610225
- 2. 中国科学院安徽光学精密仪器研究所,安徽合肥230031
- 折叠
摘要
选取天津地区春末夏初一次空气污染过程,利用安徽光机所研制的Mie散射激光雷达探测资料,结合微波辐射计、地面气象观测数据对天津地区大气气溶胶垂直分布情况进行了研究,并对当时的气象条件及大气边界层逆温特征进行了分析.结果表明,大气气溶胶的沉降过程与能见度的变化具有一定的相关性,在一次连续的观测过程中监测到大气气溶胶随时间有一个明显的沉降过程.气溶胶层层顶下降1 km,当日能见度在相同时段里明显降低,说明气溶胶的沉降对能见度产生了一定的影响.由于逆温层Ⅰ的存在抑制了大气的垂直运动,逆温层Ⅱ异常稳定,在较长的时间内未发生明显的变化.天津地区此次空气污染过程中污染物主要为外源性输送.
Abstract
Aiming at the air pollution process at the end of spring and the beginning of summer in Tianjin,the vertical distribution of atmospheric aerosols in Tianjin was studied by using Mie scattering lidar detection data developed by Anhui Institute of Optical Precision Instrument combined with microwave radiometer,ground meteorological observation data,the meteorological conditions and the characteristics of the atmospheric boundary layer inversion were analyzed.The results showed that the deposition process of atmospheric aerosol has a certain correlation with the change of visibility.In the process of a continuous observation,there is an obvious settlement process of atmospheric aerosol over time.The top layer of atmospheric aerosol decreased by 1 km,there is significant reduction of visibility at the same time.Due to the vertical movement of atmosphere was suppressed by inversion layer Ⅰ and stable of inversion layer Ⅱ,there was no obvious change in a long time.The main pollutants were exogenous transport in the air pollution process.
关键词
激光雷达/气溶胶/沉降/能见度/逆温Key words
Laser radar/Aerosol/Sedimentation/Visibility/Temperature inversion引用本文复制引用
基金项目
环保行业专项(201409001)
国家科技支撑项目(2014BAC23B01)
天津市重大科技专项(14ZCDGSF00027)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据