摘要
雾霾天气可吸入颗粒物的浓度增加,受大气温度、气压以及风速的影响扩散到距离不同的区域中。在空气污染影响身体健康和生活的基础上,研究雾霾天气下颗粒物浓度分布特征。采集雾霾天气时的自然环境数据,转换辐射强度反演雾霾天气大气温度与气压;根据反演结果计算大气中的颗粒物质量浓度和沉降速率,利用二者的乘积估算大气颗粒物干沉降通量,结合入射电场和入射磁场等物理量参数,获取雾霾粒子散射规律;利用改进后的大气扩散模型确定颗粒物活动轨迹,通过转换坐标实现对颗粒物浓度分布特征的提取。实验结果表明,大气温度与颗粒物的浓度分布呈弱相关,气压以及风速与颗粒物的浓度分布呈强相关性,其中冶铁工厂C周围的颗粒物,其浓度分布在第8h分布范围最广,在第12 h~18 h分布范围逐渐缩小。
In haze weather,the concentration of inhalable particulate matter increases and diffuses to different areas under the influence of atmospheric temperature,air pressure and wind speed.Based on the impact of air pollution on health and life,the distribution characteristics of particulate matter concentration in haze weather were studied.This paper collected the natural environment data in haze weather,converted the radiation intensity and retrieved the atmospheric temperature and pressure in haze weather.According to the inversion results,the mass concentration and deposition rate of particulate matter in the atmosphere are calculated,the dry deposition flux of atmospheric particulate matter is estimated by the product of them,and the scattering law of haze particles is obtained by combining the physical parameters such as incident electric field and incident magnetic field.The improved atmospheric diffusion model is used to determine the trajectory of particle activity,and the characteristics of particle concentration distribution are extracted by transforming coordinates.The experimental results show that there is a weak correlation between atmospheric temperature and particle concentration distribution.There is a strong correlation between air pressure and wind speed and particle concentration distribution.Among the particles around iron smelting plant C,the concentration distribution range is the widest in the 8th hour,and gradually decreases in the 12th-18th hour.
作者
陈桂琴
Chen Guiqin(Zhongxian Meteorological Bureau, Chongqing 404300, China)
出处
《环境科学与管理》
CAS
2022年第6期134-139,共6页
Environmental Science and Management
关键词
雾霾天气
颗粒物
浓度特征
分布特征
干沉降通量
haze weather
particulate matter
concentration characteristics
distribution characteristics
dry deposition flux
