摘要
2021年1月1-2日,宣城市出现特定时段细颗粒物(PM;)浓度突然升高、短时间内又快速下降的特殊污染现象。通过对比分析不同空间尺度范围内监测数据的关联变化,并利用空气质量模型模拟污染过程进行研究,结果表明:研究区域位于一个天气尺度的污染气团西南边界地带,随气团推移运行,该区域反复进入和偏离污染区,是PM;浓度出现快速升高和下降特征的主要原因。同时,研究区域PM;峰值出现的时间符合2020年12月以来PM;日变化的一般规律,但是PM;浓度变化幅度差异显著。因此,这是一次较为特殊的PM;污染过程。在PM;浓度峰值时段遭遇外部污染气团过境,是PM;浓度短时变化幅度大的原因,这说明了该区域细颗粒物污染成因复杂,为科学制定相应防治措施提供了理论依据。
On January 1-2,2021,a special pollution phenomenon of sudden fluctuation in fine particulate matter(PM;)concentration occurred in Xuancheng City. The authors analyze the changes of monitoring data in different spaces and simulate the pollution process with air quality models. The results show that the study area,located in the southwest boundary of a synoptic scale polluted air mass,comes in and out of the pollution zone several times as the air mass moving,which is the main reason for the rapid changes of PM;concentrations. The peak time of PM;in the study area is consistent with the pattern of daily variation of PM;since December 2020,but the magnitude of PM;concentration varies significantly. It’s concluded that,this is a relatively specific PM;pollution process. The encounter of polluted air mass transit during the peak time of PM;concentration is the reason for the sudden fluctuation of PM;concentration,which illustrates the complex causes of fine particulate pollution in the region,and provides a theoretical basis for scientific pollution prevention and control.
作者
余灏
黄雪梅
易明建
YU Hao;HUANG Xuemei;YI Mingjian(Anhui Provincial Academy of Environmental Sciences,Hefei 230071,China;School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei 230601,China)
出处
《安徽建筑大学学报》
2021年第6期20-26,共7页
Journal of Anhui Jianzhu University
基金
国家重点研发计划项目(2018YFC0213806)
安徽省重点研发计划项目(1804a0802196)
安徽建筑大学科研基金项目(2020QDZ31)。
