Study on the spatial and temporal distribution patterns and exposure risks of PM2.5 pollution in Beijing-Tianjin-Hebei Region
To mitigate the severe PM2.5 pollution in Beijing,Tianjin and Hebei region,the kilome-ter-level high-resolution PM2.5 dataset is used to analyze the spatial and temporal distribution pat-terns of PM2.5 in the Beijing-Tianjin-Hebei Region,with the frequency of exceedance method and population relative exposure risk model used to assess the regional exposure risk and population exposure risk in Beijing,Tianjin and Hebei region.This study also predicts the future population exposure risk.The results illustrate that the PM2.5 concentration in Beijing-Tianjin-Hebei region showes a fluctuating increasing trend between 2001 and 2013,and a significant decreasing trend between 2014 and 2020,decreasing to 38.43 μg/m3 by 2020.The PM2.5 concentration in the southeastern part of Beijing-Tianjin-Hebei is larger than that in the northwestern part.For re-gional exposure risk,it is lower in Chengde and Zhangjiakou,and higher in Handan,Hengshui,Langfang,Shijiazhuang and Xingtai.For population exposure risk,it is lower in Chengde,Zhangjiakou and Qinhuangdao,and higher in Beijing,Handan,Tianjin,Langfang,Xingtai and Shijiazhuang.Overall,Chengde and Zhangjiakou have the lowest exposure risk,while Handan,Langfang,Xingtai and Shijiazhuang have the highest exposure risk.The population exposure risk in Beijing-Tianjin-Hebei Region will be low(Level 0)in 2030,2035 and 2060.This study com-bines regional exposure risk and population exposure risk to avoid the errors caused by a single e-valuation index and to obtain a more accurate understanding of exposure risk.
Beijing-Tianjin-Hebei RegionPM2.5spatial and temporal distribution patternre-gional exposure riskpopulation exposure risk
国家科技期刊平台
NSTL
万方数据
