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Health Benefits and Scenario Projections of PM2.5 and O3 Pollution in Beijing-Tianjin-Hebei,China 认领 引用 被引量：1
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作者 WANG Yucong ZHAO Yingfan +7 位作者 XU Ruiguang PEI Boni WANG Hongyu WANG Litao WANG Qing LIU Jingyun CHEN Weiwei SONG Kai 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第4期685-701,共17页
Fine particulate matter(PM2.5)and ozone(O3)have emerged as major air pollutants in China,posing risks to human health.In this paper,Beijing-Tianjin-Hebei,a key region for air pollution prevention and control in ... Fine particulate matter(PM2.5)and ozone(O3)have emerged as major air pollutants in China,posing risks to human health.In this paper,Beijing-Tianjin-Hebei,a key region for air pollution prevention and control in China,was selected as the study area to analyze the characteristics of PM2.5and O3 concentration changes and their health effects from 2014 to 2023,and to estimate the potential health benefits of realizing different emission reduction standards in 2030.The results have shown that:1)The annual average PM2.5concentration in Beijing-Tianjin-Hebei showed a decreasing trend from 2014 to 2023,while the daily maximum 8-h sliding average of O3(O3-8h concentration)showed a fluctuating increasing trend.2)The number of premature deaths and economic losses attributed to PM2.5pollution showed a decreasing trend,while the changes in the number of premature deaths and economic losses attributed to O3 pollution showed an opposite trend,in which the health risks and economic losses in Beijing and Tianjin were relatively prominent.3)If the annual average concentrations of PM2.5and O3 in 2030 reach the limits of the secondary standards of Ambient Air Quality Standards(GB 3095–2012),the number of premature deaths attributed to PM2.5and O3 in Beijing-Tianjin-Hebei will decrease by 23.08%and20.45%,respectively,compared with that in 2023,and with the increase of per capita disposable income year by year,the health and economic losses will be reduced by 41.23×108 yuan(RMB)(95%CI:33.71×108–48.72×108 yuan)and 98.89×108 yuan(95%CI:54.14×108–142.67×108yuan),respectively;the increase in the number of premature deaths can be further avoided and significant economic benefits can be realized if the concentrations of PM2.5and O3 are further reduced to higher standards.The study shows that the PM2.5control in Beijing-Tianjin-Hebei has been effective,but the O3 pollution problem is emphasized,and the number of health deaths and economic losses caused by it are on the rise,and higher target air quality standards should be set in order to effectively improve the health of residents and bring significant economic benefits. 展开更多
关键词 Beijing-Tianjin-Hebei PM2.5 O3 health benefits scenario projections Beijing-Tianjin-Hebei China
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Enhanced nitrous acid(HONO)formation via NO2uptake and its potential contribution to heavy haze formation during wintertime 认领 引用 被引量：3
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作者 Zirui Liu Rong Yang +6 位作者 Jingyun Liu Keding Lu Guiqian Tang Yuepeng Pan Dongsheng Ji Yuesi Wang Bo Hu 《Atmospheric and Oceanic Science Letters》 CSCD 2024年第6期15-20,共6页
full understanding of the sources of atmospheric nitrous acid(HONO)in the polluted urban atmosphere re-mains a challenge.In this study,ambient HONO and relevant species were measured during January 2019 at an urban si... full understanding of the sources of atmospheric nitrous acid(HONO)in the polluted urban atmosphere re-mains a challenge.In this study,ambient HONO and relevant species were measured during January 2019 at an urban site in Beijing,China,and a budget analysis of HONO was conducted using a box model combined with field observations.Large nighttime“missing sources”of HONO were identified on heavily polluted days based on traditional sources,which had a significant correlation with the relative humidity,ammonia(NH3),and aerosol surface area,and the promotional effect of NH3for nitrogen dioxide(NO2)uptake on the wet aerosol surface was discussed.Then,an updated parameterization scheme for quantifying the enhanced heterogeneous reactions of NO2on aerosol surfaces is proposed,and the missing nighttime sources of HONO could be substantially com-pensated after the new scheme was incorporated.Further evaluation on the contributions of HONO to hydroxyl radicals was conducted,and the authors found that the photolysis of HONO played a dominant role in the primary OH production on the polluted days(78%-90%).The study reveals great potential of an NH3-enhanced uptake coefficient of NO2on the aerosol surface in the nocturnal HONO budget,and highlights the significance of HONO in the strong atmospheric oxidation capability during episodes with a heavily polluted atmosphere. 展开更多
关键词 Nitrous acid Budget analysis Heterogeneous reactions of NO2 Heavy pollution episodes Atmospheric oxidation capacity
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