短期暴露于细颗粒物和臭氧:源影响和可归因的死亡率
Song Liu1,2, Xicheng Li1, Jing Wei3
1School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Environmental science & technology
|June 17, 2024
概括
全球空气污染的细颗粒物 (PM2.5) 和臭氧 (O3) 每年造成数百万人的死亡. 针对特定行业和地区的有针对性的排放控制,考虑到季节性和自然影响,对于减轻健康影响至关重要.
科学领域:
- 环境健康科学 环境健康科学
- 大气化学和物理大气化学和物理
- 流行病学 流行病学
背景情况:
- 短期暴露于细颗粒物 (PM2.5) 和臭氧 (O3) 对全球健康构成重大风险.
- 了解区域和来源对空气污染相关死亡率的具体贡献,对于有效的缓解策略至关重要.
- 现有的研究往往缺乏各种行业的前体排放与它们所造成的健康负担之间的详细联系.
研究的目的:
- 量化可归因于短期暴露于PM2.5和O3.5的全球健康负担 (死亡率).
- 隔离和评估PM2.5和O3前体 (NOx和VOC) 的个人人为和自然排放源的影响.
- 为开发有针对性的,时间动态的排放控制和健康管理策略提供数据驱动的见解.
主要方法:
- 利用机器学习模型估计人口每日暴露于PM2.5和O3.
- 采用化学运输模型来模拟特定部门 (例如运输,能源,工业,火灾) 排放的影响.
- 基于估计的暴露和部门排放贡献的PM2.5和O3的量化可归因死亡率.
主要成果:
- 在2019年,PM2.5和O3暴露导致了全球估计的713.5和496.3千例死亡,分别.
- 来自运输,能源和工业的与燃料相关的NOx排放占这些死亡人数的12.5%.
- 观察到部门影响的季节性和区域性差异,热浪期间的火源排放和生物源的VOCs有显著的贡献,特别是在脆弱的地区.
结论:
- 该研究强调,迫切需要临时动态和针对部门的排放控制策略,以减少空气污染对健康的负担.
- 考虑到季节性和气候影响,解决人为和自然排放源对于有效的公共卫生干预至关重要.
- 研究结果支持制定量身定制的战略,例如将重点从冬季的运输转移到东亚夏季的工业,以及在城市规划中管理生物源的VOC.
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