2023年加拿大大火灾的长距离PM2.5污染和健康影响
Qiang Zhang1, Yuexuanzi Wang2, Qingyang Xiao3
1Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China. qiangzhang@tsinghua.edu.cn.
Nature
|September 10, 2025
概括
2023年加拿大极端野火造成了广泛的空气质量问题,增加了全球颗粒物 (PM2.5) 暴露. 这种污染导致北美和欧洲成千上万的暴露和死亡.
科学领域:
- 环境科学
- 公共卫生
- 大气化学
背景情况:
- 2023年加拿大的极端野火对许多地区的空气质量产生了重大影响.
- 野火烟雾中的颗粒物 (PM2.5) 对人类健康构成重大威胁.
研究的目的:
- 量化2023年加拿大野火造成的全球和区域PM2.5暴露.
- 评估相关的人类健康影响,包括急性和慢性死亡率.
主要方法:
- 使用卫星观测来监测烟雾.
- 使用机器学习算法进行暴露评估.
- 应用化学运输模型来模拟PM2.5的分散和冲击.
主要成果:
- 全球每年的PM2.5暴露增加了0.17μg/m3,北美增幅最大 (1.08μg/m3).
- 加拿大的野火烟雾对美国的PM2.5水平做出了重大贡献,超过了国内野火的贡献.
- 据估计,北美和欧洲约有3.54亿人接触过该病毒,其中有5,400人死于急性感染,另有64,300人死于慢性感染.
结论:
- 2023年加拿大的野火表明了PM2.5污染的广泛影响及其严重的健康后果.
- 野火造成的空气污染对公共卫生构成重大负担,具有跨境影响.
- 迫切需要采取策略来减轻大规模野火对健康的影响.
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