在低碳未来的不同排放控制策略下的南加州臭氧暴露差异
Yusheng Zhao1, Yin Li2, Yiting Li1
1Department of Land, Air, and Water Resource, University of California, Davis, CA 95616, USA.
The Science of the total environment
|January 18, 2025
概括
传统的臭氧 (O3) 空气污染控制措施可能会加剧,而不是改善洛杉矶黑人和非洲居民的空气质量差异. 在区域范围内减少排放可能是实现空气质量标准和环境正义的关键.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 公共卫生 公共卫生
背景情况:
- 环境正义 (EJ) 对于制定有效的空气污染控制战略越来越重要.
- 传统的臭氧 (O3) 控制策略往往忽视了对暴露差异的影响.
- 南加州面临着臭氧和氧化 (NOx) 污染的重大挑战.
研究的目的:
- 分析2050年传统O3控制策略对南加州O3和NOx暴露差异的影响.
- 评估这些战略如何影响不同的人口群体,特别是在城市核心地区.
- 找出潜在的解决方案,在空气质量改善的同时,减轻暴露差异.
主要方法:
- 在五个排放场景下,使用化学运输模型模拟未来的空气质量.
- 采用了一种新的O3来源分配技术,以准前体排放.
- 分析的暴露差异,定义为与人口平均暴露的偏差.
主要成果:
- 传统的O3控制策略显示O3暴露差异的最小减少 (<1.6%) 和NO2暴露差异的<9%.
- 洛杉矶的黑人和非洲居民经历了增加的NO2暴露差异 (+23.1%至+66.2%) 和O3差异 (-3.3%至+0.1%).
- 消除洛杉矶国际机场 (LAX) 的NOx排放量可以将NO2差距减少多达50%,但目前是不切实际的.
结论:
- 传统的O3控制策略不足以减少NOx丰富的城市核心中的O3和NO2暴露差异.
- 目前的战略可能会加剧现有的环境不公正,特别是对少数群体.
- 区域减排战略被提议作为一个潜在的解决方案,同时解决空气质量和欧洲日的目标.
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