改善中国臭氧污染的巨大挑战:根据观测数据计算的高区域背景臭氧度
Yusi Liu1, Yang Zhang2, Fan Yang3
1State Key Laboratory of Severe Weather & Key Laboratory for Atmospheric Chemistry of China Meteorology Administration, Chinese Academy of Meteorological Sciences, Beijing, 100081, China.
Environmental pollution (Barking, Essex : 1987)
|March 29, 2025
概括
中国的区域背景臭氧度因地区而异. 平原,北部和西南部季风地区的高水平表明,由于高度和跨境运输等因素,在满足空气质量标准方面存在挑战.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 空气质量监测 空气质量监测
背景情况:
- 区域背景臭氧度对于评估空气质量标准至关重要.
- 了解这些度有助于确定减少排放的需求.
研究的目的:
- 计算和分析中国全国区域背景臭氧度.
- 确定背景臭氧的区域差异和影响因素.
主要方法:
- 2015-2023年利用的每小时臭氧度和风速数据.
- 开发了一个实验方程来确定区域背景臭氧.
- 根据气候和臭氧分布,将中国划分为五个地区.
主要成果:
- 区域背景臭氧在东北部是最低的 (77.3 ± 5.7 μg/m3).
- 在高原 (99.6 ± 4.8 μg/m3),北部 (95.3 ± 7.1 μg/m3) 和西南季风 (94.5 ± 8.0 μg/m3) 地区观察到的度最高.
- 平原的臭氧水平与土壤NOx相关,而高原的水平与高度和平流层入侵有关.
结论:
- 在高原,北部和西南部季风地区的高背景臭氧对满足空气质量标准构成挑战.
- 来自东南亚的跨境运输对中国西南地区的臭氧水平产生了重大影响.
- 背景臭氧的区域差异需要量身定制的减排战略.
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