中国东部表面臭氧污染模式的演变及其与不同强度的热浪的关系
Lili Wang1, Xingchuan Yang1, Junwu Dong1
1College of Resource Environment and Tourism, Capital Normal University, Beijing, 100048, China.
Environmental pollution (Barking, Essex : 1987)
|October 12, 2023
概括
中国东部气温上升与臭氧污染的增加有关,尤其是在热浪期间. 这一趋势表明,需要在夏季对臭氧前体进行更严格的控制,以减轻空气质量影响.
科学领域:
- 大气化学 大气化学
- 气候科学 气候科学
- 环境监测 环境监测
背景情况:
- 由于气候变暖,中国东部面临气温上升的风险.
- 这种变暖趋势与臭氧污染的显著增加有关.
研究的目的:
- 分析中国东部臭氧水平和温度的时空模式.
- 研究臭氧污染与温度之间的关系,特别是在热浪期间.
主要方法:
- 利用来自418个监测站的臭氧数据和ERA5温度数据 (2015-2022年).
- 分析了夏季最高气温,年度臭氧度和热浪频率的趋势.
- 检查了每日最大8小时平均臭氧 (MDA8 O3) 和温度之间的相关性.
主要成果:
- 观测到的夏季最高气温 (每年10%) 和年度臭氧度 (2.84μg/m3 yr-1) 显著增加.
- 臭氧污染季节正在延长,春季和秋季的度增加.
- 热浪显著加剧了臭氧污染,热浪期间的臭氧增加率更高 (9.31 μg/m3 yr-1),而不是热浪时期 (4.01 μg/m3 yr-1).
- 在6月至7月至8月期间,MDA8 O3度与温度之间发现了强烈的相关性 (0.99).
结论:
- 温度是中国东部臭氧形成的关键因素.
- 频繁的夏季热浪加剧了臭氧污染.
- 在热浪期间,对臭氧前体采取更严格的控制措施是必要的.
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