Deciphering decadal urban ozone trends from historical records since 1980.

IF 16.3 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES National Science Review Pub Date : 2024-10-24 eCollection Date: 2024-11-01 DOI:10.1093/nsr/nwae369
Haolin Wang, Xiao Lu, Paul I Palmer, Lin Zhang, Keding Lu, Ke Li, Tatsuya Nagashima, Ja-Ho Koo, Hiroshi Tanimoto, Haichao Wang, Meng Gao, Cheng He, Kai Wu, Shaojia Fan, Yuanhang Zhang
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Abstract

Ozone pollution is a major environmental threat to human health. Timely assessment of ozone trends is crucial for informing environmental policy. Here we show that for the most recent decade (2013-2022) in the northern hemisphere, warm-season (April-September) mean daily 8-h average maximum ozone increases much faster in urban regions with top ozone levels (mainly in the North China Plain, 1.2 ± 1.3 ppbv year-1) than in other, low-ozone regions (0.2 ± 0.9 ppbv year-1). These trends widen the ozone differences across urban regions, and increase extreme pollution levels and health threats from a global perspective. Comparison of historical trends in different urban regions reveals that ozone increases in China during 2013-2022 differ in magnitude and mechanisms to historical periods in other regions since 1980. This reflects a unique chemical environment characterized by exceptionally high nitrogen oxides and aerosol concentrations, where reducing ozone precursor emissions leads to substantial ozone increase. Ozone increase in China has slowed down in 2018-2022 compared to 2013-2017, driven by ongoing emission reductions, but with ozone-favorable weather conditions. Historical ozone evolution in Japan and South Korea indicates that ozone increases should be suppressed with continuous emission reduction. Increasing temperature and associated wildfires have also reversed ozone decreases in the USA and Europe, with anthropogenic ozone control slowing down in recent decades.

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从 1980 年以来的历史记录中解读城市臭氧的十年趋势。
臭氧污染是对人类健康的一大环境威胁。及时评估臭氧趋势对于制定环境政策至关重要。我们在此表明,在北半球最近十年(2013-2022 年)中,暖季(4 月至 9 月)臭氧水平最高的城市地区(主要在华北平原,1.2 ± 1.3 ppbv year-1)的臭氧日均最大值(8 小时)比其他臭氧水平低的地区(0.2 ± 0.9 ppbv year-1)增加得更快。这些趋势扩大了城市地区之间的臭氧差异,并从全球角度增加了极端污染水平和健康威胁。对比不同城市地区的历史趋势可以发现,2013-2022 年期间中国臭氧的增加幅度和机制与 1980 年以来其他地区的历史时期有所不同。这反映了一种独特的化学环境,其特点是氮氧化物和气溶胶浓度极高,减少臭氧前体排放会导致臭氧大幅增加。与 2013-2017 年相比,2018-2022 年中国的臭氧增加速度有所放缓,原因是持续减排,但天气条件有利于臭氧。日本和韩国历史上的臭氧演变表明,持续减排应能抑制臭氧增加。气温升高和与之相关的野火也逆转了美国和欧洲的臭氧下降趋势,近几十年来人为的臭氧控制正在放缓。
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来源期刊
National Science Review
National Science Review MULTIDISCIPLINARY SCIENCES-
CiteScore
24.10
自引率
1.90%
发文量
249
审稿时长
13 weeks
期刊介绍: National Science Review (NSR; ISSN abbreviation: Natl. Sci. Rev.) is an English-language peer-reviewed multidisciplinary open-access scientific journal published by Oxford University Press under the auspices of the Chinese Academy of Sciences.According to Journal Citation Reports, its 2021 impact factor was 23.178. National Science Review publishes both review articles and perspectives as well as original research in the form of brief communications and research articles.
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