A model assessment of the relationship between urban greening and ozone air quality in China: a study of three metropolitan regions

IF 8.5 1区地球科学 Q1 METEOROLOGY & ATMOSPHERIC SCIENCES

npj Climate and Atmospheric Science Pub Date : 2025-05-16 DOI:10.1038/s41612-025-01054-4

Jiawei Xu, Ben Silver, Rong Tang, Nan Wang, Xin Huang, Aijun Ding, Steve R. Arnold

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Abstract

The impact of biogenic emissions on ozone (O₃) has significant implications for air quality management. We analyze biogenic volatile organic compound (BVOC) emissions resulting from urban greening in three major Chinese cities, and impacts on tropospheric ozone. Urban greening BVOCs contributed 1.9 ppb (2.5%), 1.9 ppb (3.3%), and 3.6 ppb (5.9%) to O₃ formation in Beijing, Shanghai, and Guangzhou, respectively. Temperature-driven enhancement in urban BVOCs produces significantly enhanced O₃ on hot days. Guangzhou shows the highest summer temperatures, and the impact of the BVOC isoprene on O₃ is more significant. The urban BVOC contribution to O₃ is concentrated downwind of each city, due to transport processes. Estimated O₃-related mortality in the cities was 900–2000 people during summertime, with 6–14% of the O₃-related deaths attributable to urban BVOC emissions. The potential contribution of urban isoprene-emitting vegetation to air quality should be considered alongside the potential benefits of urban greening in future policy-making decisions.

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中国城市绿化与臭氧空气质量关系的模型评价——以三个大都市区为例

生物源性排放对臭氧（O3）的影响对空气质量管理具有重要意义。本文分析了中国三个主要城市绿化过程中生物源性挥发性有机化合物（BVOC）的排放及其对对流层臭氧的影响。北京、上海和广州城市绿化BVOCs对O3形成的贡献率分别为1.9 ppb（2.5%）、1.9 ppb（3.3%）和3.6 ppb（5.9%）。温度驱动的城市BVOCs增强在炎热天气导致O3显著增强。广州夏季气温最高，BVOC异戊二烯对O3的影响更为显著。由于交通过程，城市BVOC对O3的贡献集中在每个城市的下风处。夏季城市中与臭氧有关的死亡人数估计为900-2000人，其中6-14%与臭氧有关的死亡可归因于城市中挥发性有机化合物的排放。在未来的决策中，应考虑城市异戊二烯排放植被对空气质量的潜在贡献以及城市绿化的潜在效益。

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来源期刊

npj Climate and Atmospheric Science Earth and Planetary Sciences-Atmospheric Science

CiteScore

8.80

自引率

3.30%

发文量

审稿时长

21 weeks

期刊介绍： npj Climate and Atmospheric Science is an open-access journal encompassing the relevant physical, chemical, and biological aspects of atmospheric and climate science. The journal places particular emphasis on regional studies that unveil new insights into specific localities, including examinations of local atmospheric composition, such as aerosols. The range of topics covered by the journal includes climate dynamics, climate variability, weather and climate prediction, climate change, ocean dynamics, weather extremes, air pollution, atmospheric chemistry (including aerosols), the hydrological cycle, and atmosphere–ocean and atmosphere–land interactions. The journal welcomes studies employing a diverse array of methods, including numerical and statistical modeling, the development and application of in situ observational techniques, remote sensing, and the development or evaluation of new reanalyses.