Xu Jiawei, Silver Ben, Tang Rong, Wang Nan, Huang Xin, Ding Aijun, Arnold Steve R
School of Atmospheric Sciences, Nanjing University, Nanjing, 210023 China.
Collaborative Innovation Center of Climate Change, Nanjing, Jiangsu Province 210023 China.
NPJ Clim Atmos Sci. 2025;8(1):184. doi: 10.1038/s41612-025-01054-4. Epub 2025 May 16.
The impact of biogenic emissions on ozone (O) 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 O formation in Beijing, Shanghai, and Guangzhou, respectively. Temperature-driven enhancement in urban BVOCs produces significantly enhanced O on hot days. Guangzhou shows the highest summer temperatures, and the impact of the BVOC isoprene on O is more significant. The urban BVOC contribution to O is concentrated downwind of each city, due to transport processes. Estimated O-related mortality in the cities was 900-2000 people during summertime, with 6-14% of the O-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.
生物源排放对臭氧（O）的影响对空气质量管控具有重大意义。我们分析了中国三个主要城市城市绿化产生的生物源挥发性有机化合物（BVOC）排放及其对对流层臭氧的影响。城市绿化产生的BVOCs在北京、上海和广州对O生成的贡献分别为1.9 ppb（2.5%）、1.9 ppb（3.3%）和3.6 ppb（5.9%）。温度驱动的城市BVOCs增加在炎热天气下会使O显著增加。广州夏季气温最高，BVOC异戊二烯对O的影响更为显著。由于传输过程，城市BVOC对O的贡献集中在各城市的下风向。夏季各城市与O相关的估计死亡人数为900 - 2000人，其中6 - 14%的与O相关的死亡可归因于城市BVOC排放。在未来的政策决策中，应在考虑城市绿化潜在益处的同时，兼顾城市异戊二烯排放植被对空气质量的潜在贡献。
