| Title: | Emissions of biogenic volatile organic compounds from urban green spaces in the six core districts of Beijing based on a new satellite dataset |
| Author(s): | Li X; Chen W; Zhang H; Xue T; Zhong Y; Qi M; Shen X; Yao Z; |
| Address: | "School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China. School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China. Institute of Reproductive and Child Health / Ministry of Health Key Laboratory of Reproductive Health and Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Centre, Beijing, 100191, China. School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China. Electronic address: yaozhl@th.btbu.edu.cn" |
| DOI: | 10.1016/j.envpol.2022.119672 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "Urban green spaces (UGSs) are often positively associated with the health of urban residents. However, UGSs may also have adverse health effects by releasing biogenic volatile organic compounds (BVOCs) and increasing the ambient concentrations of ozone (O(3)) and secondary organic aerosols in urban areas. BVOC emissions from UGSs might be underestimated because of the lack of consideration of the UGS land-use type in urban areas. As such, in this study, we used a newly released satellite dataset, Sentinel-2, with a resolution of 10 m, to derive the classification distribution of UGSs and predict the UGS emissions of BVOCs in Beijing in 2019. The results showed that the annual emissions of BVOCs from UGSs were approximately 2.9 Gg C (95% confidence interval (CI): 2.4-3.3) in the six core districts, accounting for approximately 39% of the total UGS emissions in Beijing. Compared with the results based on Sentinel-2, the BVOC emissions might be underestimated by approximately 37% (95% CI: 11-63) using the commonly used satellite dataset. UGSs produced the highest BVOC emissions in summer (from June to August), accounting for 75.2% of the annual emissions. UGSs contributed the most to the O(3) formation potential in summer, accounting for 41.5% of the total. We could attribute a considerable amount of the O(3) concentration (27.0 mug m(-3), 95% CI: 21.4-32.6) to the UGS BVOCs produced in the core districts of Beijing in July. The new BVOC emissions dataset based on Sentinel-2 vegetation information facilitates modeling studies on the formation of surface O(3) in urban areas and assessments of the impact of UGSs on public health" |
| Keywords: | "*Air Pollutants/analysis Beijing *Ozone/analysis Parks, Recreational *Volatile Organic Compounds/analysis Biogenic emissions Leaf area index Sentinel-2 Surface ozone Urban green spaces;" |
| Notes: | "MedlineLi, Xin Chen, Wenjing Zhang, Hanyu Xue, Tao Zhong, Yuanwei Qi, Min Shen, Xianbao Yao, Zhiliang eng England 2022/06/29 Environ Pollut. 2022 Sep 1; 308:119672. doi: 10.1016/j.envpol.2022.119672. Epub 2022 Jun 25" |
