Chao Gao, Xuelei Zhang*, Ling Huang, Hu Yang, Hongmei Zhao, Shichun Zhang and Aijun Xiu,
{"title":"MEGAN和BEIS的模式比较:生物源性VOCs和土壤NO排放对中国夏季臭氧和二次有机气溶胶形成的协同影响","authors":"Chao Gao, Xuelei Zhang*, Ling Huang, Hu Yang, Hongmei Zhao, Shichun Zhang and Aijun Xiu, ","doi":"10.1021/acsestair.5c00038","DOIUrl":null,"url":null,"abstract":"<p >Biogenic volatile organic compounds (BVOCs) and soil nitrogen oxides (NO<sub><i>x</i></sub>) are major natural contributors to ozone (O<sub>3</sub>) and secondary organic aerosol (SOA) formation. While significant progress has been made in reducing anthropogenic emissions in China, surface ozone levels continue to rise, emphasizing the growing importance of biogenic emissions in air quality management. Despite the availability of various biogenic emission models, including MEGAN v3.2 and BEIS v3.6 for BVOCs and YL95 and BDSNP for soil NO, discrepancies in their estimates introduce uncertainties in understanding their combined impacts on ozone formation. Existing studies largely focus on individual contributions of BVOCs or soil NO<sub><i>x</i></sub>, leaving their synergistic effects underexplored in China. Here, we evaluate the individual and combined impacts of BVOC and soil NO<sub><i>x</i></sub> emissions on ozone formation in China using the MEGAN and BEIS models integrated with the Community Multiscale Air Quality (CMAQ) model. Nine sensitivity scenarios were simulated to examine spatial and temporal variations in emissions and their contributions to ozone. Results indicate that MEGAN estimates 1.27 times higher BVOC emissions than BEIS, particularly for isoprene and monoterpenes, while the BDSNP scheme predicts higher soil NO emissions compared to YL95. Combined emissions result in ozone and SOA increases of 10.11%–28.40% and 15.03%–62% across China, with significant regional variability. Synergistic effects amplify ozone formation beyond the additive impacts of individual emission sources, particularly in regions like the North China Plain. Our findings underscore the critical need to incorporate detailed biogenic emissions in air quality models to accurately capture ozone dynamics in China. By identifying the significant contributions of BVOCs and soil NO<sub><i>x</i></sub>, this study provides a robust basis for developing refined emission control strategies. The insights gained advance the broader understanding of natural and anthropogenic interactions in atmospheric chemistry, guiding policy interventions to mitigate ozone pollution effectively.</p>","PeriodicalId":100014,"journal":{"name":"ACS ES&T Air","volume":"2 8","pages":"1538–1551"},"PeriodicalIF":0.0000,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Model Intercomparisons of MEGAN and BEIS: Synergistic Impacts of Biogenic VOCs and Soil NO Emissions on Summer Ozone and Secondary Organic Aerosol Formation in China\",\"authors\":\"Chao Gao, Xuelei Zhang*, Ling Huang, Hu Yang, Hongmei Zhao, Shichun Zhang and Aijun Xiu, \",\"doi\":\"10.1021/acsestair.5c00038\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Biogenic volatile organic compounds (BVOCs) and soil nitrogen oxides (NO<sub><i>x</i></sub>) are major natural contributors to ozone (O<sub>3</sub>) and secondary organic aerosol (SOA) formation. While significant progress has been made in reducing anthropogenic emissions in China, surface ozone levels continue to rise, emphasizing the growing importance of biogenic emissions in air quality management. Despite the availability of various biogenic emission models, including MEGAN v3.2 and BEIS v3.6 for BVOCs and YL95 and BDSNP for soil NO, discrepancies in their estimates introduce uncertainties in understanding their combined impacts on ozone formation. Existing studies largely focus on individual contributions of BVOCs or soil NO<sub><i>x</i></sub>, leaving their synergistic effects underexplored in China. Here, we evaluate the individual and combined impacts of BVOC and soil NO<sub><i>x</i></sub> emissions on ozone formation in China using the MEGAN and BEIS models integrated with the Community Multiscale Air Quality (CMAQ) model. Nine sensitivity scenarios were simulated to examine spatial and temporal variations in emissions and their contributions to ozone. Results indicate that MEGAN estimates 1.27 times higher BVOC emissions than BEIS, particularly for isoprene and monoterpenes, while the BDSNP scheme predicts higher soil NO emissions compared to YL95. Combined emissions result in ozone and SOA increases of 10.11%–28.40% and 15.03%–62% across China, with significant regional variability. Synergistic effects amplify ozone formation beyond the additive impacts of individual emission sources, particularly in regions like the North China Plain. Our findings underscore the critical need to incorporate detailed biogenic emissions in air quality models to accurately capture ozone dynamics in China. By identifying the significant contributions of BVOCs and soil NO<sub><i>x</i></sub>, this study provides a robust basis for developing refined emission control strategies. The insights gained advance the broader understanding of natural and anthropogenic interactions in atmospheric chemistry, guiding policy interventions to mitigate ozone pollution effectively.</p>\",\"PeriodicalId\":100014,\"journal\":{\"name\":\"ACS ES&T Air\",\"volume\":\"2 8\",\"pages\":\"1538–1551\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS ES&T Air\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsestair.5c00038\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS ES&T Air","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsestair.5c00038","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Model Intercomparisons of MEGAN and BEIS: Synergistic Impacts of Biogenic VOCs and Soil NO Emissions on Summer Ozone and Secondary Organic Aerosol Formation in China
Biogenic volatile organic compounds (BVOCs) and soil nitrogen oxides (NOx) are major natural contributors to ozone (O3) and secondary organic aerosol (SOA) formation. While significant progress has been made in reducing anthropogenic emissions in China, surface ozone levels continue to rise, emphasizing the growing importance of biogenic emissions in air quality management. Despite the availability of various biogenic emission models, including MEGAN v3.2 and BEIS v3.6 for BVOCs and YL95 and BDSNP for soil NO, discrepancies in their estimates introduce uncertainties in understanding their combined impacts on ozone formation. Existing studies largely focus on individual contributions of BVOCs or soil NOx, leaving their synergistic effects underexplored in China. Here, we evaluate the individual and combined impacts of BVOC and soil NOx emissions on ozone formation in China using the MEGAN and BEIS models integrated with the Community Multiscale Air Quality (CMAQ) model. Nine sensitivity scenarios were simulated to examine spatial and temporal variations in emissions and their contributions to ozone. Results indicate that MEGAN estimates 1.27 times higher BVOC emissions than BEIS, particularly for isoprene and monoterpenes, while the BDSNP scheme predicts higher soil NO emissions compared to YL95. Combined emissions result in ozone and SOA increases of 10.11%–28.40% and 15.03%–62% across China, with significant regional variability. Synergistic effects amplify ozone formation beyond the additive impacts of individual emission sources, particularly in regions like the North China Plain. Our findings underscore the critical need to incorporate detailed biogenic emissions in air quality models to accurately capture ozone dynamics in China. By identifying the significant contributions of BVOCs and soil NOx, this study provides a robust basis for developing refined emission control strategies. The insights gained advance the broader understanding of natural and anthropogenic interactions in atmospheric chemistry, guiding policy interventions to mitigate ozone pollution effectively.