Comparing Urban Anthropogenic NMVOC Measurements With Representation in Emission Inventories—A Global Perspective

Emission inventories are a critical basis for air quality and climate modelling, as well policy decisions. Non-methane volatile organic compounds (NMVOCs) key precursor in ozone secondary aerosol formation. Accurately representing NMVOCs emission is crucial understanding atmospheric chemistry, the impact of measures, projections. Improving NMVOC representation fraught with challenges, ranging from lack (long-term) measurements, limited efforts updating factors, to diversity species reactivity. Here we take an initial step evaluate urban speciation inventory (EDGARv4.3.2 EDGARv6.1) at global level. To compare measurements estimates, ratios individual acetylene used. Owing limitations measurement data grouping inventories, comparison includes only number alkanes, alkenes, aromatics. Results show little no agreement between observations those compared (r2 0.01 – 0.20). This could be related incorrect profiles and/or spatial allocation areas. Regional better among 0.43 0.70). The inclusion oxygenated greater coverage improve mosaic regional may approach.