Intermediate‐Volatility Organic Compounds (IVOCs) Emissions Based on Source‐Specific Emission Ratios Relative to NonMethane Volatile Organic Compounds (NMVOCs) Give Better Representation of the Spatial Distribution of IVOCs in China
Year: 2024
Type: article
Abstract: Intermediate‐volatility organic compounds (IVOCs) and their contribution to secondary organic aerosols (SOA) in China are simulated in GEOS‐Chem with seven newly constructed IVOCs emission inventories (IEIs). The IEIs based on different references and source‐specific emission ratios show a large range of emissions in China (4.8–14 Tg yr−1) and also significant differences in major sources and spatial distributions. Among them, the IEI relative to nonMethane volatile organic compounds (NMVOCs) with a total emission of 12 Tg yr−1, dominated by solvent use, better captures observed spatial distributions of IVOCs and SOA. In contrast, IEIs relative to primary organic aerosols (POA) misinterpret the major sources and tend to have a negative bias in megacities even when the total emission is scaled up to 14 Tg yr−1. The study indicates that previous studies have underestimated IVOCs emission and hence the contribution to SOA. It also demonstrates the importance of using an appropriate reference to better represent the major sources and the spatial distribution of IVOCs.
DOI: 10.1029/2024jd041464
Institutions: Jinan University, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Shanghai Academy of Environmental Sciences, Chinese Academy of Sciences, Institute of Atmospheric Physics, State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Max Planck Institute for Chemistry
Language: English
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: bronze
OpenAlex ID: W4405917064