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. 2021 Apr 30;38(7):1085–1100. doi: 10.1007/s00376-021-0317-6

Spatial and Temporal Distributions and Sources of Anthropogenic NMVOCs in the Atmosphere of China: A Review

Fanglin Wang 1, Wei Du 1, Shaojun Lv 1, Zhijian Ding 1, Gehui Wang 1,2,✉
PMCID: PMC8085794  PMID: 33948045

Abstract

As the key precursors of O3, anthropogenic non-methane volatile organic compounds (NMVOCs) have been studied intensively. This paper performed a meta-analysis on the spatial and temporal variations of NMVOCs, their roles in photochemical reactions, and their sources in China, based on published research. The results showed that both non-methane hydrocarbons (NMHCs) and oxygenated VOCs (OVOCs) in China have higher mixing ratios in the eastern developed cities compared to those in the central and western areas. Alkanes are the most abundant NMHCs species in all reported sites while formaldehyde is the most abundant among the OVOCs. OVOCs have the highest mixing ratios in summer and the lowest in winter, which is opposite to NMHCs. Among all NMVOCs, the top eight species account for 50%–70% of the total ozone formation potential (OFP) with different compositions and contributions in different areas. In devolved regions, OFP-NMHCs are the highest in winter while OFP-OVOCs are the highest in summer. Based on positive matrix factorization (PMF) analysis, vehicle exhaust, industrial emissions, and solvent usage in China are the main sources for NMHCs. However, the emission trend analysis showed that solvent usage and industrial emissions will exceed vehicle exhaust and become the two major sources of NMVOCs in near future. Based on the meta-analysis conducted in this work, we believe that the spatio-temporal variations and oxidation mechanisms of atmospheric OVOCs, as well as generating a higher spatial resolution of emission inventories of NMVOCs represent an area for future studies on NMVOCs in China.

Key words: NMVOCs, spatial-temporal distribution, photochemical activity, source analysis

Acknowledgements

This work was financially supported by the National Key R&D Plan programs (Grant No. 2017YFC0210005) and the National Natural Science Foundation of China (Grant No. 41773117).

Footnotes

Article Highlights

• Both NMHCs and OVOCs are more abundant in eastern developed cities than those in central and western areas.

• Among all measured NMVOCs species, OVOCs have become the second most abundant species in China.

• The top eight active NMVOCs species account for 50%–70% of OFP, and NMHCs have the highest OFP in winter while OVOCs have the highest OFP in summer.

• Vehicle exhaust, industrial emissions, and solvent usage are the main sources of NMVOCs.

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