Anthropogenic monoterpenes aggravating ozone pollution

Author:

Wang Haichao123,Ma Xuefei1,Tan Zhaofeng4,Wang Hongli5,Chen Xiaorui1,Chen Shiyi1,Gao Yaqin5,Liu Ying1,Liu Yuhan1,Yang Xinping1,Yuan Bin6ORCID,Zeng Limin1,Huang Cheng5,Lu Keding1ORCID,Zhang Yuanhang1

Affiliation:

1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environmental Protection Key Laboratory of Atmospheric Ozone Pollution Control, College of Environmental Sciences and Engineering, Peking University , Beijing 100871 , China

2. School of Atmospheric Sciences, Sun Yat-sen University , Guangzhou 510275 , China

3. Guangdong Provincial Observation and Research Station for Climate Environment and Air Quality Change in the Pearl River Estuary, Key Laboratory of Tropical Atmosphere–Ocean System, Ministry of Education, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) , Zhuhai 519082 , China

4. Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH , Jülich 52428 , Germany

5. State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Complex, Shanghai Academy of Environmental Sciences , Shanghai 200223 , China

6. Institute for Environmental and Climate Research, Jinan University , Guangzhou 511443 , China

Abstract

Abstract Monoterpenes have been known to have a critical influence on air quality and climate change through their impact on the formation of fine particles. Here we present field evidence that monoterpene oxidations largely enhanced local ozone production in a regional site in eastern China. The observed monoterpene was most likely from biomass burning rather than biogenic emissions, as indicated by the high correlation with CO at night-time, and the observed ratio of these two species was consistent with previously determined values from biomass burning experiments. Fast monoterpene oxidations were determined experimentally based on direct radical measurements, leading to a daily ozone enhancement of 4–18 parts per billion by volume (ppb), which was 6%–16% of the total ozone production, depending on the speciation of monoterpenes. It demonstrates that the previously overlooked anthropogenic monoterpenes make an important contribution to O3 production in eastern China. The role could possibly be important at similar locations across China and other parts of the world that are characterized by massive emissions, especially where there are high NOx levels. Our results highlight that anthropogenic monoterpenes should be taken into account when proceeding with the coordinated mitigation of O3 and particulate matter pollution.

Funder

Beijing Municipal Natural Science Foundation

National Natural Science Foundation of China

Publisher

Oxford University Press (OUP)

Subject

Multidisciplinary

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