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| Influences of Biomass Burning Emissions in Foreign Regions on Springtime Surface Ozone over East Asia |
| Received:January 30, 2019 Revised:June 25, 2019 |
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| DOI：10.7643/ issn.1672-9242.2019.06.017 |
| KeyWord:tropospheric ozone ozone pollution biomass burning source-receptor relationship long-range transport of pollution |
| Author | Institution |
| HAN Han |
a. School of Atmospheric Sciences, Nanjing University, Nanjing , China |
| LIU Jing-xian |
a. School of Atmospheric Sciences, Nanjing University, Nanjing , China |
| ZHANG Xun |
b. International Institute for Earth System Science, Nanjing University, Nanjing , China |
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| Abstract: |
| Objective To study the impact of biomass burning emissions from foreign regions on surface ozone over East Asia in the spring. Methods Combining a sensitivity test and the linear weighting method, we simulated the individual contribution of biomass burning from different foreign regions in the world to surface ozone in East Asia with a global chemical transport model, GEOS-Chem. Results Biomass burning in the Spring of the world contributed 1×10-9~5×10-9 to surface ozone in East Asia, in which, fire-induced ozone from foreign regions accounted for 75%. Fire-induced ozone from foreign regions contributed more to South China than to other regions in East Asia, reaching approximately 3×10-9. Among all the foreign regions, Southeast Asia and Africa were the largest contributors. Fire-induced ozone from Southeast Asia mainly influenced surface ozone in South China, while Africa imposed the largest foreign influences over Northeast China, North China, Korea, and Japan. The later had relatively large influences on South China. Conclusion The influence of biomass burning in foreign regions to springtime surface ozone in East Asia varies largely in space. Biomass burning in foreign regions can impact air quality in East Asia. Regional and international collaborations are needed for ozone pollution control in East Asia. |
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