| Autor: |
Zhang, Xin, Yin, Yan, van der A, Ronald, Eskes, Henk, van Geffen, Jos, Li, Yunyao, Kuang, Xiang, Lapierre, Jeff L., Chen, Kui, Zhen, Zhongxiu, Hu, Jianlin, He, Chuan, Chen, Jinghua, Shi, Rulin, Zhang, Jun, Ye, Xingrong, Chen, Hao |
| Předmět: |
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| Zdroj: |
Atmospheric Chemistry & Physics; 2022, Vol. 22 Issue 9, p5925-5942, 18p |
| Abstrakt: |
Thunderstorms can significantly influence the air composition via strong updraft and lightning nitrogen oxides (LNO x). In this study, the ozonesondes and TROPOMI (TROPOspheric Monitoring Instrument) nitrogen dioxide (NO 2) observations for two cases are combined with a model to investigate the effects of typical strong convection on vertical redistribution of air pollutants in Nanjing, southeastern China. The ozonesonde observations show higher O 3 and water vapor mixing ratios in the upper troposphere (UT) after convection, indicating the strong updraft transporting lower-level air masses into the UT and the possible downward O 3 -rich air near the top of UT over the convective period. During the whole convection life cycle, the UT O 3 production is driven by the chemistry (5–10 times the magnitude of dynamic contribution) and reduced by the LNO x (- 40 %). Sensitivity tests demonstrate that neglecting LNO x in standard TROPOMI NO 2 products causes overestimated air mass factors over fresh lightning regions and the opposite for outflow and aged lightning areas. Therefore, a new high-resolution retrieval algorithm is applied to estimate the LNO x production efficiency. Our work shows the demand for high-resolution modeling and satellite observations on LNO x emissions of both active and dissipated convection, especially small-scale storms. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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