Articles | Volume 20, issue 3
https://doi.org/10.5194/acp-20-1483-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-1483-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
07 Feb 2020
Research article |
| 07 Feb 2020
Effect of changing NOx lifetime on the seasonality and long-term trends of satellite-observed tropospheric NO2 columns over China
Harvard John A. Paulson School of Engineering and Applied Sciences,
Harvard University, Cambridge, MA, USA
Daniel J. Jacob
Harvard John A. Paulson School of Engineering and Applied Sciences,
Harvard University, Cambridge, MA, USA
Department of Earth and Planetary Sciences, Harvard University,
Cambridge, MA, USA
Harvard John A. Paulson School of Engineering and Applied Sciences,
Harvard University, Cambridge, MA, USA
Rachel F. Silvern
Department of Earth and Planetary Sciences, Harvard University,
Cambridge, MA, USA
Shixian Zhai
Harvard John A. Paulson School of Engineering and Applied Sciences,
Harvard University, Cambridge, MA, USA
Mengyao Liu
Laboratory for Climate and Ocean-Atmosphere Studies, Department of
Atmospheric & Oceanic Sciences, School of Physics, Peking University,
Beijing, China
Jintai Lin
Laboratory for Climate and Ocean-Atmosphere Studies, Department of
Atmospheric & Oceanic Sciences, School of Physics, Peking University,
Beijing, China
Qiang Zhang
Department of Earth System Science, Tsinghua University, Beijing,
China
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Latest update: 27 May 2023
Short summary
We analyze 15 years of satellite observations of nitrogen dioxide (NO2) and use an atmospheric chemistry model to understand the seasonal changes and trends in nitrogen oxides (NOx) over China. We show that the seasonal changes in NO2 occur due to changes in the NOx oxidation lifetime. We find that Chinese NOx emissions peaked in 2011 and had decreased by about 25 % by 2018. But the decrease in NO2 in winter was larger, likely because of a simultaneous decrease in the NOx oxidation lifetime.
We analyze 15 years of satellite observations of nitrogen dioxide (NO2) and use an atmospheric...
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