Articles | Volume 20, issue 17
Atmos. Chem. Phys., 20, 10757–10774, 2020
https://doi.org/10.5194/acp-20-10757-2020
Atmos. Chem. Phys., 20, 10757–10774, 2020
https://doi.org/10.5194/acp-20-10757-2020

Research article 14 Sep 2020

Research article | 14 Sep 2020

Retrieving tropospheric NO2 vertical column densities around the city of Beijing and estimating NOx emissions based on car MAX-DOAS measurements

Xinghong Cheng et al.

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We carried out 19 city-circle-around Car MAX-DOAS experiments on the 6th Ring Road of Beijing in Jan, Sep, and Oct 2014. The tropospheric VCDs of NO2 are retrieved and their temporal and spatial distributions are investigated. Then the NOx emission rates in urban Beijing are estimated using the measured NO2 VCDs together with the refined wind fields, NO2-to-NOx ratios, and NO2 lifetimes simulated by the LAPS-WRF-CMAQ model system, and results are compared with the MEIC inventory in 2012.
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