Articles | Volume 14, issue 10
Atmos. Meas. Tech., 14, 6469–6482, 2021
https://doi.org/10.5194/amt-14-6469-2021
Atmos. Meas. Tech., 14, 6469–6482, 2021
https://doi.org/10.5194/amt-14-6469-2021
Research article
08 Oct 2021
Research article | 08 Oct 2021

Impact of 3D radiative transfer on airborne NO2 imaging remote sensing over cities with buildings

Marc Schwaerzel et al.

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Latest update: 31 Jan 2023
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Short summary
NO2 maps from airborne imaging remote sensing often appear much smoother than one would expect from high-resolution model simulations of NO2 over cities, despite the small ground-pixel size of the sensors. Our case study over Zurich, using the newly implemented building module of the MYSTIC radiative transfer solver, shows that the 3D effect can explain part of the smearing and that building shadows cause a noticeable underestimation and noise in the measured NO2 columns.