Articles | Volume 17, issue 18
https://doi.org/10.5194/amt-17-5525-2024
https://doi.org/10.5194/amt-17-5525-2024
Research article
 | 
18 Sep 2024
Research article |  | 18 Sep 2024

Assessment of the impact of NO2 contribution on aerosol-optical-depth measurements at several sites worldwide

Akriti Masoom, Stelios Kazadzis, Masimo Valeri, Ioannis-Panagiotis Raptis, Gabrielle Brizzi, Kyriakoula Papachristopoulou, Francesca Barnaba, Stefano Casadio, Axel Kreuter, and Fabrizio Niro

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Cited articles

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Short summary
Aerosols, which have a wide impact on climate, radiative forcing, and human health, are widely represented by aerosol optical depth (AOD). AOD retrievals require Rayleigh scattering and atmospheric absorption (ozone, NO2, etc.) corrections. We analysed the NO2 (which has a high spatiotemporal variation) uncertainty impact on AOD  retrievals using the synergy of co-located ground-based instruments with a long-term dataset at worldwide sites and found significant AOD over- or underestimations.
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