Effects of clouds on the UV Absorbing Aerosol Index from TROPOMI

Kooreman, Maurits L.; Stammes, Piet; Trees, Victor; Sneep, Maarten; Tilstra, L. Gijsbert; de Graaf, Martin; Stein Zweers, Deborah C.; Wang, Ping; Tuinder, Olaf N. E.; Veefkind, J. Pepijn

doi:https://doi.org/10.5194/amt-13-6407-2020

Articles | Volume 13, issue 12

https://doi.org/10.5194/amt-13-6407-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

TROPOMI on Sentinel-5 Precursor: first year in operation (AMT/ACP...

https://doi.org/10.5194/amt-13-6407-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 12

Research article

|

30 Nov 2020

Research article |

| 30 Nov 2020

Effects of clouds on the UV Absorbing Aerosol Index from TROPOMI

Maurits L. Kooreman, Piet Stammes, Victor Trees, Maarten Sneep, L. Gijsbert Tilstra, Martin de Graaf, Deborah C. Stein Zweers, Ping Wang, Olaf N. E. Tuinder, and J. Pepijn Veefkind

Data sets

TROPOMI Level 2 Ultraviolet Aerosol Index products, Version 01 Copernicus Sentinel-5P (processed by ESA) https://doi.org/10.5270/S5P-0wafvaf

Short summary

We investigated the influence of clouds on the Absorbing Aerosol Index (AAI), an indicator of the presence of small particles in the atmosphere. Clouds produce artifacts in AAI calculations on the individual measurement (7 km) scale, which was not seen with previous instruments, as well as on large (1000+ km) scales. To reduce these artefacts, we used three different AAI calculation techniques of varying complexity. We find that the AAI artifacts are reduced when using more complex techniques.