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

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Cited articles

Anderson, G. P., Clough, S. A., Kneizys, F. X., Chetwynd, J. H., and Shettle, E. P.: AFGL Atmospheric Constituent Profiles (0–120 km), AFGL-TR-86-0110, Air Force Geophysics Lab., Hanscom AFB, MA, USA, 1986. a
Apituley, A., Pedergnana, M., Sneep, M., Veefkind, J., Loyola, D., and Stein Zweers, D. C.: TROPOMI PUM of the UV aerosol index document number – S5P-KNMI-L2-0026-MA, KNMI, de Bilt, the Netherlands, CI-7570-PUM, p. 116, available at: (last access: 25 November 2020), 2018. a
Arévalo, V., González, J., and Ambrioso, G.: Detecting Shadow QuickBird satellite images, Commission VII Mid-term Symposium “Remote Sensing: From Pixels to Processes”, 8–11 May 2006, Enschede, the Netherlands, available at: (last access: 25 November 2020), 2006. a
Boucher, O.: Atmospheric Aerosols. Properties and Climate Impacts, Springer, Dordrecht, the Netherlands, 2015. a
Chandrasekhar, S.: Radiative Transfer, Mineola, Dover, UK, 1960. a
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.