Articles | Volume 18, issue 1
https://doi.org/10.5194/amt-18-73-2025
https://doi.org/10.5194/amt-18-73-2025
Research article
 | 
08 Jan 2025
Research article |  | 08 Jan 2025

Cancellation of cloud shadow effects in the absorbing aerosol index retrieval algorithm of TROPOMI

Victor J. H. Trees, Ping Wang, Piet Stammes, Lieuwe G. Tilstra, David P. Donovan, and A. Pier Siebesma

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MONKI: a three-dimensional Monte Carlo simulator of total and polarised radiation reflected by planetary atmospheres
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This preprint is open for discussion and under review for Geoscientific Model Development (GMD).
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DARCLOS: a cloud shadow detection algorithm for TROPOMI
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Effects of clouds on the UV Absorbing Aerosol Index from TROPOMI
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Cited articles

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Short summary
Our study investigates the impact of cloud shadows on satellite-based aerosol index measurements over Europe by TROPOMI. Using a cloud shadow detection algorithm and simulations, we found that the overall effect on the aerosol index is minimal. Interestingly, we found that cloud shadows are significantly bluer than their shadow-free surroundings, but the traditional algorithm already (partly) automatically corrects for this increased blueness.
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