Articles | Volume 20, issue 23
Atmos. Chem. Phys., 20, 15079–15099, 2020
https://doi.org/10.5194/acp-20-15079-2020
Atmos. Chem. Phys., 20, 15079–15099, 2020
https://doi.org/10.5194/acp-20-15079-2020

Review article 04 Dec 2020

Review article | 04 Dec 2020

Constraining the Twomey effect from satellite observations: issues and perspectives

Johannes Quaas et al.

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Latest update: 24 Oct 2021
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Short summary
Anthropogenic pollution particles – aerosols – serve as cloud condensation nuclei and thus increase cloud droplet concentration and the clouds' reflection of sunlight (a cooling effect on climate). This Twomey effect is poorly constrained by models and requires satellite data for better quantification. The review summarizes the challenges in properly doing so and outlines avenues for progress towards a better use of aerosol retrievals and better retrievals of droplet concentrations.
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