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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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Johannes Quaas on behalf of the Authors (24 Sep 2020)  Author's response    Manuscript
ED: Publish as is (08 Oct 2020) by Frank Dentener
AR by Johannes Quaas on behalf of the Authors (09 Oct 2020)  Author's response    Manuscript
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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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