Signatures of aerosol-cloud interactions in GiOcean:  a coupled global reanalysis with  two-moment cloud microphysics

Song, Ci; McCoy, Daniel; Molod, Andrea; Barahona, Donifan; Aerenson, Travis

doi:10.5194/acp-25-15567-2025

Articles | Volume 25, issue 21

https://doi.org/10.5194/acp-25-15567-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-15567-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 21

Research article

|

13 Nov 2025

Research article |

| 13 Nov 2025

Signatures of aerosol-cloud interactions in GiOcean: a coupled global reanalysis with two-moment cloud microphysics

Ci Song, Daniel McCoy, Andrea Molod, Donifan Barahona, and Travis Aerenson

Supplement

https://doi.org/10.5194/acp-25-15567-2025-supplement

Data sets

Daily MODIS (MODerate Imaging Spectroradiometer) derived cloud droplet number concentration global dataset for 2003-2015 D. Grosvenor and R. Wood https://catalogue.ceda.ac.uk/uuid/cf97ccc802d348ec8a3b6f2995dfbbff

GPM IMERG Final Precipitation L3 1 day 0.1 degree x 0.1 degree V07 G. J. Huffman et al. https://doi.org/10.5067/GPM/IMERGDF/DAY/07

Model code and software

Goddard Earth Observing System - Earth System Modeling (GEOS-ESM) NASA Global Modeling and Assimilation Office https://github.com/GEOS-ESM

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Short summary

Uncertainty in how clouds respond to aerosols limits predictions of future warming. This study uses GiOcean, a global reanalysis with detailed cloud microphysics to represent aerosol–cloud interactions (ACI). We assess warm cloud responses by comparing variables important for ACI between GiOcean and satellite observations and further evaluate changes in cloud properties using a source–sink budget framework.