The southeast Atlantic hosts one of the largest subtropical stratocumulus decks on the globe along with the presence of spatially extensive shortwave-absorbing aerosols originating from biomass burning on continental Africa. From 2016 to 2018, four field experiments examined this unique aerosol–cloud system, motivated by common interests in articulating the direct, semidirect, and indirect radiative effects; improving representation thereof in global models; and understanding the relevant underlying processes. These campaigns are composed of NASA ORACLES (Observations of Aerosols above Clouds and their interactions), U.K. CLARIFY (Clouds and Aerosol Radiative Impacts and Forcing: Year 2017 ), the French-led AEROCLO-Sa (Aerosol Radiation and Clouds in southern Africa), and DOE LASIC (Layered Atlantic Interactions with Clouds). The campaigns include both aircraft and surface-based deployments, and are sampled from diverse locations. By the time of this session, all campaigns will have finished with datasets from the DOE and the first two NASA deployments publicly available. We invite presentations based on these and other relevant datasets (e.g., ATom) and relevant modeling studies, both process-oriented and examining impacts.

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