Articles | Volume 22, issue 15
Atmos. Chem. Phys., 22, 10221–10245, 2022
https://doi.org/10.5194/acp-22-10221-2022

Special issue: New observations and related modelling studies of the aerosol–cloud–climate...

Atmos. Chem. Phys., 22, 10221–10245, 2022
https://doi.org/10.5194/acp-22-10221-2022
Research article
10 Aug 2022
Research article | 10 Aug 2022

Sensitivity analysis of an aerosol-aware microphysics scheme in Weather Research and Forecasting (WRF) during case studies of fog in Namibia

Michael John Weston et al.

Data sets

AERCLO-sA PEGASUS CCN Cyrielle Denjean and Thierry Bourrianne https://doi.org/10.6096/AEROCLO.1813

AEROCLO-sA PEGASUS Micrometeorology Paola Formenti and Stuart Piketh https://doi.org/10.6096/AEROCLO.1808

AEROCLO-sA PEGASUS radiosondes Paola Formenti and Stuart Piketh https://doi.org/10.6096/AEROCLO.1806

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Short summary
An aerosol-aware microphysics scheme is evaluated for fog cases in Namibia. AEROCLO-sA campaign observations are used to access and parameterise the model. The model cloud condensation nuclei activation is lower than the observations. The scheme is designed for clouds with updrafts, while fog typically forms in stable conditions. A pseudo updraft speed assigned to the lowest model levels helps achieve more realistic cloud droplet number concentration and size distribution in the model.
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