Aerosols shown to increase size of cloud cells, causing greater radiative cooling under polluted conditions

Phys.org  July 9, 2024 Researchers at Pacific Northwest National Laboratory reconfigured the Weather Research Forecasting (WRF) version 4.3 model to quantify the impact of aerosols on evolving cloud fields. Simulations utilizing meteorological boundary conditions were based on 10 case study days offering diverse meteorology during the Aerosol and Cloud Experiments in the Eastern North Atlantic (ACE-ENA). Measurements demonstrated good agreement with the WRF-simulated cloud and aerosol properties. Higher aerosol concentration led to suppressed drizzle and increased cloud water content; that in turn les to larger radiative cooling rates at cloud top, enhanced vertical velocity variance, and increased vertical and horizontal […]