Solar radiation modification (SRM) approaches — including stratospheric aerosol injection (SAI), marine cloud brightening (MCB), mixed-phase cloud thinning (MCT), and cirrus cloud thinning (CCT) — are receiving growing scientific attention as potential strategies to offset the positive radiative forcing effect of anthropogenic greenhouse gases. Assessing their feasibility and risks requires understanding the processes governing aerosol microphysical and chemical evolution and liquid, mixed-phase, and ice cloud response to aerosols across diverse atmospheric regimes.

This session invites contributions spanning process-level understanding to large-scale assessments, and studies identifying key observational and modeling gaps, including but not limited to:

• Detailed analyses of processes that determine aerosol composition, optical properties, and cloud interactions
• Observational constraints on aerosols and cloud processes from laboratory, field, and remote sensing studies
• Process-level, high-resolution (e.g., cloud-resolving), and global-scale modeling of aerosol-based interventions
• Feedbacks and downstream consequences of SRM, such as on atmospheric chemistry and regional climate

• B - Biogeosciences
• EP - Earth and Planetary Surface Processes
• GC - Global Environmental Change
• H - Hydrology