Atmospheric aerosols and clouds

Aerosols — tiny solid and liquid particles suspended in the atmosphere, from sea salt and dust to soot and sulfates — interact with sunlight and moisture in ways that measurably alter Earth's energy balance and rainfall patterns. By absorbing or scattering incoming radiation and by seeding cloud droplets, they can either warm or cool the climate depending on their composition and location, making them one of the largest sources of uncertainty in projections of future climate change. Satellite observations and remote sensing have dramatically expanded the ability to track aerosol distribution and cloud properties at global scale, yet fundamental questions remain about how aerosols influence cloud lifetime, precipitation efficiency, and ice nucleation under different atmospheric conditions. Understanding these interactions more precisely is essential not only for improving climate models but also for assessing how improving air quality — by reducing combustion emissions, for instance — may itself feed back on regional temperature and the hydrological cycle.

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Keywords

AerosolsClimateHydrological CycleAtmospheric DustRadiative ForcingClouds