Atmospheric aerosols and clouds

Atmospheric aerosols are tiny solid and liquid particles suspended in the air — ranging from sea salt and desert dust to soot from combustion — that interact with sunlight and serve as the seeds around which cloud droplets and ice crystals form. These interactions shape how much solar energy reaches Earth's surface, how water moves through the atmosphere, and how frequently and intensely it rains, making aerosols one of the largest sources of uncertainty in projections of future climate. Researchers combine satellite observations, ground-based measurements, and climate models to quantify how aerosol composition and concentration alter cloud brightness, lifetime, and precipitation patterns across different regions and seasons. Open questions remain around exactly how dust and carbonaceous particles trigger ice formation in high-altitude clouds, and how aerosol-driven changes to the hydrological cycle may shift regional water availability as both emissions and land use continue to evolve.

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123,597

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Keywords

AerosolsClimateHydrological CycleAtmospheric DustRadiative ForcingClouds