CERN Accelerating science

CLOUD

CLOUD experiments show that trees can make their own clouds.

Atmospheric aerosols are tiny solid or liquid droplets suspended in the air. They are all around us, emitted from a variety of natural and anthropogenic sources. Although aerosol particles are too small to be seen with the human eye, they have a…

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FLOTUS: a new addition to the CLOUD experiment

The Flow TUbe System (FLOTUS) during its installation at CLOUD, November 2022. Credit: Maximilien Brice, CERN   Introduction Atmospheric aerosols are tiny solid or liquid particles that are suspended in the Earth's atmosphere. Aerosol particles can…

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CLOUD experiment makes its own clouds to study

The Intergovernmental Panel on Climate Change (IPCC) recognizes aerosols (small nanometer to micrometer sized particles suspended in air) as the single biggest source of uncertainty in human-driven climate change. Atmospheric aerosol particles are…

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Cloud(y) climate studies at CERN

Continuous improvements to the CLOUD facility as well as to the instruments combined with the state of the art know-how available at CERN have enabled a steady increase in the measurement capabilities and resulted in numerous high impact…

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The CLOUD Experiment

CLOUD Collaboration: Aerodyne Research Inc., Billerica, Massachusetts 01821, USA California Institute of Technology, Div. of Chemistry & Chemical Engineering, Pasadena, California 91125, USA Carnegie Mellon University, Center for Atmospheric…

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CLOUD

A new experiment, known as CLOUD1, began operation at the CERN PS in November 2009 [CERN Bulletin (2009)]. The CLOUD collaboration comprises 17 institutes from Europe, Russia and the United States, and brings together a diverse interdisciplinary…

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