The following institutions participate in the CLOUD Project:

European Organization for Nuclear Research (CERN),
Geneva
Switzerland
J. Kirkby (experiment spokesperson), A. Onnela (resources coordinator & GLIMOS), S. Mathot (technical coordinator)

University of Innsbruck,
Institute for Ion and Applied Physics,
Innsbruck
Austria
A. Hansel

University of Vienna,
Faculty of Physics,
Vienna
Austria
P. Winkler

University of Helsinki,
Department of Physics and Helsinki Institute of Physics,
Helsinki
Finland
M. Kulmala

Finnish Meteorological Institute,
Helsinki
Finland
Y. Viisanen

University of Eastern Finland,
Kuopio
Finland
A. Laaksonen

Johann Wolfgang Goethe-University of Frankfurt,
Institute for Atmospheric and Environmental Sciences,
Frankfurt am Main
Germany
J. Curtius

Leibniz Institute for Tropospheric Research (IfT),
Leipzig
Germany
A. Macke, F. Stratmann

SIM,
University of Lisbon and University of Beira Interior,
Lisbon
Portugal
A. Amorim

Lebedev Physical Institute,
Solar and Cosmic Ray Research Laboratory,
Moscow
Russia
V. Makhmutov

Paul Scherrer Institut (PSI),
Laboratory of Atmospheric Chemistry,
Villigen
Switzerland
U. Baltensperger

University of Leeds,
School of Earth and Environment,
Leeds
United Kingdom
K. Carslaw

University of Stockholm
Department of Environmental Science and Analytical Chemistry
Stockholm
Sweden
I. Riipinen

California Institute of Technology,
Division of Chemistry and Chemical Engineering,
Pasadena, CA
United States
J. Seinfeld, R. Flagan

Carnegie Mellon University,
Department of Chemical Engineering
Pittsburgh
United States
N. Donahue

Karlsruhe Institute of Technology (KIT)
Karlsruhe
Germany
T. Leisner, O. Moehler

Partners

Aerodyne Research,
Billerica, MA
United States
D. R. Worsnop

Ionicon Analytik,
Innsbruck
Austria
A. Hansel

Tofwerk,
Thun
Switzerland
R. Knochenmuss