Collocated observations of cloud condensation nuclei, particle size distributions, and chemical composition

Research output: Contribution to journalArticle


Cloud condensation nuclei (CCN) number concentrations alongside with submicrometer particle number size distributions and particle chemical composition have been measured at atmospheric observatories of the Aerosols, Clouds, and Trace gases Research InfraStructure (ACTRIS) as well as other international sites over multiple years. Here, harmonized data records from 11 observatories are summarized, spanning 98,677 instrument hours for CCN data, 157,880 for particle number size distributions, and 70,817 for chemical composition data. The observatories represent nine different environments, e.g., Arctic, Atlantic, Pacific and Mediterranean maritime, boreal forest, or high alpine atmospheric conditions. This is a unique collection of aerosol particle properties most relevant for studying aerosol-cloud interactions which constitute the largest uncertainty in anthropogenic radiative forcing of the climate. The dataset is appropriate for comprehensive aerosol characterization (e.g., closure studies of CCN), model-measurement intercomparison and satellite retrieval method evaluation, among others. Data have been acquired and processed following international recommendations for quality assurance and have undergone multiple stages of quality assessment.


  • Julia Schmale
  • Silvia Henning
  • Bas Henzing
  • Helmi Keskinen
  • Karine Sellegri
  • Jurgita Ovadnevaite
  • Aikaterini Bougiatioti
  • Nikos Kalivitis
  • Iasonas Stavroulas
  • Anne Jefferson
  • Minsu Park
  • Patrick Schlag
  • Yoko Iwamoto
  • Kirsty Pringle
  • Carly Reddington
  • Pasi Aalto
  • Mikko Äijälä
  • Urs Baltensperger
  • Jakub Bialek
  • Wolfram Birmili
  • Nicolas Bukowiecki
  • Mikael Ehn
  • Ann Mari Fjæraa
  • Markus Fiebig
  • Roman Fröhlich
  • Arnoud Frumau
  • Masaki Furuya
  • Emanuel Hammer
  • Liine Heikkinen
  • Erik Herrmann
  • Rupert Holzinger
  • Hiroyuki Hyono
  • Maria Kanakidou
  • Astrid Kiendler-Scharr
  • Kento Kinouchi
  • Gerard Kos
  • Markku Kulmala
  • Nikolaos Mihalopoulos
  • Ghislain Motos
  • Athanasios Nenes
  • Colin O'Dowd
  • Mikhail Paramonov
  • Tuukka Petäjä
  • David Picard
  • Laurent Poulain
External organisations
  • Paul Scherrer Institute
  • Leibniz Institute for Tropospheric Research (TROPOS)
  • Netherlands Organisation for Applied Scientific Research (Hague)
  • University of Helsinki
  • Hyytiälä Forestry Field Station
  • Laboratoire de Méteorologie Physique (LaMP-CNRS)
  • National University of Ireland Galway
  • University of Crete
  • National Observatory of Athens
  • University of Colorado
  • Yonsei University
  • Institute for Marine and Atmospheric Research, Utrecht
  • Jülich Research Centre
  • Kanazawa University
  • Tokyo University of Science
  • University of Leeds
  • German Federal Environment Agency (Umweltbundesamt)
  • Norwegian Institute for Air Research
  • Energy Research Centre of the Netherlands
  • Grolimund + Partner AG
  • Georgia Institute of Technology
  • Foundation for Research and Technology - Hellas
  • ETH Zürich
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Oceanography, Hydrology, Water Resources
Original languageEnglish
Article number170003
JournalScientific Data
Publication statusPublished - 2017 Mar 14
Publication categoryResearch