Cloud Condensation Nuclei Concentrations

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Presentation transcript:

Cloud Condensation Nuclei Concentrations Göran Frank, Duli Chand, Michael Welling, Pascal Guyon, Meinrat O. Andreae Max Planck Institute for Chemistry, Mainz, Germany

Cloud Condensation Nuclei (CCN) The ability of an aerosol particle to act as a CCN is determined by: Size Chemical composition The cloud droplet size distribution formed is also depending on: Number of aerosol particles The maximum supersaturation achieved

Instrumentation CCN-Mainz CCN-Hannover Thermal gradient type INPE Aircraft Fazenda Nossa Senhora CCN-Hannover Expansion type Fazenda Nossa Senhora

Thermal gradient parallel plate type CCN counter (CCN-Mainz) Laser

CCN Hannover Fazenda Nossa Senhora Data available for the period September 16 – November 14.

Work to be done Continue data evaluation Quality validation CCN/CN ratios Link aerosol particle size distribution, aerosol chemical properties and hygroscopic properties of aerosol particles to cloud-nucleating properties, including CCN concentrations and CCN/CN ratios (WP 3)