Predicted cloud droplet numbers Davos Wolfgang

Cloud droplet properties were predicted between February 24 and March 8 2019 for the measurement site Davos Wolfgang (1630 m a.s.l., LON: 9.853594, LAT: 46.835577). Droplet calculations are carried out with the physically based aerosol activation parameterization of Morales and Nenes (2014), employing the “characteristic velocity” approach of Morales and Nenes (2010). Aerosol size distribution observations required to predict the cloud droplet numbers and maximum in-cloud supersaturation are obtained from a Scanning Mobility Particle Size Spectrometer (SMPS) instrument deployed at Davos Wolfgang ( The required vertical velocity measurements are derived from the wind Doppler Lidar ( deployed at the same station and are extracted from the first bin of the instrument, being 200 m above ground level. The hygroscopic properties of the particles measured at Davos Wolfgang could not be estimated, owing to a lack of concurrent CCN measurements. As a sensitivity test, droplet calculations are performed assuming two different values of the aerosol hygroscopicity parameter, 0.1 and 0.25, based on the analysis carried out for Weissfluhjoch. Additional information can be found in Section 2.3 here.

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This work was supported by:

Related Datasets

  • Wieder, Jörg; Rösch, Carolin (2020). Aerosol Data Davos Wolfgang. EnviDat. doi:10.16904/envidat.157.
  • Hervo, Maxim (2020). Wind LIDAR Davos Wolfgang. EnviDat. doi:10.16904/envidat.131.

Related Publications

  • Georgakaki, P., Bougiatioti, A., Wieder, J., Mignani, C., Ramelli, F., Kanji, Z. A., Henneberger, J., Hervo, M., Berne, A., Lohmann, U., and Nenes, A.: On the drivers of droplet variability in Alpine mixed-phase clouds, Atmos. Chem. Phys. Discuss.,, in review, 2020.


Nenes, Athanasios; Georgakaki, Paraskevi; Bougiatioti, Aikaterini (2020). Predicted cloud droplet numbers Davos Wolfgang. EnviDat. doi:10.16904/envidat.199.

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DOI 10.16904/envidat.199
Publication State Published
  • Email: athanasios.nenesfoo(at) Given Name: Athanasios Family Name: Nenes Affiliation: Laboratory of Atmospheric Processes and their Impacts, EPFL Additional Affiliation : Center of Studies on Air Quality and Climate Change, ICE-HT/FORTH DataCRediT: Collection, Validation, Curation, Software, Publication, Supervision
  • Email: paraskevi.georgakakifoo(at) Given Name: Paraskevi Family Name: Georgakaki Affiliation: Laboratory of Atmospheric Processes and their Impacts, EPFL DataCRediT: Validation, Curation, Publication
  • Email: abougiatfoo(at) Given Name: Aikaterini Family Name: Bougiatioti Affiliation: Institute for Environmental Research & Sustainable Development, NOA DataCRediT: Collection
Contact Person Given Name: Athanasios Family Name: Nenes Email: athanasios.nenesfoo(at) Affiliation: LAPI, EPFL/ C-STACC, ICE-HT/FORTH
Publication Publisher: EnviDat Year: 2020
  • Type: Collected Date: 2019-02-24 End Date: 2019-03-08
Version 1.0
Type datapaper
General Type DataPaper
Language English
Location Switzerland
Content License ODbL with Database Contents License (DbCL)    [Open Data]
Last Updated December 17, 2020, 10:39 (+0100)
Created December 12, 2020, 10:17 (+0100)

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Custom Field Values
Geographic Location 46 50′08.076″N 9 51′12.939″E
parent RACLETS Field Campaign