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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 9, issue 3 | Copyright

Special issue: Results from the ice nucleation research unit (INUIT) (ACP/AMT...

Special issue: BACCHUS – Impact of Biogenic versus Anthropogenic emissions...

Atmos. Meas. Tech., 9, 1313-1324, 2016
https://doi.org/10.5194/amt-9-1313-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 30 Mar 2016

Research article | 30 Mar 2016

Re-evaluating the Frankfurt isothermal static diffusion chamber for ice nucleation

Jann Schrod1, Anja Danielczok1, Daniel Weber1, Martin Ebert2, Erik S. Thomson3, and Heinz G. Bingemer1 Jann Schrod et al.
  • 1Institute for Atmospheric and Environmental Sciences, J. W. Goethe University, Frankfurt am Main, 60438 Frankfurt, Germany
  • 2Institute for Applied Geosciences, Technical University of Darmstadt, 64287 Darmstadt, Germany
  • 3Department of Chemistry and Molecular Biology, Atmospheric Science, University of Gothenburg, 41296 Gothenburg, Sweden

Abstract. Recently significant advances have been made in the collection, detection and characterization of ice nucleating particles (INPs). Ice nuclei are particles that facilitate the heterogeneous formation of ice within the atmospheric aerosol by lowering the free energy barrier to spontaneous nucleation and growth of ice from atmospheric water and/or vapor. The Frankfurt isostatic diffusion chamber (FRankfurt Ice nucleation Deposition freezinG Experiment: FRIDGE) is an INP collection and offline detection system that has become widely deployed and shows additional potential for ambient measurements. Since its initial development FRIDGE has gone through several iterations and improvements. Here we describe improvements that have been made in the collection and analysis techniques. We detail the uncertainties inherent in the measurement method and suggest a systematic method of error analysis for FRIDGE measurements. Thus what is presented herein should serve as a foundation for the dissemination of all current and future measurements using FRIDGE instrumentation.

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In this manuscript we describe technical and analytical advances that have been implemented for use with the Frankfurt ice nuclei measurement system known as FRIDGE. In particular we focus on a new collection apparatus and improved data analysis protocol. We also provide an outline of how FRIDGE data should be interpreted and reported. Results from an example case study are presented and help to contextualize FRIDGE data with respect to other measurement techniques and modeling efforts.
In this manuscript we describe technical and analytical advances that have been implemented for...
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