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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2019-291
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-291
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 24 Sep 2019

Submitted as: research article | 24 Sep 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Mapping ice formation to mineral-surface topography using a micro mixing chamber with video and atomic-force microscopy

Raymond W. Friddle and Konrad Thürmer Raymond W. Friddle and Konrad Thürmer
  • Sandia National Laboratory, Livermore, 94550, USA

Abstract. We developed a method for examining ice formation on solid materials under cloud-like conditions. Our experimental approach couples video-rate optical microscopy of ice formation with high-resolution atomic force microscopy (AFM) of the initial mineral surface. We demonstrate how colocating stitched AFM images with video microscopy can be used to relate the likelihood of ice formation to nanoscale properties of a mineral substrate, e.g., the abundance of surface steps of a certain height. We also discuss the potential of this setup for future iterative investigations of the properties of ice nucleation sites on materials.

Raymond W. Friddle and Konrad Thürmer
Interactive discussion
Status: open (until 19 Nov 2019)
Status: open (until 19 Nov 2019)
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Raymond W. Friddle and Konrad Thürmer
Video supplement

Video microscopy of ice nucleation and growth on the (001) face of orthoclase at -30 C R. Friddle and K. Thürmer https://doi.org/10.7910/DVN/DZUZ6P

Raymond W. Friddle and Konrad Thürmer
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Latest update: 23 Oct 2019
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Short summary
An obstacle to predicting ice content in mixed-phase clouds is the inability to directly view atmospheric ice nucleation at the nanoscale – where this process occurs. Here we show how a cloud-like environment can be created in a small Atomic Force Microscopy (AFM) sample cell. By collocating video microscopy of ice formation with high resolution AFM images, we quantitatively show how the surface topography, down to nm length-scales, can determine the preferential locations of ice formation.
An obstacle to predicting ice content in mixed-phase clouds is the inability to directly view...
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