Intercomparing different devices for the investigation of ice nucleating particles using Snomax® as test substance
Seven different instruments and measurement methods were used to examine - the immersion freezing of bacterial ice nuclei from - Snomax® (hereafter Snomax), a product containing ice - active protein complexes from non-viable Pseudomonas syringae bacteria. - The experimental conditions were kept as...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
September 1, 2014
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| In: |
Atmospheric chemistry and physics. Discussions
Year: 2014, Jahrgang: 14, Heft: 16, Pages: 22321-22384 |
| ISSN: | 1680-7375 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: http://adsabs.harvard.edu/abs/2014ACPD...1422321W
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| Verfasserangaben: | H. Wex, S. Augustin-Bauditz, Y. Boose, C. Budke, J. Curtius, K. Diehl, A. Dreyer, F. Frank, S. Hartmann, N. Hiranuma, E. Jantsch, Z.A. Kanji, A. Kiselev, T. Koop, O. Möhler, D. Niedermeier, B. Nillius, M. Rösch, D. Rose, C. Schmidt, I. Steinke, and F. Stratmann |
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| 245 | 1 | 0 | |a Intercomparing different devices for the investigation of ice nucleating particles using Snomax® as test substance |c H. Wex, S. Augustin-Bauditz, Y. Boose, C. Budke, J. Curtius, K. Diehl, A. Dreyer, F. Frank, S. Hartmann, N. Hiranuma, E. Jantsch, Z.A. Kanji, A. Kiselev, T. Koop, O. Möhler, D. Niedermeier, B. Nillius, M. Rösch, D. Rose, C. Schmidt, I. Steinke, and F. Stratmann |
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| 520 | |a Seven different instruments and measurement methods were used to examine - the immersion freezing of bacterial ice nuclei from - Snomax® (hereafter Snomax), a product containing ice - active protein complexes from non-viable Pseudomonas syringae bacteria. - The experimental conditions were kept as similar as possible for the - different measurements. Of the participating instruments, some examined - droplets which had been made from suspensions directly, and the others - examined droplets activated on previously generated Snomax particles, - with particle diameters of mostly a few hundred nanometers and up to a - few micrometers in some cases. Data were obtained in the temperature - range from -2 to -38 °C, and it was found that all ice active - protein complexes were already activated above -12 °C. Droplets with - different Snomax mass concentrations covering 10 orders of magnitude - were examined. Some instruments had very short ice nucleation times down - to below 1 s, while others had comparably slow cooling rates around 1 K - min-1. Displaying data from the different instruments in - terms of numbers of ice active protein complexes per dry mass of Snomax, - nm, showed that within their uncertainty the data agree well - with each other as well as to previously reported literature results. - Two parameterizations were taken from literature for a direct comparison - to our results, and these were a time dependent approach based on a - contact angle distribution Niedermeier et al. (2014) and a modification - of the parameterization presented in Hartmann et~al.~(2013) representing - a time independent approach. The agreement between these and the - measured data were good, i.e. they agreed within a temperature range of - 0.6 K or equivalently a range in nm of a factor of 2. From - the results presented herein, we propose that Snomax, at least when - carefully shared and prepared, is a suitable material to test and - compare different instruments for their accuracy of measuring immersion - freezing. | ||
| 700 | 1 | |a Augustin-Bauditz, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Boose, Y. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Budke, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Curtius, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Diehl, K. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Kiselev, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Koop, T. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Möhler, O. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Rose, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schmidt, Christina |e VerfasserIn |0 (DE-588)1166160289 |0 (DE-627)1030095876 |0 (DE-576)51064810X |4 aut | |
| 700 | 1 | |8 1\p |a Steinke, Isabelle |e VerfasserIn |0 (DE-588)1046686569 |0 (DE-627)77693256X |0 (DE-576)319284131 |4 aut | |
| 700 | 1 | |a Stratmann, F. |e VerfasserIn |4 aut | |
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