Articles | Volume 16, issue 17
Atmos. Chem. Phys., 16, 10927–10940, 2016
https://doi.org/10.5194/acp-16-10927-2016
Atmos. Chem. Phys., 16, 10927–10940, 2016
https://doi.org/10.5194/acp-16-10927-2016
Research article
05 Sep 2016
Research article | 05 Sep 2016

Not all feldspars are equal: a survey of ice nucleating properties across the feldspar group of minerals

Alexander D. Harrison et al.

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Cited articles

Alpert, P. A. and Knopf, D. A.: Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model, Atmos. Chem. Phys., 16, 2083–2107, https://doi.org/10.5194/acp-16-2083-2016, 2016.
Atkinson, J. D., Murray, B. J., Woodhouse, M. T., Whale, T. F., Baustian, K. J., Carslaw, K. S., Dobbie, S., O'Sullivan, D., and Malkin, T. L.: The importance of feldspar for ice nucleation by mineral dust in mixed-phase clouds, Nature, 498, 355–358, https://doi.org/10.1038/nature12278, 2013.
Augustin-Bauditz, S., Wex, H., Kanter, S., Ebert, M., Niedermeier, D., Stolz, F., Prager, A., and Stratmann, F.: The immersion mode ice nucleation behavior of mineral dusts: A comparison of different pure and surface modified dusts, Geophys. Res. Lett., 41, 7375–7382, https://doi.org/10.1002/2014GL061317, 2014.
Berner, R. A. and Holdren, G. R.: Mechanism of feldspar weathering – ii. Observations of feldspars from soils, Geochim. Cosmochim. Acta, 43, 1173–1186, https://doi.org/10.1016/0016-7037(79)90110-8, 1979.
Blum, A. E.: Feldspars in weathering, in: Feldspars and their reactions, Springer, 595–630, 1994.
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Short summary
Mineral dust particles are known to act as effective ice nucleating particles in the atmosphere and to play a role in the glaciation of mixed phase clouds. We have measured the ice nucleation activity of 15 different feldspar samples using a droplet freezing experiment and shown that alkali feldspars nucleate ice much more efficiently than plagioclase feldspars. We have also shown that certain "hyper-active" alkali feldspars nucleate ice very efficiently compared to typical alkali feldspars.
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