Articles | Volume 19, issue 8
https://doi.org/10.5194/acp-19-5451-2019
https://doi.org/10.5194/acp-19-5451-2019
Research article
 | 
25 Apr 2019
Research article |  | 25 Apr 2019

The importance of crystalline phases in ice nucleation by volcanic ash

Elena C. Maters, Donald B. Dingwell, Corrado Cimarelli, Dirk Müller, Thomas F. Whale, and Benjamin J. Murray

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Cited articles

Astbury, R. L., Petrelli, M., Arienzo, I., D'Antonio, M., Morgavi, D., and Perugini, D.: Using trace element mapping to identify discrete magma mixing events from the Astroni 6 eruption, in: American Geophysical Union Fall Meeting 2016, San Francisco, USA, 12–16 December 2016, 2016AGUFM.V33E3176A, 2016. 
Astbury, R. L., Petrelli, M., Ubide, T., Stock, M. J., Arienzo, I., D'Antonio, M., and Perugini, D.: Tracking plumbing system dynamics at the Campi Flegrei caldera, Italy: High-resolution trace element mapping of the Astroni crystal cargo, Lithos, 318–319, 464–477, https://doi.org/10.1016/j.lithos.2018.08.033, 2018. 
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. 
Ayris, P. M., Lee, A. F., Wilson, K., Kueppers, U., Dingwell, D. B., and Delmelle, P.: SO2 sequestration in large volcanic eruptions: high-temperature scavenging by tephra, Geochim. Cosmochim. Ac., 110, 58–69, dio:10.1016/j.gca.2013.02.018, 2013. 
Ayris, P. M., Delmelle, P., Cimarelli, C., Maters, E. C., Suzuki, Y. J., and Dingwell, D. B.: HCl uptake by volcanic ash in the high temperature eruption plume: Mechanistic insights, Geochim. Cosmochim. Ac., 144, 188–201, https://doi.org/10.1016/j.gca.2014.08.028, 2014. 
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Short summary
This experimental study investigates the influence of volcanic ash chemical composition, crystallinity, and mineralogy on its ability to promote freezing of supercooled water. The results indicate that crystals in ash play a key role in this process and suggest that feldspars and perhaps pyroxenes in ash may be highly ice-active. These findings contribute to improving understanding of the potential of ash emissions from different explosive eruptions to impact ice formation in the atmosphere.
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