Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 2: Deposition nucleation and condensation freezing

Boose, Yvonne; Baloh, Philipp; Plötze, Michael; Ofner, Johannes; Grothe, Hinrich; Sierau, Berko; Lohmann, Ulrike; Kanji, Zamin A.

doi:https://doi.org/10.5194/acp-19-1059-2019

Articles | Volume 19, issue 2

https://doi.org/10.5194/acp-19-1059-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-19-1059-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 2

Research article

|

28 Jan 2019

Research article |

| 28 Jan 2019

Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 2: Deposition nucleation and condensation freezing

Yvonne Boose, Philipp Baloh, Michael Plötze, Johannes Ofner, Hinrich Grothe, Berko Sierau, Ulrike Lohmann, and Zamin A. Kanji

Supplement

https://doi.org/10.5194/acp-19-1059-2019-supplement

Data sets

Heterogeneous ice nucleation on dust particles sourced from 9 deserts worldwide – Part 2: Deposition nucleation and condensation freezing Y. Boose, P. Baloh, M. Plötze, J. Ofner, H. Grothe, B. Sierau, U. Lohmann, and Z. A. Kanji https://doi.org/10.3929/ethz-b-000314622

Short summary

The role non-mineral components play in the freezing behavior of atmospheric desert dust is not well known. In this study, we use chemical imaging methods to investigate this for airborne and surface-collected desert dust samples. We find that in most cases the ice nucleation behavior is determined by the dust mineralogical composition. However, volatile organic material can coat active sites and decrease the dust ice nucleation ability, while biological particles can significantly increase it.