Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 1: Immersion freezing

Boose, Yvonne; Welti, André; Atkinson, James; Ramelli, Fabiola; Danielczok, Anja; Bingemer, Heinz G.; Plötze, Michael; Sierau, Berko; Kanji, Zamin A.; Lohmann, Ulrike

doi:https://doi.org/10.5194/acp-16-15075-2016

Articles | Volume 16, issue 23

https://doi.org/10.5194/acp-16-15075-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

BACCHUS – Impact of Biogenic versus Anthropogenic emissions...

https://doi.org/10.5194/acp-16-15075-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 23

Research article

|

06 Dec 2016

Research article |

| 06 Dec 2016

Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 1: Immersion freezing

Yvonne Boose, André Welti, James Atkinson, Fabiola Ramelli, Anja Danielczok, Heinz G. Bingemer, Michael Plötze, Berko Sierau, Zamin A. Kanji, and Ulrike Lohmann

Supplement

https://doi.org/10.5194/acp-16-15075-2016-supplement

Data sets

Ice nuceation and mineralogy data set of desert dust samples Yvonne Boose and Zamin A. Kanji https://polybox.ethz.ch/index.php/s/AjQknR3cQGVwVGU

Short summary

We compare the immersion freezing behavior of four airborne to 11 surface-collected dust samples to investigate the role of different minerals for atmospheric ice nucleation on desert dust. We find that present K-feldspars dominate at T > 253 K, while quartz does at colder temperatures, and surface-collected dust samples are not necessarily representative for airborne dust. For improved ice cloud prediction, modeling of quartz and feldspar emission and transport are key.